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A NEW COLLISIONAL RING GALAXY AT z = 0.111 : AURIGA'S WHEEL.
- Source :
-
Astrophysical Journal . Nov2011, Vol. 741 Issue 2, Special section p1-6. 6p. - Publication Year :
- 2011
-
Abstract
- We report the serendipitous discovery of a collision ring galaxy, identified as 2MASX J06470249+4554022, which we have dubbed "Auriga's Wheel," found in a SUPRIME-CAM frame as part of a larger Milky Way survey. This peculiar class of galaxies is the result of a near head-on collision typically between a late-type and an early-type galaxy. Subsequent Gemini Multi-object Spectrograph North long-slit spectroscopy has confirmed both the relative proximity of the components of this interacting pair and has shown that it has a redshift of 0.111. Analysis of the spectroscopy reveals that the late-type galaxy is a LINER class active galactic nucleus (AGN) while the early-type galaxy is also potentially an AGN candidate: this is very uncommon among known collision ring galaxies. Preliminary modeling of the ring finds an expansion velocity of ~200 km s-1 consistent with our observations, making the collision about 50 Myr old. The ring currently has a radius of about 10 kpc and a bridge of stars and gas is also visible connecting the two galaxies. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0004637X
- Volume :
- 741
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Astrophysical Journal
- Publication Type :
- Academic Journal
- Accession number :
- 67711226
- Full Text :
- https://doi.org/10.1088/0004-637X/741/2/80