A survey of the cold molecular gas in gravitationally lensed star-forming galaxies at z > 2
A survey of the cold molecular gas in gravitationally lensed star-forming galaxies at z > 2
复制标题
对 z > 2 引力透镜恒星形成星系中冷分子气体的调查
DOI:
10.1093/mnras/stw275
复制
发表时间:
2016
影响因子:
4.8
通讯作者:
Aravena M
中科院分区:
文献类型:
--
作者:
Aravena M
Using the Australia Telescope Compact Array, we conducted a survey of COJ= 1 − 0 andJ= 2 − 1 line emission towards strongly lensed high-redshift dusty star-forming galaxies (DSFGs) previously discovered with the South Pole Telescope (SPT). Our sample comprises 17 sources that had CO-based spectroscopic redshifts obtained with the Atacama Large Millimeter/submillimeter Array and the Atacama Pathfinder Experiment. We detect all sources with known redshifts in either COJ= 1 − 0 orJ= 2 − 1. 12 sources are detected in the 7-mm continuum. The derived CO luminosities imply gas masses in the range (0.5–11) × 1010M⊙and gas depletion time-scalestdep< 200 Myr, using a CO to gas mass conversion factor αCO= 0.8 M⊙(K km s−1pc2)−1. Combining the CO luminosities and dust masses, along with a fixed gas-to-dust ratio, we derive αCOfactors in the range 0.4–1.8 M⊙(K km s−1pc2)−1, similar to what is found in other starbursting systems. We find small scatter in αCOvalues within the sample, even though inherent variations in the spatial distribution of dust and gas in individual cases could bias the dust-based αCOestimates. We find that lensing magnification factors based on the CO linewidth to luminosity relation (μCO) are highly unreliable, but particularly when μ < 5. Finally, comparison of the gas and dynamical masses suggest that the average molecular gas fraction stays relatively constant atz= 2–5 in the SPT DSFG sample.
登录
查看更多内容
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
R. Decarli;F. Walter;C. Carilli;D. Riechers;P. Cox;R. Neri;M. Aravena;E. Bell;F. Bertoldi;D. Colombo;E. da Cunha;E. Daddi;M. Dickinson;D. Downes;R. Ellis;L. Lentati;R. Maiolino;K. Menten;H. Rix;M. Sargent;D. Stark;B. Weiner;A. Weiss
通讯作者:
A. Weiss
DOI:
10.1111/j.1365-2966.2012.21584.x
发表时间:
2012
影响因子:
4.8
作者:
A. Thomson;R. Ivison;R. Ivison;I. Smail;A. Swinbank;A. Weiss;J. Kneib;Padelis P. Papadopoulos;A. Baker;C. Sharon;G. V. Moorsel
通讯作者:
G. V. Moorsel
DOI:
10.1088/0004-637x/768/1/74
发表时间:
2012-11
期刊:
The Astrophysical Journal
影响因子:
--
作者:
L. Tacconi;R. Neri;R. Genzel;F. Combes;A. Bolatto;M. Cooper;S. Wuyts;F. Bournaud;A. Burkert-
通讯作者:
L. Tacconi;R. Neri;R. Genzel;F. Combes;A. Bolatto;M. Cooper;S. Wuyts;F. Bournaud;A. Burkert-
DOI:
10.1086/379968
发表时间:
2003-10
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
R. Neri;R. Genzel;R. Ivison;F. Bertoldi;A. Blain;S. Chapman;P. Cox;T. Greve;A. Omont;D. Frayer
通讯作者:
R. Neri;R. Genzel;R. Ivison;F. Bertoldi;A. Blain;S. Chapman;P. Cox;T. Greve;A. Omont;D. Frayer
影响因子:
6.5
作者:
Canameras, R.;Nesvadba, N. P. H.;Yan, L.
通讯作者:
Yan, L.