Hans Olofsson

Full Professor at Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Galactic Astrophysics

My research focusses on the final evolution of solar-type stars on and beyond the asymptotic giant branch (AGB). These stars are important ingredients in the life cycle of galaxies, maybe even in the early universe. The stellar mass loss is the key process, and the stellar winds provide the dust and molecular line emission which lies at the base of the analysis. Of particular importance are the compositions of the stellar winds, i.e., atomic and molecular abundances, isotope ratios, and dust species. Finally, the dramatic changes in mass-loss properties and chemistry as the object leaves the AGB and evolves towards the planetary nebula stage are part of the research.

Source: chalmers.se

Showing 120 publications

2019

HD 101584: circumstellar characteristics and evolutionary status

Hans Olofsson, Theo Khouri, Matthias Maercker et al
Astronomy and Astrophysics. Vol. 623
Journal article
2019

Detection of highly excited OH towards AGB stars: A new probe of shocked gas in the extended atmospheres

Theo Khouri, Luis Velilla Prieto, Elvire De Beck et al
Astronomy and Astrophysics. Vol. 623
Journal article
2019

ALMA observations of the "fresh" carbon-rich AGB star TX Piscium The discovery of an elliptical detached shell

M. Brunner, M. Mecina, Matthias Maercker et al
Astronomy and Astrophysics. Vol. 621
Journal article
2018

Rotation of the asymptotic giant branch star R Doradus

Wouter Vlemmings, Theo Khouri, Elvire De Beck et al
Astronomy and Astrophysics. Vol. 613
Journal article
2018

High-resolution observations of gas and dust around Mira using ALMA and SPHERE/ZIMPOL

Theo Khouri, Wouter Vlemmings, Hans Olofsson et al
Astronomy and Astrophysics. Vol. 620
Journal article
2018

Circumstellar environment of the M-type AGB star R Doradus APEX spectral scan at 159.0-368.5GHz

Elvire De Beck, Hans Olofsson
Astronomy and Astrophysics. Vol. 615
Journal article
2018

Sulphur-bearing molecules in AGB stars. Part 2. II. Abundances and distributions of CS and SiS

T. Danilovich, S. Ramstedt, D. Gobrecht et al
Astronomy and Astrophysics. Vol. 617
Journal article
2018

SEPIA - A new single pixel receiver at the APEX telescope

Victor Belitsky, Igor Lapkin, Mathias Fredrixon et al
Astronomy and Astrophysics. Vol. 612
Journal article
2018

Mass loss of stars on the asymptotic giant branch: Mechanisms, models and measurements

S. Höfner, Hans Olofsson
Astronomy and Astrophysics Review. Vol. 26 (1)
Review article
2017

ALMA Compact Array observations of the Fried Egg nebula: Evidence for large-scale asymmetric mass-loss from the yellow hypergiant IRAS 17163-3907

Sofia Wallström, E. Lagadec, Sebastien Muller et al
Astronomy and Astrophysics. Vol. 597, p. A99, pp. 1-10
Journal article
2017

Aperture synthesis imaging of the carbon AGB star R Sculptoris: Detection of a complex structure and a dominating spot on the stellar disk

M. Wittkowski, K. H. Hofmann, S. Höfner et al
Astronomy and Astrophysics. Vol. 601
Journal article
2017

Sulphur-bearing molecules in AGB stars. Part I. The occurrence of hydrogen sulphide

Taissa Danilovich, M. Van De Sande, Elvire De Beck et al
Astronomy and Astrophysics. Vol. 606
Journal article
2017

First detection of methanol towards a post-AGB object, HD 101584

Hans Olofsson, Wouter Vlemmings, Per Bergman et al
Astronomy and Astrophysics. Vol. 603, p. L2-
Journal article
2017

Search for aluminium monoxide in the winds of oxygen-rich AGB stars

Elvire De Beck, L. Decin, S. Ramstedt et al
Astronomy and Astrophysics. Vol. 598, p. A53-
Journal article
2017

(HCN)-C-12 and (HCN)-C-13 excitation analysis in the circumstellar outflow of R Sculptoris

Maryam Saberi, Matthias Maercker, Elvire De Beck et al
Astronomy and Astrophysics. Vol. 599
Journal article
2017

The VLTI/MIDI view on the inner mass loss of evolved stars from the Herschel MESS sample

C. Paladini, D. Klotz, S. Sacuto et al
Astronomy and Astrophysics. Vol. 600
Journal article
2017

Water isotopologues in the circumstellar envelopes of M-type AGB stars

Taissa Danilovich, Robin Lombaert, L. Decin et al
Astronomy and Astrophysics. Vol. 602, p. Article number A14-
Journal article
2017

The circumstellar envelope around the S-type AGB star W Aql Effects of an eccentric binary orbit

S. Ramstedt, S. Mohamed, Wouter Vlemmings et al
Astronomy and Astrophysics. Vol. 605
Journal article
2017

Nucleosynthesis in AGB stars traced by oxygen isotopic ratios: I. Determining the stellar initial mass by means of the 17O/18O ratio

R. De Nutte, L. Decin, Hans Olofsson et al
Astronomy and Astrophysics. Vol. 600
Journal article
2017

Rings and filaments: The remarkable detached CO shell of U Antliae

F. Kerschbaum, Matthias Maercker, M. Brunner et al
Astronomy and Astrophysics. Vol. 605
Journal article
2017

The shock-heated atmosphere of an asymptotic giant branch star resolved by ALMA

Wouter Vlemmings, Theo Khouri, Eamon O Gorman et al
Nature Astronomy. Vol. 1 (12), p. 848-853
Journal article
2016

Herschel/HIFI observations of the circumstellar ammonia lines in IRC+10216

M. Schmidt, J. H. He, R. Szczerba et al
Astronomy and Astrophysics. Vol. 592
Journal article
2016

The ALMA detection of CO rotational line emission in AGB stars in the Large Magellanic Cloud

M. A. T. Groenewegen, Wouter Vlemmings, P. Marigo et al
Astronomy and Astrophysics. Vol. 596, p. 50-
Journal article
2016

A detailed view of the gas shell around R Sculptoris with ALMA

Matthias Maercker, Wouter Vlemmings, M. Brunner et al
Astronomy and Astrophysics. Vol. 586 (Art. Nr. A5)
Journal article
2016

Sulphur molecules in the circumstellar envelopes of M-type AGB stars

Taissa Danilovich, Elvire De Beck, John H Black et al
Astronomy and Astrophysics. Vol. 588
Journal article
2016

An ALMA view of the post-AGB object HD 101584

Hans Olofsson, Wouter Vlemmings, Matthias Maercker et al
Journal of Physics: Conference Series. Vol. 728 (4)
Paper in proceedings
2016

A HIFI view on circumstellar H 2 O in M-type AGB stars: Radiative transfer, velocity profiles, and H 2 O line cooling

Matthias Maercker, Taissa Danilovich, Hans Olofsson et al
Astronomy and Astrophysics. Vol. 591, p. Art. no. A44-
Journal article
2015

Classifying the secondary component of the binary star W Aquilae

Taissa Danilovich, G. Olofsson, John H Black et al
Astronomy and Astrophysics. Vol. 574, p. Art- no. A23
Journal article
2015

Herschel observations of extreme OH/IR stars: The isotopic ratios of oxygen as a sign-post for the stellar mass

Kay Justtanont, M. J. Barlow, Jadl Blommaert et al
Astronomy and Astrophysics. Vol. 578
Journal article
2015

H2O Isotopologues in Extreme OH/IR Stars

Kay Justtanont, M. J. Barlow, Jadl Blommaert et al
Astronomical Society of the Pacific Conference Series: Conference on Why Galaxies Care About AGB Stars III: A Closer Look in Space and Time, Vienna, Austria, JUL 28-AUG 01, 2014. Vol. 497, p. 85-89
Paper in proceedings
2015

Nucleosynthesis in AGB Stars Traced by Oxygen Isotopic Ratios

R. De Nutte, L. Decin, Hans Olofsson et al
Conference on Why Galaxies Care About AGB Stars III: A Closer Look in Space and Time, Vienna, 28- July - 1 Aug. 2014: (Astronomical Society of the Pacific Conference Series). Vol. 497, p. 289-294
Paper in proceedings
2015

