TY - JOUR
T1 - A new collisional ring galaxy at z = 0.111
T2 - Auriga's Wheel
AU - Conn, Blair C.
AU - Pasquali, Anna
AU - Pompei, Emanuela
AU - Lane, Richard R.
AU - Chené, André Nicolas
AU - Smith, Rory
AU - Lewis, Geraint F.
PY - 2011/11/10
Y1 - 2011/11/10
N2 - 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 ∼ 200kms-1 consistent with our observations, making the collision about 50 Myr old. The ring currently has a radius of about 10kpc and a bridge of stars and gas is also visible connecting the two galaxies.
AB - 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 ∼ 200kms-1 consistent with our observations, making the collision about 50 Myr old. The ring currently has a radius of about 10kpc and a bridge of stars and gas is also visible connecting the two galaxies.
KW - galaxies: distances and redshifts
KW - galaxies: interactions
KW - galaxies: kinematics and dynamics
UR - http://www.scopus.com/inward/record.url?scp=80155155902&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/741/2/80
DO - 10.1088/0004-637X/741/2/80
M3 - Article
SN - 0004-637X
VL - 741
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 80
ER -