Pregled bibliografske jedinice broj: 618582
Molecular Gas in a Submillimeter Galaxy at z = 4.5: Evidence for a Major Merger at 1 Billion Years after the Big Bang
Molecular Gas in a Submillimeter Galaxy at z = 4.5: Evidence for a Major Merger at 1 Billion Years after the Big Bang // The Astrophysical journal, 689 (2009), 1; L5-L8 doi:10.1086/595680 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 618582 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Molecular Gas in a Submillimeter Galaxy at z = 4.5: Evidence for a Major Merger at 1 Billion Years after the Big Bang
Autori
Schinnerer, E. ; Carilli, C.L. ; Capak, P. ; Martinez-Sansigre, A. ; Scoville, N.Z. ; Smolčić, Vernesa ; Taniguchi, Y. ; Yun, M.S. ; Bertoldi, F. ; Le Fevre, O. ; de Ravel, L.
Izvornik
The Astrophysical journal (0004-637X) 689
(2009), 1;
L5-L8
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Galaxies: Formation; Galaxies: High-Redshift; Galaxies: ISM; Galaxies: Starburst; Submillimeter
Sažetak
We report the detection of CO molecular line emission in the z=4.5 millimeter-detected galaxy COSMOS J100054+023436 (hereafter J1000+0234) using the IRAM Plateau de Bure interferometer (PdBI) and NRAO's Very Large Array (VLA). The 12CO(4-3) line as observed with PdBI has a full line width of ~1000 km s-1, an integrated line flux of 0.66 Jy km s-1, and a CO luminosity of 3.2 × 1010 Lsolar. Comparison to the 3.3 σ 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 2.6 × 1010 Msolar assuming an ULIRG-like conversion factor. From the spatial offset of the red- and blueshifted line peaks and the line width a dynamical mass of 1.1 × 1011 Msolar 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 Lyα emission. J1000+0234 exhibits very typical properties for lower redshift (z~2) submillimeter 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 Msolar yr-1 and molecular gas content this object could be the precursor of a ``red and dead'' elliptical observed at a redshift of z=2.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Ustanove:
Prirodoslovno-matematički fakultet, Zagreb
Profili:
Vernesa Smolčić
(autor)
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