An ALMA View of the Complex Circumstellar Environment of the Post-AGB Object HD 101584

Hans Olofsson, Wouter Vlemmings, Matthias Maercker et al
4th ALMA Science Conference on Revolution in Astronomy with ALMA: The Third Year, Tokyo, Japan, 8-11 December. Vol. 499, p. 319-322
Paper in proceedings
2015

First 230? GHz VLBI fringes on 3C 279 using the APEX Telescope (Research Note)

Jan Wagner, A. Roy, T.P. Krichbaum et al
Astronomy and Astrophysics. Vol. 581
Journal article
2015

The Circumstellar (CO)-C-12/(CO)-C-13 Ratio in AGB Stars of Different Chemical Type

Hans Olofsson, S. Ramstedt
Astronomical Society of the Pacific Conference Series: Conference on Why Galaxies Care About AGB Stars III: A Closer Look in Space and Time, Vienna, Austria, JUL 28-AUG 01, 2014. Vol. 497, p. 295-300
Paper in proceedings
2015

New observations and models of circumstellar CO line emission of AGB stars in the Herschel SUCCESS programme

Taissa Danilovich, D. Teyssier, Kay Justtanont et al
Astronomy and Astrophysics. Vol. 581
Journal article
2015

ALMA reveals sunburn: CO dissociation around AGB stars in the globular cluster 47 Tucanae

I. McDonald, A. Zijlstra, E. Lagadec et al
Monthly Notices of the Royal Astronomical Society. Vol. 453 (4), p. 4324-4336
Journal article
2015

A new 3 mm band receiver for the Onsala 20 m antenna

Victor Belitsky, Igor Lapkin, Mathias Fredrixon et al
Astronomy and Astrophysics. Vol. 580
Journal article
2015

Detailed Modelling of the Circumstellar Envelope of the S-type AGB Star W Aquilae

Taissa Danilovich, Per Bergman, Kay Justtanont et al
Why Galaxies Care About AGB Stars III: A Closer Look in Space and Time, Conference on Why Galaxies Care About AGB Stars III: A Closer Look in Space and Time, Vienna JUL 28-AUG 01, 2014. Vol. 497, p. 219-220
Paper in proceedings
2015

VLTI/MIDI Large Program: AGB Stars at Different Spatial Scales

C. Paladini, D. Klotz, M. Wittkowski et al
Conference on Why Galaxies Care About AGB Stars III: A Closer Look in Space and Time, Vienna, Austria, JUL 28-AUG 01, 2014. Vol. 497, p. 97-102
Paper in proceedings
2015

Detection of Cl line emission from the detached CO shell of the AGB star R Sculptoris

Hans Olofsson, Per Bergman, Michael Lindqvist
Astronomy and Astrophysics. Vol. 582, p. 8-
Journal article
2015

ALMA view of the circumstellar environment of the post-common-envelope-evolution binary system HD 101584

Hans Olofsson, Wouter Vlemmings, Matthias Maercker et al
Astronomy and Astrophysics. Vol. 576
Journal article
2014

The wonderful complexity of the Mira AB system

S. Ramstedt, S. Mohamed, Wouter Vlemmings et al
Astronomy and Astrophysics. Vol. 570, p. Art. no. L14-
Journal article
2014

The wind of W Hydrae as seen by Herschel I. The CO envelope

T. Khouri, A. de Koter, L. Decin et al
Astronomy and Astrophysics. Vol. 561, p. Article no. A5-
Journal article
2014

Detailed modelling of the circumstellar molecular line emission of the S-type AGB star W Aquilae

Taissa Danilovich, Per Bergman, Kay Justtanont et al
Astronomy and Astrophysics. Vol. 569, p. Art. no. A76-
Journal article
2014

