The Herschel Virgo Cluster Survey. XVIII. Star-forming dwarf galaxies in a cluster environment

Abstract

To assess the effects of the cluster environment on the different components of the interstellar medium, we analyse the FIR-submm properties of a sample of star-forming dwarf (SFD) galaxies detected by the Herschel Virgo Cluster Survey (HeViCS). We determine dust masses and dust temperatures by fitting a modified black body (MBB) function to the spectral energy distributions (SEDs). Stellar and gas masses, star formation rates (SFRs), and metallicities are obtained from the analysis of a set of ancillary data. Dust is detected in 49 out of 140 optically identified dwarfs covered by the HeViCS field; considering only dwarfs brighter than $m_B$ = 18 mag, this gives a detection rate of 43%. After evaluating different emissivity indices, we find that the FIR-submm SEDs are best-fit by $\beta$=1.5, with a median dust temperature $T_d$ = 22.4 K. Assuming $\beta$=1.5, 67% of the 23 galaxies detected in all five Herschel bands show emission at 500 $\mu$m in excess of the MBB model. The excess is inversely correlated with SFR and stellar masses. To study the variations in the global properties of our sample due to environmental effects, we compare the Virgo SFDs to other Herschel surveys, such as KINGFISH, the Dwarf Galaxy Survey (DGS), and the HeViCS bright galaxy catalogue (BGC). We explore the relations between stellar mass and HI fraction, specific SFR, dust fraction, gas-to-dust ratio over a wide range of stellar masses. Highly HI-deficient Virgo dwarf galaxies are mostly characterised by quenched star formation activity and lower dust fractions giving hints for dust stripping in cluster dwarfs. However, we find that the fraction of dust removed has to be less than that of the HI component. Since the Virgo SFDs are likely to be crossing the cluster for the first time, a longer timescale might be necessary to strip the more centrally concentrated dust distribution.

31 pages, 20 figures, accepted for publication in Astronomy and Astrophysics. V2: minor corrections, updated references

References in corpus (16)

• Dust Masses, PAH Abundances, and Starlight Intensities in the SINGS Galaxy Sample
• The Resolved Properties of Extragalactic Giant Molecular Clouds
• An H-alpha Imaging Survey of Galaxies in the Local 11 Mpc Volume
• The UV-Optical Color Magnitude Diagram II: Physical Properties and Morphological Evolution On and Off of a Star-Forming Sequence
• Strangulation in Galaxy Groups
• Color--Mass-to-Light Ratio Relations for Disk Galaxies
• The origin of dwarf ellipticals in the Virgo cluster
• Far-infrared to millimeter astrophysical dust emission I: A model based on physical properties of amorphous solids
• Environmentally-Driven Evolution of Simulated Cluster Galaxies
• Empirical strong-line oxygen abundance calibrations from galaxies with electron temperature measurements
• Dust origin in late-type dwarf galaxies: ISM growth vs. type II supernovae
• Systematic Uncertainties in Stellar Mass Estimation for Distinct Galaxy Populations
• Cool dust heating and temperature mixing in nearby star-forming galaxies
• Multiwavelength star formation indicators: Observations
• Untangling the Nature of Spatial Variations of Cold Dust Properties in Star Forming Galaxies
• The Herschel Virgo Cluster Survey. XVII. SPIRE point-source catalogs and number counts

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