Warm Water Vapor around Sagittarius B2
نویسندگان
چکیده
منابع مشابه
Warm Water Vapor around Sagittarius B2
In the region of Sgr B2 there are several condensations heated externally by nearby hot stars. Therefore H2O far–IR lines are expected to probe only an external low–density and high temperature section of these condensations, whereas millimeter-wave lines can penetrate deeper into them where the density is higher and Tk lower. We have conducted a study combining H2O lines in both spectral regio...
متن کاملHCl absorption toward Sagittarius B2.
We have detected the 626 GHz J = 1 --> 0 transition of hydrogen chloride (H35Cl) in absorption against the dust continuum emission of the molecular cloud Sagittarius B2. The observed line shape is consistent with the blending of the three hyperfine components of this transition by the velocity profile of Sgr B2 observed in other species. The apparent optical depth of the line is tau approxima...
متن کاملHerschel observations of the Sagittarius B2 cores: Hydrides, warm CO, and cold dust ⋆
Context. Sagittarius B2 is one of the most massive and luminous star-forming regions in the Galaxy and shows a very rich chemistry and physical conditions similar to those in much more distant extragalactic starbursts. Aims. We present large-scale far-infrared/submillimeter photometric images and broadband spectroscopic maps taken with the PACS and SPIRE instruments onboard Herschel. Methods. H...
متن کاملFar–IR spectroscopy towards Sagittarius B2
The far–IR is a unique wavelength range for Astrophysical studies, however, it can only be fully sampled from space platforms. The fundamental rotational transitions of light molecules, the high–J transitions of polyatomic species, the bending modes of non-polar molecules, several atomic fine structure lines and many frequencies blocked by the earth atmosphere can only be observed between 50 an...
متن کاملFar-Infrared OH fluorescent emission in Sagittarius B2
We present Infrared Space Observatory (ISO) observations of OH and OH toward Sgr B2 with a spectral resolution of ∼35 km s. The OH J=5/2→3/2 and J=3/2→1/2 rotational lines of the 2Π1/2 ladder are seen in emission while the cross-ladder transitions (from the 2Π3/2 J=3/2 to the J=1/2, 3/2 and 5/2 levels of the 2Π1/2 ladder), and the 2Π3/2 J=5/2←3/2 and J=7/2←5/2 lines are detected in absorption. ...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2006
ISSN: 0004-637X,1538-4357
DOI: 10.1086/501425