The wind of W Hydrae as seen by Herschel II. The molecular envelope of W Hydrae

T. Khouri, A. de Koter, L. Decin et al
Astronomy and Astrophysics. Vol. 570, p. Art. no. A67-
Journal article
2014

Outflows from Binary AGB stars with ALMA

S. Ramstedt, Matthias Maercker, Wouter Vlemmings et al
Asymmetrical Planetary Nebulae VI conference, Proceedings of the conference held 4-8 November, 2013, p. 75-
Conference contribution
2013

HIFISTARS Herschel/HIFI observations of VY Canis Majoris. Molecular-line inventory of the envelope around the largest known star

J. Alcolea, V. Bujarrabal, P. Planesas et al
Astronomy and Astrophysics. Vol. 559, p. (article nr.) A93-
Journal article
2013

Swedish radio astronomy

Hans Olofsson
2013 7th European Conference on Antennas and Propagation, EuCAP 2013, p. 3152-3155
Paper in proceedings
2013

VLBI at APEX: First Fringes

Alan Roy, Jan Wagner, Michael Wunderlich et al
Proceedings of Science, 11th European VLBI Network Symposium & Users Meeting,, p. 1-6
Conference contribution
2013

LOFAR: The LOw-Frequency ARray

M. P. van Haarlem, M. W. Wise, A. W. Gunst et al
Astronomy and Astrophysics. Vol. 556 (August), p. article no. A2-
Journal article
2013

ALMA observations of the variable 12CO/13CO ratio around the asymptotic giant branch star R Sculptoris

Wouter Vlemmings, Matthias Maercker, Michael Lindqvist et al
Astronomy and Astrophysics. Vol. 556, p. Art. no. L1-
Journal article
2013

The wind of the M-type AGB star RT Virginis probed by VLTI/MIDI

S. Sacuto, S. Ramstedt, S. Höfner et al
Astronomy and Astrophysics. Vol. 551
Journal article
2013

The abundance of HCN in circumstellar envelopes of AGB stars of different chemical type

Fredrik Schöier, S. Ramstedt, Hans Olofsson et al
Astronomy and Astrophysics. Vol. 550
Journal article
2012

To be or not to be asymmetric? VLTI and the mass loss geometry of red giants

C. Paladini, D. Klotz, S. Sacuto et al
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8445, p. Art. no. 84451R-
Paper in proceedings
2012

Herschel/HIFI observations of red supergiants and yellow hypergiants I. Molecular inventory

D. Teyssier, G. Quintana-Lacaci, A. P. Marston et al
Astronomy and Astrophysics. Vol. 545, p. A99 (article no.)-
Journal article
2012

TWINKLING STARS The disappearing SiO masers of W Aql

S. Ramstedt, Wouter Vlemmings, S. Mohamed et al
Proceedings of the International Astronomical Union. Vol. 8 (S287), p. 206 - 261
Conference contribution
2012

Unexpectedly large mass loss during the thermal pulse cycle of the red giant star R Sculptoris

Matthias Maercker, S. Mohamed, Wouter Vlemmings et al
Nature. Vol. 490 (7419), p. 232-234
Journal article
2012

Herschel/HIFI observations of O-rich AGB stars: molecular inventory

Kay Justtanont, T. Khouri, Matthias Maercker et al
Astronomy and Astrophysics. Vol. 537, p. Article Number: A144 -
Journal article
2012

The geometry of the close environment of SV Piscium as probed by VLTI/MIDI

D. Klotz, S. Sacuto, F. Kerschbaum et al
Astronomy and Astrophysics. Vol. 541
Journal article
2012

LPVs as possible distance indicators in NGC147 and NGC185

D. Lorenz, T. Lebzelter, W. Nowotny et al
Astrophysics and Space Science Proceedings, p. 169-172
Paper in proceedings
2012

Herschel/HIFI observations of molecular emission in protoplanetary nebulae and young planetary nebulae

V. Bujarrabal, J. Alcolea, R. Soria-Ruiz et al
Astronomy and Astrophysics. Vol. 537, p. Article Number: A8-
Journal article
2011

