University of Oulu

Nikki Zabel, Timothy A Davis, Matthew W L Smith, Natasha Maddox, George J Bendo, Reynier Peletier, Enrichetta Iodice, Aku Venhola, Maarten Baes, Jonathan I Davies, Ilse de Looze, Haley Gomez, Marco Grossi, Jeffrey D P Kenney, Paolo Serra, Freeke van de Voort, Catherine Vlahakis, Lisa M Young; The ALMA Fornax Cluster Survey I: stirring and stripping of the molecular gas in cluster galaxies, Monthly Notices of the Royal Astronomical Society, Volume 483, Issue 2, 21 February 2019, Pages 2251–2268, https://doi.org/10.1093/mnras/sty3234

The ALMA Fornax Cluster Survey I : stirring and stripping of the molecular gas in cluster galaxies

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Author: Zabel, Nikki1; Davis, Timothy A.1; Smith, Matthew W. L.1;
Organizations: 1School of Physics and Astronomy, Cardiff University, Queen’s Building, The Parade, Cardiff CF24 3AA, Wales, UK
2ASTRON, the Netherlands Institute for Radio Astronomy, Oude Hoogeveensedijk 4, NL-7991 PD Dwingeloo, The Netherland
3Faculty of Physics, Ludwig-Maximilians-Universität, Scheinerstr. 1, D- 81679 Munich, Germany
4UK ALMA Regional Centre Node, Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Oxford Road, Manchester M13 9PL, UK
5Kapteyn Astronomical Institute, University of Groningen, PO Box 72, NL- 9700 AB Groningen, The Netherlands
6INAF-Astronomical Observatory of Capodimonte, via Moiariello 16, Naples I-80131, Italy
7Astronomy Research Unit, University of Oulu, FI-90014 Oulu, Finland
8Sterrenkundig Observatorium, Department of Physics and Astronomy, Uni- versiteit Gent, Krijgslaan 281 S9, B-9000 Gent, Belgium
9Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
10Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B- 9000 Gent, Belgium
11Institute of Astronomy, University of Cambridge, Madingley Road, Cam- bridge CB3 0HA, UK
12Observatório do Valongo, Universidade Federal do Rio de Janeiro, Ladeira Pedro Antônio 43, 20080-090 Rio de Janeiro, RJ, Brazil
13Astronomy Department, Yale University, P.O. Box 208101, New Haven, CT 06520-8101, USA
14INAF - Osservatorio Astronomico di Cagliari, Via della Scienza 5, I-09047 Selargius (CA), Italy
15Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, D-69118 Heidelberg, Germany
16Astronomy Department, Yale University, PO Box 208101, New Haven, CT 06520-8101, USA
17National Radio Astronomy Observatory, 520 Edgemont Road, Char- lottesville, VA 22903-2475, USA
18Physics Department, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801, USA
19National Radio Astronomy Observatory, Socorro, NM 87801, USA
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3.2 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe201902226040
Language: English
Published: Oxford University Press, 2019
Publish Date: 2019-02-22
Description:

Abstract

We present the first results of the ALMA Fornax Cluster Survey: a complete ALMA survey of all members of the Fornax galaxy cluster that were detected in H i or in the far-infrared with Herschel. The sample consists of a wide variety of galaxy types, ranging from giant ellipticals to spiral galaxies and dwarfs, located in all (projected) areas of the cluster. It spans a mass range of 10∼8.5–11 M. The CO(1–0) line was targeted as a tracer for the cold molecular gas, along with the associated 3 mm continuum. CO was detected in 15 of the 30 galaxies observed. All 8 detected galaxies with stellar masses below 3 × 109 M have disturbed molecular gas reservoirs; only 7 galaxies are regular/undisturbed. This implies that Fornax is still a very active environment, having a significant impact on its members. Both detections and non-detections occur at all projected locations in the cluster. Based on visual inspection, and the detection of molecular gas tails in alignment with the direction of the cluster centre, in some cases ram pressure stripping is a possible candidate for disturbing the molecular gas morphologies and kinematics. Derived gas fractions in almost all galaxies are lower than expected for field objects with the same mass, especially for the galaxies with disturbed molecular gas, with differences of sometimes more than an order of magnitude. The detection of these disturbed molecular gas reservoirs reveals the importance of the cluster environment for even the tightly bound molecular gas phase.

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Series: Monthly notices of the Royal Astronomical Society
ISSN: 0035-8711
ISSN-E: 1365-8711
ISSN-L: 0035-8711
Volume: 483
Issue: 2
Pages: 2251 - 2268
DOI: 10.1093/mnras/sty3234
OADOI: https://oadoi.org/10.1093/mnras/sty3234
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
Subjects:
Funding: This publication has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 730562 [RadioNet]. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 679627; project name FORNAX). NZ acknowledges support from the European Research Council (ERC) in the form of Consolidator Grant CosmicDust (ERC-2014-CoG-647939) TAD acknowledges support from a Science and Technology Facilities Council Ernest Rutherford Fellowship. FvdV is supported by the Klaus Tschira Foundation. R.F.P. acknowledges financial support from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 721463 to the SUNDIAL ITN network.
Copyright information: © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. The version of record Nikki Zabel, Timothy A Davis, Matthew W L Smith, Natasha Maddox, George J Bendo, Reynier Peletier, Enrichetta Iodice, Aku Venhola, Maarten Baes, Jonathan I Davies, Ilse de Looze, Haley Gomez, Marco Grossi, Jeffrey D P Kenney, Paolo Serra, Freeke van de Voort, Catherine Vlahakis, Lisa M Young; The ALMA Fornax Cluster Survey I: stirring and stripping of the molecular gas in cluster galaxies, Monthly Notices of the Royal Astronomical Society, Volume 483, Issue 2, 21 February 2019, Pages 2251–2268 is available onlinehttps://doi.org/10.1093/mnras/sty3234.