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Inflow of atomic gas fuelling star formation

Published online by Cambridge University Press:  27 October 2016

M. J. Michałowski ,
G. Gentile ,
J. Hjorth ,
M. R. Krumholz ,
N. R. Tanvir ,
P. Kamphuis ,
D. Burlon ,
M. Baes ,
S. Basa  and
S. Berta
...Show all authors
M. J. Michałowski
Affiliation:
Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh, UK
G. Gentile
Affiliation:
Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281-S9, 9000, Gent, Belgium Department of Physics and Astrophysics, Vrije Universiteit Brussel, Pleinlaan 2, Belgium
J. Hjorth
Affiliation:
Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Denmark
M. R. Krumholz
Affiliation:
Department of Astronomy and Astrophysics, University of California, Santa Cruz, USA
N. R. Tanvir
Affiliation:
Department of Physics and Astronomy, University of Leicester, UK
P. Kamphuis
Affiliation:
CSIRO Astronomy & Space Science, Australia Telescope National Facility, Epping, Australia
D. Burlon
Affiliation:
Sydney Institute for Astronomy, School of Physics, The University of Sydney, Australia
M. Baes
Affiliation:
Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281-S9, 9000, Gent, Belgium
S. Basa
Affiliation:
Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), France
S. Berta
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstraße, Garching, Germany
J. M. Castro Cerón
Affiliation:
ISDEFE for the Herschel Science Centre (ESA-ESAC), Villanueva de la Cañada, Spain
D. Crosby
Affiliation:
Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh, UK
V. D'Elia
Affiliation:
ASI-Science Data Center, Via del Politecnico snc, Rome, Italy INAF - Osservatorio Astronomico di Roma, Via di Frascati, Monteporzio Catone, Italy
J. Elliott
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstraße, Garching, Germany
J. Greiner
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstraße, Garching, Germany
L. K. Hunt
Affiliation:
INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, Firenze, Italy
S. Klose
Affiliation:
Thüringer Landessternwarte Tautenburg, Sternwarte 5, Tautenburg, Germany
M. P. Koprowski
Affiliation:
Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh, UK
E. Le Floc'h
Affiliation:
Laboratoire AIM-Paris-Saclay, CEA, France
D. Malesani
Affiliation:
Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Denmark
T. Murphy
Affiliation:
Sydney Institute for Astronomy, School of Physics, The University of Sydney, Australia
A. Nicuesa Guelbenzu
Affiliation:
Thüringer Landessternwarte Tautenburg, Sternwarte 5, Tautenburg, Germany
E. Palazzi
Affiliation:
INAF-IASF Bologna, Via Gobetti 101, Bologna, Italy
J. Rasmussen
Affiliation:
Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Denmark Technical University of Denmark, Department of Physics, Kgs. Lyngby, Denmark
A. Rossi
Affiliation:
Thüringer Landessternwarte Tautenburg, Sternwarte 5, Tautenburg, Germany INAF-IASF Bologna, Via Gobetti 101, Bologna, Italy
S. Savaglio
Affiliation:
Physics Department, University of Calabria, via P. Bucci, Arcavacata di Rende, Italy European Southern Observatory, Karl-Schwarzschild-Str. 2, Garching, Germany
P. Schady
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstraße, Garching, Germany
A. de Ugarte Postigo
Affiliation:
Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Denmark Instituto de Astrofísica de Andalucía (IAA-CSIC), Granada, Spain
D. Watson
Affiliation:
Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Denmark
P. van der Werf
Affiliation:
Leiden Observatory, Leiden University, Leiden, The Netherlands
S. D. Vergani
Affiliation:
GEPI-Observatoire de Paris Meudon. 5 Place Jules Jannsen, Meudon, France INAF/Osservatorio Astronomico di Brera, via Emilio Bianchi 46, Merate (LC), Italy
D. Xu
Affiliation:
Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Denmark
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Abstract

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Gamma-ray burst host galaxies are deficient in molecular gas, and show anomalous metal-poor regions close to GRB positions. Using recent Australia Telescope Compact Array (ATCA) Hi observations we show that they have substantial atomic gas reservoirs. This suggests that star formation in these galaxies may be fuelled by recent inflow of metal-poor atomic gas. While this process is debated, it can happen in low-metallicity gas near the onset of star formation because gas cooling (necessary for star formation) is faster than the Hi-to-H2 conversion.

Keywords

galaxies: ISMgalaxies: formationgamma rays: burstsradio lines: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , General Assembly A29B: Astronomy in Focus , August 2015 , pp. 229 - 230
Copyright
Copyright © International Astronomical Union 2016 

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