Per Bjerkeli

Senior Researcher at Astronomy and Plasmaphysics

Per Bjerkeli is part of the the unit of Galactic Astronomy, under the division for Astronomy and Plasma Physics. His research interests are mainly in the field of star- and planet formation, with focus on molecular outflows and the initial conditions for planet formation. Per’s research is funded by a grant from the Swedish Research Council (Vetenskapsrådet).

Source: chalmers.se
Image of Per Bjerkeli

Showing 55 publications

2024

The asymmetric bipolar [Fe II] jet and H<inf>2</inf> outflow of TMC1A resolved with the JWST NIRSpec Integral Field Unit

K. D. Assani, D. Harsono, Jon P Ramsey et al
Astronomy and Astrophysics. Vol. 688
Journal article
2024

Post-outburst chemistry in a Very Low-Luminosity Object: Peculiar high abundance of nitric oxide

B. M. Kulterer, S. F. Wampfler, N. F W Ligterink et al
Astronomy and Astrophysics. Vol. 691
Journal article
2023

Possible episodic infall towards a compact disk in B335

Per Bjerkeli, Jon P Ramsey, D. Harsono et al
Astronomy and Astrophysics. Vol. 677
Journal article
2023

JWST Peers into the Class I Protostar TMC1A: Atomic Jet and Spatially Resolved Dissociative Shock Region

D. Harsono, Per Bjerkeli, Jon P Ramsey et al
Astrophysical Journal Letters. Vol. 951 (2)
Journal article
2023

Linking ice and gas in the Coronet cluster in Corona Australis

G. Perotti, J. K. Jorgensen, W. R.M. Rocha et al
Astronomy and Astrophysics. Vol. 678
Journal article
2022

Emission from HCN and CH3OH in comets Onsala 20-m observations and radiative transfer modelling

Per Bergman, Mikael Lerner, Henrik Olofsson et al
Astronomy and Astrophysics. Vol. 660
Journal article
2022

Tracing the large-scale magnetic field morphology in protoplanetary disks using molecular line polarization

Boy Lankhaar, Wouter Vlemmings, Per Bjerkeli
Astronomy and Astrophysics. Vol. 657
Journal article
2021

Water in star-forming regions: Physics and chemistry from clouds to disks as probed by Herschel spectroscopy

E. F. van Dishoeck, L. E. Kristensen, J. C. Mottram et al
Astronomy and Astrophysics. Vol. 648
Journal article
2021

Linking ice and gas in the λ Orionis Barnard 35A cloud

G. Perotti, J. K. Jørgensen, H. J. Fraser et al
Astronomy and Astrophysics. Vol. 650
Journal article
2021

Resolved molecular line observations reveal an inherited molecular layer in the young disk around TMC1A

D. Harsono, M. H. D. van der Wiel, Per Bjerkeli et al
Astronomy and Astrophysics. Vol. 646
Journal article
2020

Effect of the 3D distribution on water observations made with the SWI: I. Ganymede

Eva Wirström, Per Bjerkeli, L. Rezac et al
Astronomy and Astrophysics. Vol. 637
Journal article
2020

Resolving star and planet formation with ALMA

Per Bjerkeli, D. Harsono, M. H. D. van der Wiel et al
Proceedings of the International Astronomical Union. Vol. 14, p. 106-110
Paper in proceeding
2019

The ALMA-PILS survey: gas dynamics in IRAS 16293-2422 and the connection between its two protostars

M. H. D. van der Wiel, S. K. Jacobsen, J. K. Jorgensen et al
Astronomy and Astrophysics. Vol. 626
Journal article
2019

Kinematics around the B335 protostar down to au scales

Per Bjerkeli, Jon P Ramsey, Daniel Harsono et al
Astronomy and Astrophysics. Vol. 631
Journal article
2019

The ALMA-PILS survey: propyne (CH3CCH) in IRAS 16293–2422

Hannah Calcutt, E. R. Willis, J. K. Jorgensen et al
Astronomy and Astrophysics. Vol. 631
Journal article
2018

Evidence for the start of planet formation in a young circumstellar disk

D. Harsono, Per Bjerkeli, M. H. D. van der Wiel et al
Nature Astronomy. Vol. 2 (8), p. 646-651
Other text in scientific journal
2018

The ALMA-PILS survey: The sulphur connection between protostars and comets: IRAS 16293-2422 B and 67P/Churyumov-Gerasimenko

M. N. Drozdovskaya, E. F. van Dishoeck, J. K. Jorgensen et al
Monthly Notices of the Royal Astronomical Society. Vol. 476 (4), p. 4949-4964
Journal article
2017

EXTERNALLY HEATED PROTOSTELLAR CORES in the OPHIUCHUS STAR-FORMING REGION

Johan E. Lindberg, S. B. Charnley, J. K. Jorgensen et al
Astrophysical Journal. Vol. 835 (1), p. 3-
Journal article
2017

