The redshift and nature of AzTEC/COSMOS 1: A starburst galaxy at z=4.6

Details The redshift and nature of AzTEC/COSMOS 1: A starburst galaxy at z=4.6 The redshift and nature of AzTEC/COSMOS 1: A starburst galaxy at z=4.6

2011-02-21

arxiv.org/abs/1102.4329v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

7 pages, 4 figures, 1 table, accepted for publication in ApJL; one reference corrected

Scientific paper

Based on broad/narrow-band photometry and Keck DEIMOS spectroscopy we report a redshift of z=4.64-0.08+0.06 for AzTEC/COSMOS 1, the brightest sub-mm galaxy in the AzTEC/COSMOS field. In addition to the COSMOS-survey X-ray to radio data, we report observations of the source with Herschel/PACS (100, 160 micron), CSO/SHARC II (350 micron), CARMA and PdBI (3 mm). We do not detect CO(5-4) line emission in the covered redshift ranges, 4.56-4.76 (PdBI/CARMA) and 4.94-5.02 (CARMA). If the line is within this bandwidth, this sets 3sigma upper limits on the gas mass to <~8x10^9 M_Sol and <~5x10^10 M_Sol, respectively (assuming similar conditions as observed in z~2 SMGs). This could be explained by a low CO-excitation in the source. Our analysis of the UV-IR spectral energy distribution of AzTEC 1 shows that it is an extremely young (<~50 Myr), massive (M*~10^11 M_Sol), but compact (<~2 kpc) galaxy forming stars at a rate of ~1300 M_Sol/yr. Our results imply that AzTEC 1 is forming stars in a 'gravitationally bound' regime in which gravity prohibits the formation of a superwind, leading to matter accumulation within the galaxy and further generations of star formation.

Affiliated with

Also associated with

No associations

Rating

The redshift and nature of AzTEC/COSMOS 1: A starburst galaxy at z=4.6 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 The redshift and nature of AzTEC/COSMOS 1: A starburst galaxy at z=4.6, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The redshift and nature of AzTEC/COSMOS 1: A starburst galaxy at z=4.6 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-557481