A Herschel Space Observatory Spectral Line Survey of Local Luminous Infrared Galaxies from 194 to 671 Microns

	A Herschel Space Observatory Spectral Line Survey of Local Luminous Infrared Galaxies from 194 to 671 Microns
	Lu, Nanyao; Zhao, Yinghe; Diaz-Santos, Tanio; Kevin Xu, C.; Gao, Yu; Armus, Lee; Isaak, Kate G.; Mazzarella, Joseph M.; van der Werf, Paul P.; Appleton, Philip N.
刊名	ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
	2017
卷号	230 期号:1 页码:1-
英文摘要	We describe a Herschel Space Observatory 194-671 mu m spectroscopic survey of a sample of 121 local luminous infrared galaxies and report the fluxes of the CO J to J-1 rotational transitions for 4 <= J <= 13, the [N II] 205 mu m line, the [C I] lines at 609 and 370 mu m, as well as additional and usually fainter lines. The CO spectral line energy distributions (SLEDs) presented here are consistent with our earlier work, which was based on a smaller sample, that calls for two distinct molecular gas components in general: (i) a cold component, which emits CO lines primarily at J less than or similar to 4 and likely represents the same gas phase traced by CO (1-0), and (ii) a warm component, which dominates over the mid-J regime (4 < J less than or similar to 10) and is intimately related to current star formation. We present evidence that the CO line emission associated with an active galactic nucleus is significant only at J > 10. The flux ratios of the two [C I] lines imply modest excitation temperatures of 15-30 K; the [C I] 370 mu m line scales more linearly in flux with CO (4-3) than with CO (7-6). These findings suggest that the [C I] emission is predominantly associated with the gas component defined in (i) above. Our analysis of the stacked spectra in different far-infrared (FIR) color bins reveals an evolution of the SLED of the rotational transitions of H2O vapor as a function of the FIR color in a direction consistent with infrared photon pumping.
语种	英语
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/17402]
专题	中国科学院紫金山天文台
推荐引用方式 GB/T 7714	Lu, Nanyao,Zhao, Yinghe,Diaz-Santos, Tanio,et al. A Herschel Space Observatory Spectral Line Survey of Local Luminous Infrared Galaxies from 194 to 671 Microns[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2017,230(1):1-.
APA	Lu, Nanyao.,Zhao, Yinghe.,Diaz-Santos, Tanio.,Kevin Xu, C..,Gao, Yu.,...&Surace, Jason A..(2017).A Herschel Space Observatory Spectral Line Survey of Local Luminous Infrared Galaxies from 194 to 671 Microns.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,230(1),1-.
MLA	Lu, Nanyao,et al."A Herschel Space Observatory Spectral Line Survey of Local Luminous Infrared Galaxies from 194 to 671 Microns".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 230.1(2017):1-.