Protostellar and cometary detections of organohalogens

E. C. Fayolle, K. I. Öberg, J. K. Jorgensen et al
Nature Astronomy. Vol. 1 (10), p. 703-708
Journal article
2017

The ALMA-PILS survey: First detections of ethylene oxide, acetone and propanal toward the low-mass protostar IRAS 16293-2422

J. M. Lykke, A. Coutens, J. K. Jorgensen et al
Astronomy and Astrophysics. Vol. 597, p. A53-
Journal article
2016

The ALMA Protostellar Interferometric Line Survey (PILS) First results from an unbiased submillimeter wavelength line survey of the Class 0 protostellar binary IRAS 16293-2422 with ALMA

J. K. Jorgensen, M. H. D. van der Wiel, A. Coutens et al
Astronomy and Astrophysics. Vol. 595, p. Art no A117-
Journal article
2016

A young bipolar outflow from IRAS 15398-3359

Per Bjerkeli, J. K. Jorgensen, C. Brinch
Astronomy and Astrophysics. Vol. 587
Journal article
2016

Water around IRAS 15398-3359 observed with ALMA

Per Bjerkeli, J. K. Jorgensen, E. A. Bergin et al
Astronomy and Astrophysics. Vol. 595, p. Art no A39-
Journal article
2016

The ALMA-PILS survey: First detections of deuterated formamide and deuterated isocyanic acid in the interstellar medium

A. Coutens, J. K. Jorgensen, M. H. D. van der Wiel et al
Astronomy and Astrophysics. Vol. 590
Journal article
2016

Resolved images of a protostellar outflow driven by an extended disk wind.

Per Bjerkeli, M. H. D. van der Wiel, D. Harsono et al
Nature. Vol. 540 (7633), p. 406-409
Journal article
2014

Water distribution in shocked regions of the NGC 1333-IRAS 4A protostellar outflow

G. Santangelo, B. Nisini, C. Codella et al
Astronomy and Astrophysics. Vol. 568, p. Article no. A125-
Journal article
2014

Resolving the shocked gas in HH 54 with Herschel. CO line mapping at high spatial and spectral resolution

Per Bjerkeli, René Liseau, C. Brinch et al
Astronomy and Astrophysics. Vol. 571, p. A90-
Journal article
2014

First spectrally-resolved H-2 observations towards HH 54 Low H2O abundance in shocks

G. Santangelo, S. Antoniucci, B. Nisini et al
Astronomy and Astrophysics. Vol. 569, p. Art. no. L8-
Journal article
2013

Physical properties of outflows Comparing CO- and H2O-based parameters in Class 0 sources

Per Bjerkeli, René Liseau, B. Nisini et al
Astronomy and Astrophysics. Vol. 552
Journal article
2013

Mapping water in protostellar outflows with Herschel PACS and HIFI observations of L1448-C

B. Nisini, G. Santangelo, S. Antoniucci et al
Astronomy and Astrophysics. Vol. 549
Journal article
2012

Multi-line detection of O2 toward rho Ophiuchi A

René Liseau, P. F. Goldsmith, B. Larsson et al
Astronomy and Astrophysics. Vol. 541
Journal article
2012

H2O line mapping at high spatial and spectral resolution Herschel observations of the VLA 1623 outflow

Per Bjerkeli, René Liseau, B. Larsson et al
Astronomy and Astrophysics. Vol. 546, p. Article Number: A29 -
Journal article
2012

In-orbit performance of Herschel-HIFI

P. R. Roelfsema, F. P. Helmich, D. Teyssier et al
Astronomy and Astrophysics. Vol. 537, p. Article Number: A17 -
Journal article
2011

Water in Star-forming Regions with the Herschel Space Observatory (WISH). I. Overview of Key Program and First Results

E. F. van Dishoeck, L. Kristensen, A. O. Benz et al
Publications of the Astronomical Society of the Pacific. Vol. 123 (900), p. 138-170
Journal article
2011

Herschel observations of the Herbig-Haro objects HH52-54

Per Bjerkeli, René Liseau, B. Nisini et al
Astronomy and Astrophysics. Vol. 533
Journal article
2010

Origin of the hot gas in low-mass protostars Herschel-PACS spectroscopy of HH 46

T. A. van Kempen, L. Kristensen, G. J. Herczeg et al
Astronomy and Astrophysics. Vol. 518 (Article Number: L121)
Journal article
2010

Hydrides in young stellar objects: Radiation tracers in a protostar-disk-outflow system

A. O. Benz, S. Bruderer, E. F. van Dishoeck et al
Astronomy and Astrophysics. Vol. 521 (1), p. L35+-
Journal article
2010