The Mass-Loss Rates and Molecular Abundances of S-type AGB Stars

Sofia Ramstedt, Fredrik Schöier, Hans Olofsson
Proceedings from conference Why Galaxies Care about AGB stars II, in Vienna 16 - 20 August 2010; published in Astronomical Society of the Pacific conf series, vol 445. Vol. 445, p. 263-268
Conference contribution
2011

Observing pulsars and fast transients with LOFAR

B. W. Stappers, J. W. T. Hessels, A. Alexov et al
Astronomy and Astrophysics. Vol. 530
Journal article
2011

AGB Mass-Loss Characteristics: Rates, Temporal Variation, and Geometries

Fredrik Schöier, Sofia Ramstedt, Matthias Maercker et al
Proceedings from conference Why Galaxies Care about AGB stars II, in Vienna 16 - 20 August 2010; published in Astronomical Society of the Pacific conf series, vol 445. Vol. 445, p. 253-262
Conference contribution
2011

The Widespread Occurrence of Water Vapor in the Circumstellar Envelopes of Carbon-Rich Asymptotic Giant Branch Stars: First Results From a Survey With Herschel/HIFI

D. A. Neufeld, E. Gonzalez-Alfonso, G. J. Melnick et al
Astrophysical Journal Letters. Vol. 727 (2)
Journal article
2011

A Possible Solution to the Mass-Loss Problem in M-type AGB Stars

Hans Olofsson, Sofia Ramstedt, Stephane Sacuto et al
Proceedings from conference Why Galaxies Care about AGB stars II, in Vienna 16 - 20 August 2010; published in Astronomical Society of the Pacific conf series, vol 445. Vol. 445, p. 365-366
Conference poster
2011

Detection of interstellar hydrogen peroxide

Per Bergman, B. Parise, René Liseau et al
Astronomy and Astrophysics. Vol. 531, p. L8-
Journal article
2011

A HIFI View of Circumstellar H2O Emission from the S-type AGB Star X Cyg

Matthias Maercker, Fredrik Schöier, Kay Justtanont et al
Proceedings from conference Why Galaxies Care about AGB stars II, in Vienna 16 - 20 August 2010; published in Astronomical Society of the Pacific conf series, vol 445. Vol. 445, p. 613-617
Conference contribution
2011

Detached Shells of Dust and Gas around Carbon Stars

Matthias Maercker, Hans Olofsson, Kjell Eriksson et al
Proceedings from conference Why Galaxies Care about AGB stars II, in Vienna 16 - 20 August 2010; published in Astronomical Society of the Pacific conf series, vol 445. Vol. 445, p. 345-346
Conference poster
2011

Imaging the circumstellar dust around AGB stars with PolCor

S. Ramstedt, Matthias Maercker, G. Olofsson et al
Astronomy and Astrophysics. Vol. 531
Journal article
2011

Imaging the Circumstellar Dust Distribution around AGB Stars with the NOT/PolCor Instrument

Sofia Ramstedt, Matthias Maercker, G. Olofsson et al
Proceedings from conference Why Galaxies Care about AGB stars II, in Vienna 16 - 20 August 2010; published in Astronomical Society of the Pacific conf series, vol 445. Vol. 445, p. 367-368
Conference poster
2011

A Pilot Imaging Line Survey of RW LMi and IK Tau Using the Expanded Very Large Array

M. J. Claussen, Loránt Olivér Sjouwerman, M. P. Rupen et al
Astrophysical Journal Letters. Vol. 739 (1), p. L5-
Journal article
2011

Long-period variables in NGC 147 and NGC 185

D. Lorenz, T. Lebzelter, W. Nowotny et al
Astronomy and Astrophysics. Vol. 532
Journal article
2011

X Herculis and TX Piscium: two cases of ISM interaction with stellar winds observed by Herschel

A. Jorissen, A. Mayer, S. Van Eck et al
Astronomy and Astrophysics. Vol. 532
Journal article
2010

A HIFI preview of warm molecular gas around chi Cygni: first detection of H2O emission toward an S-type AGB star

Kay Justtanont, L. Decin, Fredrik Schöier et al
Astronomy and Astrophysics. Vol. 521 (1), p. Article Number: L6-
Journal article
2010

