A 500 kpc HI Tail of the Virgo Pair NGC4532/DDO137 Detected by ALFALFA
Abstract
HI observations of the Virgo Cluster pair NGC 4532/DDO 137, conducted as part of the Arecibo Legacy Fast ALFA Survey, reveal an HI feature extending ~500kpc to the southwest. The structure has a total mass of up to 7 x 108M⊙, equivalent to 10% of the pair HI mass. Optical R imaging reveals no counterparts to a level of 26.5 mag arcsec−2. The structure is likely the result of galaxy harassment.
- Publication:
-
Dark Galaxies and Lost Baryons
- Pub Date:
- May 2008
- DOI:
- arXiv:
- arXiv:0707.3277
- Bibcode:
- 2008IAUS..244..362K
- Keywords:
-
- galaxies: dwarf;
- galaxies: evolution;
- galaxies: formation;
- galaxies: clusters: Virgo;
- Astrophysics
- E-Print:
- 2 pages. To be published in proceedings of IAU Symposium 244: 'Dark Galaxies and Lost Baryons', J. I. Davies &