MOLECULAR GAS IN z similar to 6 QUASAR HOST GALAXIES

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳高能及相关物理过程研究团组

	MOLECULAR GAS IN z similar to 6 QUASAR HOST GALAXIES
	Wang, Ran 1,2,3; Carilli, Chris L.2; Neri, R.4; Riechers, D. A.5; Wagg, Jeff 2,6; Walter, Fabian 7; Bertoldi, Frank 8; Menten, Karl M.9; Omont, Alain 10,11; Cox, Pierre 4
刊名	ASTROPHYSICAL JOURNAL
	2010-05-01
卷号	714 期号:1 页码:699-712
关键词	galaxies: active galaxies: high-redshift galaxies: starburst molecular data radio lines: galaxies
ISSN号	0004-637X
英文摘要	We report our new observations of redshifted carbon monoxide emission from six z similar to 6 quasars, using the IRAM Plateau de Bure Interferometer. CO (6-5) or (5-4) line emission was detected in all six sources. Together with two other previous CO detections, these observations provide unique constraints on the molecular gas emission properties in these quasar systems close to the end of the cosmic re-ionization. Complementary results are also presented for low-J CO lines observed at the Green Bank Telescope and the Very Large Array, and dust continuum from five of these sources with the SHARC-II bolometer camera at the Caltech Submillimeter Observatory. We then present a study of the molecular gas properties in our combined sample of eight CO-detected quasars at z similar to 6. The detections of high-order CO line emission in these objects indicates the presence of highly excited molecular gas, with estimated masses on the order of 10(10) M(circle dot) within the quasar host galaxies. No significant difference is found in the gas mass and CO line width distributions between our z similar to 6 quasars and samples of CO-detected 1.4 <= z <= 5 quasars and submillimeter galaxies. Most of the CO-detected quasars at z similar to 6 follow the far-infrared-CO luminosity relationship defined by actively star-forming galaxies at low and high redshifts. This suggests that ongoing star formation in their hosts contributes significantly to the dust heating at FIR wavelengths. The result is consistent with the picture of galaxy formation co-eval with supermassive black hole (SMBH) accretion in the earliest quasar-host systems. We investigate the black hole-bulge relationships of our quasar sample, using the CO dynamics as a tracer for the dynamical mass of the quasar host. The median estimated black hole-bulge mass ratio is about 15 times higher than the present-day value of similar to 0.0014. This places important constraints on the formation and evolution of the most massive SMBH-spheroidal host systems at the highest redshift.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	DIGITAL SKY SURVEY ; SUPERMASSIVE BLACK-HOLES ; SUBMILLIMETER-SELECTED GALAXIES ; ACTIVE GALACTIC NUCLEI ; HIGH-REDSHIFT QUASARS ; MU-M OBSERVATIONS ; CO LINE-WIDTH ; Z-SIMILAR-TO-6 QUASARS ; DISTANT QUASARS ; STAR-FORMATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000276701000056
公开日期	2011-11-23
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/1041]
专题	紫金山天文台_太阳高能及相关物理过程研究团组
作者单位	1.China Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Natl Radio Astron Observ, Socorro, NM 87801 USA 3.Peking Univ, Dept Astron, Beijing 100871, Peoples R China 4.Inst Radioastron Millimetr, F-38406 St Martin Dheres, France 5.CALTECH, Pasadena, CA 91125 USA 6.European So Observ, Santiago 19, Chile 7.Max Planck Inst Astron, D-69117 Heidelberg, Germany 8.Univ Bonn, Argelander Inst Astron, D-53121 Bonn, Germany 9.Max Planck Inst Radioastron, D-53121 Bonn, Germany 10.Univ Paris 06, Paris, France
推荐引用方式 GB/T 7714	Wang, Ran,Carilli, Chris L.,Neri, R.,et al. MOLECULAR GAS IN z similar to 6 QUASAR HOST GALAXIES[J]. ASTROPHYSICAL JOURNAL,2010,714(1):699-712.
APA	Wang, Ran.,Carilli, Chris L..,Neri, R..,Riechers, D. A..,Wagg, Jeff.,...&Fan, Xiaohui.(2010).MOLECULAR GAS IN z similar to 6 QUASAR HOST GALAXIES.ASTROPHYSICAL JOURNAL,714(1),699-712.
MLA	Wang, Ran,et al."MOLECULAR GAS IN z similar to 6 QUASAR HOST GALAXIES".ASTROPHYSICAL JOURNAL 714.1(2010):699-712.