|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Molecular Gas in a Submillimeter Galaxy at z=4.5: Evidence for a Major Merger at 1 Billion Years after the Big Bang | | E. Schinnerer
; C.L. Carilli
; P. Capak
; A. Martinez-Sansigre
; N.Z. Scoville
; V. Smolcic
; Y. Taniguchi
; M.S. Yun
; F. Bertoldi
; O. Le Fevre
; L. de Ravel
; | | Date: |
19 Oct 2008 | | Abstract: | We report the detection of CO molecular line emission in the z=4.5
millimeter-detected galaxy COSMOS_J100054+023436 (hereafter: J100+0234) using
the IRAM Plateau de Bure interferometer (PdBI) and NRAO’s Very Large Array
(VLA). The CO(4-3) line as observed with PdBI has a full line width of ~1000
km/s, an integrated line flux of 0.66 Jy km/s, and a CO luminosity of 3.2e10
L_sun. Comparison to the 3.3sigma detection of the CO(2-1) line emission with
the VLA suggests that the molecular gas is likely thermalized to the J=4-3
transition level. The corresponding molecular gas mass is 2.6e10 M_sun assuming
an ULIRG-like conversion factor. From the spatial offset of the red- and
blue-shifted line peaks and the line width a dynamical mass of 1.1e11 M_sun is
estimated assuming a merging scenario. The molecular gas distribution coincides
with the rest-frame optical and radio position of the object while being offset
by 0.5’’ from the previously detected Ly$alpha$ emission. J1000+0234 exhibits
very typical properties for lower redshift (z~2) sub-millimeter galaxies (SMGs)
and thus is very likely one of the long sought after high redshift (z>4)
objects of this population. The large CO(4-3) line width taken together with
its highly disturbed rest-frame UV geometry suggest an ongoing major merger
about a billion years after the Big Bang. Given its large star formation rate
(SFR) of >1000 M_sun/yr and molecular gas content this object could be the
precursor of a ’red-and-dead’ elliptical observed at a redshift of z=2. | | Source: | arXiv, 0810.3405 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER