University of Oulu

N Zabel, T A Davis, M Sarzi, Boris Nedelchev, M Chevance, J M Diederik Kruijssen, E Iodice, M Baes, G J Bendo, E Maria Corsini, I De Looze, P Tim de Zeeuw, D A Gadotti, M Grossi, R Peletier, F Pinna, Paolo Serra, F van de Voort, A Venhola, S Viaene, C Vlahakis, AlFoCS + Fornax3D: resolved star formation in the Fornax cluster with ALMA and MUSE, Monthly Notices of the Royal Astronomical Society, Volume 496, Issue 2, August 2020, Pages 2155–2182,

AlFoCS + Fornax3D : resolved star formation in the Fornax cluster with ALMA and MUSE

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Author: Zabel, N.1; Davis, T. A.1; Sarzi, M.2;
Organizations: 1School of Physics and Astronomy, Cardiff University , Queen’s Building, The Parade, Cardiff CF24 3AA, UK
2Armagh Observatory and Planetarium , College Hill, Armagh BT61 9DG, UK
3Astronomisches Rechen-Institut , Zentrum für Astronomie der Universität Heidelberg, Mönchhofstraße 12-14, D-69120 Heidelberg, Germany
4INAF-Osservatorio Astronomico di Capodimonte , via Moiariello 16, I-80131 Napoli, Italy
5Sterrenkundig Observatorium, Universiteit Gent , Krijgslaan 281 S9, B-9000 Gent, Belgium
6UK ALMA Regional Centre Node, Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester , Oxford Road, Manchester M13 9PL, UK
7Dipartimento di Fisica e Astronomia ‘G. Galilei’, Università di Padova , vicolo dell’Osservatorio 3, I-35122 Padova, Italy
8INAF-Osservatorio Astronomico di Padova , vicolo dell’Osservatorio 5, I-35122 Padova, Italy
9Sterrenkundig Observatorium, Universiteit Gent , Krijgslaan 281 S9, B-9000 Gent, Belgium Department of Physics and Astronomy, University College London , Gower Street, London WC1E 6BT, UK
10Sterrewacht Leiden, Leiden University , Postbus 9513, NL-2300 RA Leiden, the Netherlands
11Max-Planck-Institut für extraterrestrische Physik , Giessenbachstraße, D-85741 Garching bei Muenchen, Germany
12European Southern Observatory , Karl-Schwarzschild-Straße 2, D-85748 Garching bei München, Germany
13Observatório do Valongo, Universidade Federal do Rio de Janeiro , Ladeira Pedro Antônio 43, 20080-090 Rio de Janeiro, Brazil
14Kapteyn Astronomical Institute, University of Groningen , PO Box 72, NL-9700 AB Groningen, the Netherlands
15Max-Planck-Institut für Astronomie , Königstuhl 17, D-69117 Heidelberg, Germany
16INAF - Osservatorio Astronomico di Cagliari , Via della Scienza 5, I-09047 Selargius , Italy
17Max Planck Institute for Astrophysics , Karl-Schwarzschild-Straße 1, D-85748 Garching, Germany
18Astronomy Research Unit, University of Oulu , FI-90014, Oulu, Finland
19National Radio Astronomy Observatory , 520 Edgemont Road, Charlottesville, VA 22903-2475, USA
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 7.7 MB)
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Language: English
Published: Oxford University Press, 2020
Publish Date: 2020-09-24


We combine data from ALMA and MUSE to study the resolved (∼300 pc scale) star formation relation (star formation rate, SFR, versus molecular gas surface density) in cluster galaxies. Our sample consists of nine Fornax cluster galaxies, including spirals, ellipticals, and dwarfs, covering a stellar mass range of ∼10⁸.⁸–10¹¹ M. CO(1–0) and extinction corrected Hα were used as tracers for the molecular gas mass and SFR, respectively. We compare our results with Kennicutt and Bigiel et al. Furthermore, we create depletion time maps to reveal small-scale variations in individual galaxies. We explore these further in FCC290, using the ‘uncertainty principle for star formation’ (Kruijssen & Longmore) to estimate molecular cloud lifetimes, which we find to be short (<10 Myr) in this galaxy. Galaxy-averaged depletion times are compared with other parameters such as stellar mass and cluster-centric distance. We find that the star formation relation in the Fornax cluster is close to those from Kennicutt and Bigiel et al., but overlaps mostly with the shortest depletion times predicted by Bigiel et al. This slight decrease in depletion time is mostly driven by dwarf galaxies with disturbed molecular gas reservoirs close to the virial radius. In FCC90, a dwarf galaxy with a molecular gas tail, we find that depletion times are a factor ≳10 higher in its tail than in its stellar body.

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Series: Monthly notices of the Royal Astronomical Society
ISSN: 0035-8711
ISSN-E: 1365-8711
ISSN-L: 0035-8711
Volume: 496
Issue: 2
Pages: 2155 - 2182
DOI: 10.1093/mnras/staa1513
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Funding: NZ acknowledges support from the European Research Council (ERC) in the form of Consolidator Grant CosmicDust (ERC-2014-CoG-647939). TAD acknowledges support from the Science and Technology Facilities Council through grant ST/S00033X/1. MC and JMDK gratefully acknowledge funding from the Deutsche Forschungsgemeinschaft (DFG) through an Emmy Noether Research Group (grant no. KR4801/1-1) and the DFG Sachbeihilfe (grant no.KR4801/2-1). JMDK gratefully acknowledges funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme via the ERC Starting Grant MUSTANG (grant agreement no. 714907). IDL gratefully acknowledges the support of the Research Foundation Flanders (FWO). EMC is supported by MIUR grant no. PRIN 2017 20173ML3WW_001 and by Padua University grant no.s DOR1715817/17, DOR1885254/18, and DOR1935272/19.
Copyright information: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (