The far-IR spectrum of Sagittarius B2 region: Extended molecular absorption, photodissociation and photoionization

Details The far-IR spectrum of Sagittarius B2 region: Extended molecular absorption, photodissociation and photoionization The far-IR spectrum of Sagittarius B2 region: Extended molecular absorption, photodissociation and photoionization

2003-09-12

arxiv.org/abs/astro-ph/0309353v1

Astrophys.J.600:214-233,2004

Astronomy and Astrophysics

Astrophysics

46 pages, 10 figures, 5 tables, accepted in ApJ part I. (Figs. 1, 2, 3, 9 and 10 have been bitmapped to low resolution)

Scientific paper

10.1086/379704

We present large scale 9'x 27'(25 pc x 70 pc) far-IR observations around Sgr B2 using the Long-wavelength spectrometer (LWS) on board the Infrared Space Observatory (ISO). The spectra are dominated by the strong continuum emission of dust, the widespread molecular absorption of light hydrides (OH, CH and H2O) and the fine structure lines of [NII], [NIII], [OIII], [CII] and [OI]. The molecular richness in the outer layers of Sgr B2 is probed by the ISO-LWS Fabry-Perot (35 km s^-1) detections towards Sgr B2(M), where more that 70 lines from 15 molecular and atomic species are observed at high signal to noise ratio.

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