Polarisation observations of VY Canis Majoris H2O 532-441 620.701 GHz maser emission with HIFI

M. Harwit, M. Houde, P. Sonnentrucker et al
Astronomy and Astrophysics. Vol. 521 (1), p. Article Number: L51-
Journal article
2010

Discovery of water vapour in the carbon star V Cygni from observations with Herschel/HIFI

D. A. Neufeld, E. Gonzalez-Alfonso, G. J. Melnick et al
Astronomy and Astrophysics. Vol. 521 (1), p. Article Number: L5-
Journal article
2010

Water content and wind acceleration in the envelope around the oxygen-rich AGB star IK Tauri as seen by Herschel/HIFI

L. Decin, Kay Justtanont, Elvire De Beck et al
Astronomy and Astrophysics. Vol. 521 (1), p. Article Number: L4-
Journal article
2010

Herschel/HIFI deepens the circumstellar NH3 enigma

K. M. Menten, F. Wyrowski, J. Alcolea et al
Astronomy and Astrophysics. Vol. 521 (1), p. Article Number: L7-
Journal article
2010

High-resolution HST/ACS images of detached shells around carbon stars

Hans Olofsson, Matthias Maercker, K. Eriksson et al
Astronomy and Astrophysics. Vol. 515 (JUN 2010), p. A270-
Journal article
2010

The detached dust and gas shells around the carbon star U Antliae

Matthias Maercker, Hans Olofsson, K. Eriksson et al
Astronomy and Astrophysics. Vol. 511 (1), p. A37-
Journal article
2010

Herschel/HIFI observations of high-J CO transitions in the protoplanetary nebula CRL 618

V. Bujarrabal, J. Alcolea, R. Soria-Ruiz et al
Astronomy and Astrophysics. Vol. 521 (1), p. Article Number: L3-
Journal article
2010

Mapping the 12CO J = 1-0 and J = 2-1 emission in AGB and early post-AGB circumstellar envelopes. I. The COSAS program, first sample

A. Castro-Carrizo, G. Quintana-Lacaci, R. Neri et al
Astronomy and Astrophysics. Vol. 523 (4), p. A59-
Journal article
2010

APEX: Five years of operations

A. Lundgren, D. Rabanus, R. Güsten et al
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7737
Conference contribution
2009

Circumstellar molecular line emission from S-type AGB stars: mass-loss rates and SiO abundances

S. Ramstedt, Fredrik Schöier, Hans Olofsson
Astronomy and Astrophysics. Vol. 499 (2), p. 515-527
Journal article
2009

Evidence of triggered star formation in G327.3-0.6. Dust-continuum mapping of an infrared dark cloud with P-ArTéMiS

V. Minier, P. André, Per Bergman et al
Astronomy and Astrophysics. Vol. 501 (1), p. 1-4
Journal article
2009

Circumstellar water vapour in M-type AGB-stars: constraints from H2O(110-101) lines obtained with Odin

Matthias Maercker, Fredrik Schöier, Hans Olofsson et al
Astronomy and Astrophysics. Vol. 494, p. 243-252
Journal article
2009

CO in OH/IR stars close to the Galactic centre (Research Note)

Anders Winnberg, S. Deguchi, M.J. Reid et al
Astronomy and Astrophysics. Vol. 497, p. 177-181
Journal article
2009

The detached dust and gas shells around the carbon star U Ant

Matthias Maercker, Hans Olofsson, K. Eriksson et al
Preprint
2008

A Swedish heterodyne facility instrument for the APEX telescope

Vessen Vassilev, Denis Meledin, Igor Lapkin et al
Astronomy and Astrophysics. Vol. 490 (3), p. 1157-1163
Journal article
2008

Nb3Al thin film deposition for low-noise terahertz electronics

Dimitar Milkov Dochev, Alexey Pavolotskiy, Victor Belitsky et al
Journal of Physics : Conference Series. Vol. 97 (1), p. 012072 (6 pp.)-
Journal article
2008

Probing chemical processes in AGB stars

Fredrik Schöier, Hans Olofsson
in Proceedings of "Organic matter in space", Hong Kong Feb. 18-22, 2008, IAU symposium 251, eds. S. Kwok, S. Sandfjord, Cambridge University Press, p. 201-205
Conference contribution
2008

