Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-02-04
Mon.Not.Roy.Astron.Soc. 359 (2005) 401-407
Astronomy and Astrophysics
Astrophysics
Accepted for publication in MNRAS; 8 pages, 2 figure
Scientific paper
10.1111/j.1365-2966.2005.08901.x
We present optical and near-infrared integral field spectroscopy of the SCUBA galaxy SMM J163650.43+405734.5 (ELAIS N2 850.4) at z=2.385. We combine Ly-alpha and H-alpha emission line maps and velocity structure with high resolution HST ACS and NICMOS imaging to probe the complex dynamics of this vigorous star-burst galaxy. The imaging data shows a complex morphology, consisting of at least three components separated by ~1'' (8kpc) in projection. When combined with the H-alpha velocity field from UKIRT UIST IFU observations we identify two components whose redshifts are coincident with the systemic redshift, measured from previous CO observations, one of which shows signs of AGN activity. A third component is offset by 220+/-50km/s from the systemic velocity. The total star formation rate of the whole system (estimated from the narrow-line H-alpha and uncorrected for reddening) is 340+/-50Mo/yr. The Ly-alpha emission mapped by the GMOS IFU covers the complete galaxy and is offset by +270+/-40km/s from the systemic velocity. This velocity offset is comparable to that seen in rest-frame UV-selected galaxies at similar redshifts and usually interpreted as a star-burst driven wind. The extended structure of the Ly-alpha emission suggests that this wind is not a nuclear phenomenon, but is instead a galactic scale outflow. Our observations suggest that the vigorous activity in N2 850.4 is arising as a result of an interaction between at least two dynamically-distinct components, resulting in a strong starburst, a starburst-driven wind and actively-fuelled AGN activity. [abridged]
Blain Andrew
Borys Colin
Bower Richard
Bunker Andrew
Chapman Scott
No associations
LandOfFree
Optical and Near-Infrared Integral Field Spectroscopy of the SCUBA Galaxy N2-850.4 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Optical and Near-Infrared Integral Field Spectroscopy of the SCUBA Galaxy N2-850.4, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical and Near-Infrared Integral Field Spectroscopy of the SCUBA Galaxy N2-850.4 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-527622