H i in Virgo’s “Red and Dead” Dwarf Ellipticals—A Tidal Tail and Central Star Formation

Journal Article · Tue Aug 01 00:00:00 EDT 2017 · Astronomical Journal (Online)

DOI:https://doi.org/10.3847/1538-3881/AA7C1D· OSTI ID:22663375

Hallenbeck, Gregory; Koopmann, Rebecca ^[1]; Giovanelli, Riccardo; Haynes, Martha P.; Leisman, Lukas ^[2]; Huang, Shan ^[3]; Papastergis, Emmanouil ^[4]

---

1. Union College, Department of Physics and Astronomy, 807 Union Street, Schenectady NY 12308 (United States)
2. Cornell Center for Astrophysics and Planetary Science (CCAPS), Space Sciences Building, Cornell University, Ithaca, NY 14853 (United States)
3. CCPP, New York University, 4 Washington Place, New York, NY 10003 (United States)
4. Kapteyn Astronomical Institute, University of Groningen, Landleven 12, Groningen NL-9747AD (Netherlands)

We investigate a sample of three dwarf elliptical galaxies in the Virgo Cluster that have significant reservoirs of H i. We present deep optical imaging (from CFHT and KPNO), H i spectra (Arecibo), and resolved H i imaging (VLA) of this sample. These observations confirm their H i content and optical morphologies, and indicate that the gas is unlikely to be recently accreted. The sample has more in common with dwarf transitionals, though dwarf transitionals are generally lower in stellar mass and gas fraction. VCC 190 has an H i tidal tail from a recent encounter with the massive spiral galaxy NGC 4224. In VCC 611, blue star-forming features are observed that were not seen by shallower SDSS imaging.

• OSTI ID: 22663375
• Journal Information: Astronomical Journal (Online), Vol. 154, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DWARF STARS
GALAXIES
GALAXY CLUSTERS
MASS
MORPHOLOGY
STAR ACCRETION
STAR CLUSTERS