1. H i in Virgo’s 'Red and Dead' Dwarf Ellipticals—A Tidal Tail and Central Star Formation
- Author
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Emmanouil Papastergis, Gregory Hallenbeck, Martha P. Haynes, Rebecca A. Koopmann, Lukas Leisman, Riccardo Giovanelli, Shan Huang, and Astronomy
- Subjects
Stellar mass ,I CONTENT ,FOS: Physical sciences ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,VCC 190 ,01 natural sciences ,Spectral line ,Optical imaging ,galaxies ,0103 physical sciences ,EARLY-TYPE GALAXIES ,Astrophysics::Solar and Stellar Astrophysics ,STELLAR POPULATIONS ,FORMATION HISTORIES ,IRREGULAR GALAXIES ,CLUSTER GALAXIES ,LOCAL GROUP ,individual ,Tidal tail ,010303 astronomy & astrophysics ,FAST-ALPHA SURVEY ,Astrophysics::Galaxy Astrophysics ,Physics ,Spiral galaxy ,NEUTRAL-HYDROGEN ,010308 nuclear & particles physics ,Star formation ,Astronomy and Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Virgo Cluster ,VCC 1533 ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,galaxies: clusters: individual: Virgo ,Elliptical galaxy ,DIGITAL SKY SURVEY ,Astrophysics::Earth and Planetary Astrophysics ,galaxies: evolution ,VCC 611 - Abstract
We investigate a sample of 3 dwarf elliptical galaxies in the Virgo Cluster which have significant reservoirs of HI. We present deep optical imaging (from CFHT and KPNO), HI spectra (Arecibo) and resolved HI imaging (VLA) of this sample. These observations confirm their HI content and optical morphologies, and indicate that the gas is unlikely to be recently accreted. The sample has more in common with dwarf transitionals, although dwarf transitionals are generally lower in stellar mass and gas fraction. VCC 190 has an HI tidal tail from a recent encounter with the massive spiral galaxy NGC 4224. In VCC 611, blue star-forming features are observed which were unseen by shallower SDSS imaging., Comment: 11 pages, 6 figures, accepted in AJ
- Published
- 2017
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