WARM MOLECULAR GAS IN LUMINOUS INFRARED GALAXIES

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 星系中的恒星形成研究团组

	WARM MOLECULAR GAS IN LUMINOUS INFRARED GALAXIES
	Lu, N.1; Zhao, Y.1,2,3; Xu, C. K.1; Gao, Y.2,3 ; Armus, L.4; Mazzarella, J. M.1; Isaak, K. G.5; Petric, A. O.6,7; Charmandaris, V.8,9,10; Diaz-Santos, T.4
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2014-06-01
卷号	787 期号:2 页码:0
关键词	galaxies: active galaxies: ISM galaxies: star formation infrared: galaxies ISM: molecules submillimeter: galaxies
ISSN号	2041-8205
英文摘要	We present our initial results on the CO rotational spectral line energy distribution (SLED) of the J to J-1 transitions from J = 4 up to 13 from Herschel SPIRE spectroscopic observations of 65 luminous infrared galaxies (LIRGs) in the Great Observatories All-Sky LIRG Survey. The observed SLEDs change on average from one peaking at J <= 4 to a broad distribution peaking around J similar to 6 to 7 as the IRAS 60-to-100 mu m color, C(60/100), increases. However, the ratios of a CO line luminosity to the total infrared luminosity, L-IR, show the smallest variation for J around 6 or 7. This suggests that, for most LIRGs, ongoing star formation (SF) is also responsible for a warm gas component that emits CO lines primarily in the mid-J regime (5 less than or similar to J less than or similar to 10). As a result, the logarithmic ratios of the CO line luminosity summed over CO (5-4), (6-5), (7-6), (8-7) and (10-9) transitions to L-IR, log R-midCO, remain largely independent of C(60/100), and show a mean value of -4.13 ( log R-midCO(SF)) and a sample standard deviation of only 0.10 for the SF-dominated galaxies. Including additional galaxies from the literature, we show, albeit with a small number of cases, the possibility that galaxies, which bear powerful interstellar shocks unrelated to the current SF, and galaxies, in which an energetic active galactic nucleus contributes significantly to the bolometric luminosity, have their R-midCO higher and lower than R-midCO(SF), respectively.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	STAR-FORMATION RATE ; SPITZER-SPACE-TELESCOPE ; NGC 6240 ; SPIRE SPECTROSCOPY ; RADIO GALAXIES ; EMISSION ; CO ; LINE ; EXCITATION ; STARBURST
收录类别	SCI
原文出处	10.1088/2041-8205/787/2/L23
语种	英语
WOS记录号	WOS:000336797700008
公开日期	2014-11-21
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/10693]
专题	紫金山天文台_星系中的恒星形成研究团组
作者单位	1.CALTECH, Infrared Proc & Anal Ctr, Pasadena, CA 91125 USA 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China 4.CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA 5.European Space Agcy, Estec, Astrophys Miss Div, NL-2200 AG Noordwijk, Netherlands 6.Gemini Observ, Hilo, HI 96720 USA 7.CALTECH, Dept Astron, Pasadena, CA 91125 USA 8.Univ Crete, Dept Phys, GR-71003 Iraklion, Greece 9.Natl Observ Athens, IAASARS, GR-15236 Penteli, Greece 10.Observ Paris, Chercheur Associe, F-75014 Paris, France
推荐引用方式 GB/T 7714	Lu, N.,Zhao, Y.,Xu, C. K.,et al. WARM MOLECULAR GAS IN LUMINOUS INFRARED GALAXIES[J]. ASTROPHYSICAL JOURNAL LETTERS,2014,787(2):0.
APA	Lu, N..,Zhao, Y..,Xu, C. K..,Gao, Y..,Armus, L..,...&van der Werf, P. P..(2014).WARM MOLECULAR GAS IN LUMINOUS INFRARED GALAXIES.ASTROPHYSICAL JOURNAL LETTERS,787(2),0.
MLA	Lu, N.,et al."WARM MOLECULAR GAS IN LUMINOUS INFRARED GALAXIES".ASTROPHYSICAL JOURNAL LETTERS 787.2(2014):0.