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arxiv: 1005.3058 · v1 · pith:LCGANQTInew · submitted 2010-05-17 · 🌌 astro-ph.CO

The Herschel Virgo cluster survey: V. Star-forming dwarf galaxies - dust in metal-poor environments

M. Grossi , L. K. Hunt , S. Madden , C. Vlahakis , D. J. Bomans , M. Baes , G. J. Bendo , S. Bianchi
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A. Boselli M. Clemens E. Corbelli L. Cortese A. Dariush J. I. Davies I. De Looze S. di Serego Alighieri D. Fadda J. Fritz D. A. Garcia-Appadoo G. Gavazzi C. Giovanardi T. M. Hughes A. P. Jones D. Pierini M. Pohlen S. Sabatini M. W. L. Smith J. Verstappen E. M. Xilouris S. Zibetti
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keywords dustgalaxiesclusterdwarfsurveyvirgoherschelmasses
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We present the dust properties of a small sample of Virgo cluster dwarf galaxies drawn from the science demonstration phase data set of the Herschel Virgo Cluster Survey. These galaxies have low metallicities (7.8 < 12 + log(O/H) < 8.3) and star-formation rates < 10^{-1} M_{sun}/yr. We measure the spectral energy distribution (SED) from 100 to 500 um and derive dust temperatures and dust masses. The SEDs are fitted by a cool component of temperature T < 20 K, implying dust masses around 10^{5} M_{sun} and dust-to-gas ratios D within the range 10^{-3}-10^{-2}. The completion of the full survey will yield a larger set of galaxies, which will provide more stringent constraints on the dust content of star-forming dwarf galaxies.

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