Water vapor toward starless cores: The Herschel view

P. Caselli, E. Keto, L. Pagani et al
Astronomy and Astrophysics. Vol. 521 (1)
Journal article
2010

Water in massive star-forming regions: HIFI observations of W3 IRS5

L. Chavarría, F. Herpin, T. Jacq et al
Astronomy and Astrophysics. Vol. 521 (1), p. L37+-
Journal article
2010

Water in low-mass star-forming regions with Herschel. HIFI spectroscopy of NGC 1333

L. Kristensen, R. Visser, E. F. van Dishoeck et al
Astronomy and Astrophysics. Vol. 521 (1), p. Art. Nr. L30-
Journal article
2010

Herschel-PACS spectroscopy of the intermediate mass protostar NGC 7129 FIRS 2

M. Fich, D. Johnstone, T. A. van Kempen et al
Astronomy and Astrophysics. Vol. 518 (Article Number: L86)
Journal article
2010

Herschel/HIFI detections of hydrides towards AFGL 2591 Envelope emission versus tenuous cloud absorption

S. Bruderer, A. O. Benz, E. F. van Dishoeck et al
Astronomy and Astrophysics. Vol. 521 (1)
Journal article
2010

Sensitive limits on the abundance of cold water vapor in the DM Tauri protoplanetary disk

E. A. Bergin, M. R. Hogerheijde, C. Brinch et al
Astronomy and Astrophysics. Vol. 521 (1), p. L33+-
Journal article
2010

Water abundance variations around high-mass protostars: HIFI observations of the DR21 region

F. F. S. van der Tak, M. G. Marseille, F. Herpin et al
Astronomy and Astrophysics. Vol. 518 (Article Number: L107)
Journal article
2010

Herschel observations of the hydroxyl radical (OH) in young stellar objects

S. F. Wampfler, G. J. Herczeg, S. Bruderer et al
Astronomy and Astrophysics. Vol. 521 (1), p. Art. Nr. L36-
Journal article
2010

Water abundances in high-mass protostellar envelopes: Herschel observations with HIFI

M. G. Marseille, F. F. S. van der Tak, F. Herpin et al
Astronomy and Astrophysics. Vol. 521 (1), p. L32+-
Journal article
2010

Water cooling of shocks in protostellar outflows Herschel-PACS map of L1157

B. Nisini, M. Benedettini, C. Codella et al
Astronomy and Astrophysics. Vol. 518 (Article Number: L120)
Journal article
2010

Herschel/HIFI spectroscopy of the intermediate mass protostar NGC 7129 FIRS 2

D. Johnstone, M. Fich, C. McCoey et al
Astronomy and Astrophysics. Vol. 521 (1), p. L41+-
Journal article
2010

Herschel/HIFI observations of high-J CO lines in the NGC 1333 low-mass star-forming region

U. A. Yildiz, E. F. van Dishoeck, L. Kristensen et al
Astronomy and Astrophysics. Vol. 521 (1), p. L40+-
Journal article
2010

Variations in H2O+/H2O ratios toward massive star-forming regions

F. Wyrowski, F. F. S. van der Tak, F. Herpin et al
Astronomy and Astrophysics. Vol. 521 (1), p. L34+-
Journal article
2009

Odin observations of water in molecular outflows and shocks

Per Bjerkeli, René Liseau, Michael Olberg et al
Astronomy and Astrophysics. Vol. 507 (3), p. 1455-1466
Journal article
2008

Stars and gas in the Medusa merger

E. Manthey, S. Hüttemeister, Susanne Aalto et al
Astronomy & Astrophysics. Vol. 490, p. 975-987
Journal article

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Showing 5 research projects

2019–

Protostellar Interferometric Line Survey (PILS)

Hannah Calcutt Galactic Astrophysics
Per Bjerkeli Galactic Astrophysics
European Research Council (ERC)

12 publications exist
2016–

Young Outflows and Disks with ALMA (YODA)

Per Bjerkeli Galactic Astrophysics
Hannah Calcutt Galactic Astrophysics
Swedish Research Council (VR)

2015–2016

From the beginning to the end of planetary systems: their birth, life and death

René Liseau Galactic Astrophysics
Kay Justtanont Galactic Astrophysics
Wouter Vlemmings Galactic Astrophysics
Per Bjerkeli Galactic Astrophysics
Michael Olberg Onsala Space Observatory
Swedish National Space Board

2013–2016

Star formation with ALMA: Outflows, infall and chemistry in the inner regions around protostars

Susanne Aalto Radio Astronomy and Astrophysics
Per Bjerkeli Radio Astronomy and Astrophysics
Swedish Research Council (VR)

2 publications exist
2012–2014

Key-Programmes with Herschel. The circle of Stellar life

René Liseau Radio Astronomy and Astrophysics
Taissa Danilovich Radio Astronomy and Astrophysics
Per Bjerkeli Radio Astronomy and Astrophysics
Joachim Wiegert Radio Astronomy and Astrophysics
Swedish National Space Board

There might be more projects where Per Bjerkeli participates, but you have to be logged in as a Chalmers employee to see them.