TY - JOUR
T1 - Discovery of a giant HI tail in the galaxy group HCG 44
AU - Serra, Paolo
AU - Koribalski, Bärbel
AU - Duc, Pierre Alain
AU - Oosterloo, Tom
AU - McDermid, Richard M.
AU - Michel-Dansac, Leo
AU - Emsellem, Eric
AU - Cuillandre, Jean Charles
AU - Alatalo, Katherine
AU - Blitz, Leo
AU - Bois, Maxime
AU - Bournaud, Frédéric
AU - Bureau, Martin
AU - Cappellari, Michele
AU - Crocker, Alison F.
AU - Davies, Roger L.
AU - Davis, Timothy A.
AU - Zeeuw, P. T.
AU - Khochfar, Sadegh
AU - Krajnović, Davor
AU - Kuntschner, Harald
AU - Lablanche, Pierre Yves
AU - Morganti, Raffaella
AU - Naab, Thorsten
AU - Sarzi, Marc
AU - Scott, Nicholas
AU - Weijmans, Anne Marie
AU - Young, Lisa M.
PY - 2013/1
Y1 - 2013/1
N2 - We report the discovery of a giant HI tail in the intragroup medium of HCG 44 as part of the ATLAS3D survey. The tail is ~300 kpc long in projection and contains ~5 × 108 M ⊙of HI. We detect no diffuse stellar light at the location of the tail down to ~28.5 mag arcsec-2 in g band. We speculate that the tail might have formed as gas was stripped from the outer regions of NGC 3187 (a member of HCG 44) by the group tidal field. In this case, a simple model indicates that about 1/3 of the galaxy's HI was stripped during a time interval of <1 Gyr. Alternatively, the tail may be the remnant of an interaction between HCG 44 and NGC 3162, a spiral galaxy now ~650 kpc away from the group. Regardless of the precise formation mechanism, the detected HI tail shows for the first time direct evidence of gas stripping in HCG 44. It also highlights that deep HI observations over a large field are needed to gather a complete census of this kind of events inthe local Universe.
AB - We report the discovery of a giant HI tail in the intragroup medium of HCG 44 as part of the ATLAS3D survey. The tail is ~300 kpc long in projection and contains ~5 × 108 M ⊙of HI. We detect no diffuse stellar light at the location of the tail down to ~28.5 mag arcsec-2 in g band. We speculate that the tail might have formed as gas was stripped from the outer regions of NGC 3187 (a member of HCG 44) by the group tidal field. In this case, a simple model indicates that about 1/3 of the galaxy's HI was stripped during a time interval of <1 Gyr. Alternatively, the tail may be the remnant of an interaction between HCG 44 and NGC 3162, a spiral galaxy now ~650 kpc away from the group. Regardless of the precise formation mechanism, the detected HI tail shows for the first time direct evidence of gas stripping in HCG 44. It also highlights that deep HI observations over a large field are needed to gather a complete census of this kind of events inthe local Universe.
UR - http://www.scopus.com/inward/record.url?scp=84872373799&partnerID=8YFLogxK
U2 - 10.1093/mnras/sts033
DO - 10.1093/mnras/sts033
M3 - Article
AN - SCOPUS:84872373799
VL - 428
SP - 370
EP - 380
JO - Monthly Notices of the Royal Astronomical Society: Letters
JF - Monthly Notices of the Royal Astronomical Society: Letters
SN - 1745-3925
IS - 1
ER -