The study of evolved stars with ALMA

Hans Olofsson
Astrophysics and Space Science. Vol. 313 (1-3), p. 201-207
Journal article
2008

A circumstellar journey-physics and chemistry of AGB stellar winds

Hans Olofsson
Physica scripta. Topical Issues. Vol. T133 (014028)
Paper in proceedings
2008

Circumstellar H2O in M-type AGB stars

Matthias Maercker, Fredrik Schöier, Hans Olofsson
in Proceedings of "Organic Matter in Space", Hong Kong, Feb 18-22, 2008, IAU symposium 251, eds. S. Kwok, S. Sandford, Cambridge University Press, p. 163-164
Conference contribution
2008

Circumstellar water vapour in M-type AGB stars: radiative transfer models, abundances, and predictions for HIFI

Matthias Maercker, Fredrik Schöier, Hans Olofsson et al
Astronomy & Astrophysics. Vol. 479, p. 779-791
Journal article
2008

On the reliability of mass-loss-rate estimates for AGB stars

S. Ramstedt, Fredrik Schöier, Hans Olofsson et al
Astronomy & Astrophysics. Vol. 487, p. 645-657
Journal article
2008

MERLIN observations of OH/IR stars

Michael Lindqvist, Fredrik Schöier, Hans Olofsson et al
Proceedings of the 9th European VLBI Network Symposium on The role of VLBI in the Golden Age for Radio Astronomy and EVN Users Meeting., p. 81-83
Conference poster
2008

Organic Molecules in the spectral line survey of Orion KL with the Odin Satellite from 486-492 GHz and 541-577 GHz

N. Koning, S. Kwok, P. Bernath et al
in Proceedings of "Organic Matter in Space", Hong Kong Feb. 18-22, 2008, IAU symposium 251, eds. S. Kwok, S. Sandfjord, Cambridge University Press, p. 29-30
Conference contribution
2008

The study of evolved stars with ALMA

Hans Olofsson
Proceedings of "Science with the Atacama Large Millimeter Array", eds. R. Bachiller and J. Cernicharo, Madrid, 13-17 Nov. 2006, Springer, p. 201-207
Paper in proceedings
2008

Star Formation and Molecular Gas in M83

A.A. Lundgren, Hans Olofsson, Tommy Wiklind et al
Pathways Through an Eclectic Universe, Proc. of conf. April 2007 in Tenerife, Spain, Eds. J.H. Knapen, T.J. Mahoney, A. Vazdekis, ASP Conference Series, San Francisco. Vol. 390, p. 144-
Conference contribution
2008

The physics and chemistry of circumstellar envelopes of S-stars on the AGB

S. Ramstedt, Fredrik Schöier, Hans Olofsson
in Proceedings of "Organic Matter in Space", Hong Kong feb. 18-22, 2008, IAU symposium 251, eds. S. Kwok, S. Sandfjord, Cambridge University Press, p. 167-168
Conference contribution
2007

Facility Heterodyne Receiver for the Atacama Pathfinder Experiment Telescope

Victor Belitsky, Igor Lapkin, Vessen Vassilev et al
Proceedings of Joint 32nd International Conference on Infrared Millimeter Waves and 15th International conference on Terahertz Electronics, Sept 3-7, 2007, City Hall, Cardiff, Wales, UK, p. 326-328
Paper in proceedings
2007

The Physics and Chemistry of Circumstellar Envelopes of S Stars on the AGB

S. Ramstedt, F.L. Schöier, Hans Olofsson
Proceedings of " Why galaxies care about stars: their importance as actors and probes", eds. F. Kerschbaum, C. Charbonnel and R.F. Wing, Vienna, August 2006, ASP Conference Series. Vol. 378, p. 335-336
Conference contribution
2007

The abundance of SiS in circumstellar envelopes around AGB stars

Fredrik Schöier, J. Bast, Hans Olofsson et al
Astronomy & Astrophysics. Vol. 473, p. 871-882
Journal article
2007

Molecular oxygen in the p Ophiuchi cloud

B. Larsson, René Liseau, L. Pagani et al
Astronomy & Astrophysics. Vol. 466, p. 999-1003
Journal article
2007

Nb3Al thin film deposition for low-noise terahertz electronics

Dimitar Milkov Dochev, Alexey Pavolotskiy, Victor Belitsky et al
8th European Conference on Applied Superconductivity
Conference poster
2007

Non-Equilibrium Chemistry and Dust Formation in AGB Stars as Probed by SiO Line Emission

F.L. Schöier, Hans Olofsson, T. Wong et al
Proceedings of "Why galaxies care about stars: their importance as actors and probes", eds. F. Kerschbaum, C. Charbonnel and R.F. Wing, Vienna, August 2006, ASP Conference Series. Vol. 378, p. 341-342
Conference contribution
2007

Modelling of Circumstellar H2O Line Emission from M-type AGB Stars

Matthias Maercker, F.L. Schöier, Hans Olofsson et al
Proceedings of "Why galaxies care about AGB stars: their importance as actors and probes", eds. F. Kerschbaum, C. Charbonnel and R.F. Wing, Vienna, August 2006, ASP Conference Series. Vol. 378, p. 317-318
Conference contribution
2006

Molecular Abundandances in AGB Circumstellar Envelopes

Hans Olofsson
Astrochemistry: Recent successes and current challenges, Proc. of the 231st symposium of the IAU, Pacific Grove, California, Aug-Sept 2005, p. 499-507
Conference contribution
2006

Mass-loss properties of S-stars on the AGB

S. Ramstedt, F.L. Schöier, Hans Olofsson et al
Astronomy & Astrophysics. Vol. 454, p. L103-L106
Journal article
2006

A 0.8 mm heterodyne facility receiver for the APEX telescope

Christophe Risacher, Vessen Vassilev, Raquel Monje et al
Astronomy & Astrophysics. Vol. 454, p. L17-L20
Journal article
2006

The circumstellar environment of asymptotic giant branch stars

Hans Olofsson
Astronomische Gesellschaft: Reviews in Modern Astronomy. The many facets of the Universe - Revelation by New Instruments, ed. S. Röser, Wiley-VCH. Vol. 19, p. 75-
Book chapter
2006

The distribution of SiO in the circumstellar envelope around IRC+10216

F. Schöier, D. Fong, Hans Olofsson et al
The Astrophysical Journal. Vol. 649, p. 965-972
Journal article
2006

SiO in C-rich circumstellar envelopes of AGB stars: effects of non-LTE chemistry and grain adsorption

F.L. Schöier, Hans Olofsson, A.A. Lundgren
Astronomy & Astrophysics. Vol. 454, p. 247-255
Journal article
2006

Observations of the Circumstellar Water 110-->101 and Ammonia 10-->00 Lines in IRC +10216 by the Odin Satellite

T.I. Hasegawa, S. Kwok, N. Koning et al
The Astrophysical Journal. Vol. 637, p. 791-797
Journal article
2006

Circumstellar CO in OH/IR Stars Close to the Galactic Centre

Anders Winnberg, S. Deguchi, H.J. Habing et al
J. Physics: Conference Series. Vol. 54, p. 166-170
Conference contribution
2005

Molecules in bipolar proto-planetary nebulae

P.M. Woods, L.-Å. Nyman, F. Schöier et al
Astronomy & Astrophysics. Vol. 429 (3), p. 977-992
Journal article

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Showing 3 research projects

2015–2018

Late evolution of solar-type stars

Hans Olofsson Astronomy and Plasmaphysics
Swedish Research Council (VR)

2012–2014

The extra-ordinary deaths of ordinary stars

Hans Olofsson Radio Astronomy and Astrophysics
Swedish Research Council (VR)

2009–2012

Advanced Radio Astronomy in Europe (RADIONET-FP7)

Hans Olofsson Galactic Astrophysics
European Commission (FP7)

9 publications exist
There might be more projects where Hans Olofsson participates, but you have to be logged in as a Chalmers employee to see them.