Fredrik Schöier

Visar 38 publikationer

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
Artikel i vetenskaplig tidskrift
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-
Artikel i vetenskaplig tidskrift
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
Artikel i vetenskaplig tidskrift
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.)-
Artikel i vetenskaplig tidskrift
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 -
Artikel i vetenskaplig tidskrift
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-
Artikel i vetenskaplig tidskrift
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
2011

A chemical inventory of the S-type AGB star chi Cygni based on Herschel/HIFI observations of circumstellar line emission The importance of non-LTE chemical processes in a dynamical region

Fredrik Schöier, Matthias Maercker, Kay Justtanont et al
Astronomy and Astrophysics. Vol. 530
Artikel i vetenskaplig tidskrift
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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)
Artikel i vetenskaplig tidskrift
2011

Herschel/HIFI Observations of IRC+10216: Water Vapor in the Inner Envelope of a Carbon-Rich Asymptotic Giant Branch Star

D. A. Neufeld, E. Gonzalez-Alfonso, G. J. Melnick et al
Astrophysical Journal Letters. Vol. 727 (2)
Artikel i vetenskaplig tidskrift
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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
Poster (konferens)
2011

Imaging the circumstellar dust around AGB stars with PolCor

S. Ramstedt, Matthias Maercker, G. Olofsson et al
Astronomy and Astrophysics. Vol. 531
Artikel i vetenskaplig tidskrift
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
Poster (konferens)
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-
Artikel i vetenskaplig tidskrift
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-
Artikel i vetenskaplig tidskrift
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-
Artikel i vetenskaplig tidskrift
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-
Artikel i vetenskaplig tidskrift
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-
Artikel i vetenskaplig tidskrift
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-
Artikel i vetenskaplig tidskrift
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-
Artikel i vetenskaplig tidskrift
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-
Artikel i vetenskaplig tidskrift
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-
Artikel i vetenskaplig tidskrift
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-
Artikel i vetenskaplig tidskrift
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
Artikel i vetenskaplig tidskrift
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
Artikel i vetenskaplig tidskrift
2009

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

Matthias Maercker, Hans Olofsson, K. Eriksson et al
Preprint
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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
Artikel i vetenskaplig tidskrift
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
Artikel i vetenskaplig tidskrift
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
Poster (konferens)
2008

The 1 mm spectrum of VY Canis Majoris: Chemistry in an O-rich envelope

E.D. Tenenbaum, S.N. Milam, A.J. Apponi 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. 171-172
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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
Artikel i vetenskaplig tidskrift
2007

The Distribution of H13CN in the Circumstellar Envelope around IRC+10216

Fredrik Schöier, D. Fong, J.H. Bieging et al
The Astrophysical Journal. Vol. 670 (1), p. 766-773
Artikel i vetenskaplig tidskrift
2005

An atomic and molecular database for analysis of submillimetre line observations

Fredrik Schöier, Floris F. S. van der Tak, E. F. van Dishoeck et al
Astronomy and Astrophysics. Vol. 432, p. 369-379
Artikel i vetenskaplig tidskrift

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