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Title:
Detection of [O I] 63mum in absorption toward SGR B2.
Authors:
Baluteau, J.-P.; Cox, P.; Cernicharo, J.; Pequignot, D.; Caux, E.; Lim, T.; Swinyard, B.; White, G.; Kessler, M.; Prusti, T.; Barlow, M.; Clegg, P. E.; Emery, R. J.; Furniss, I.; Glencross, W.; Gry, C.; Joubert, M.; Liseau, R.; Nisini, B.; Saraceno, P.; Serra, G.; Armand, C.; Burgdorf, M.; Digiorgio, A.; Molinari, S.; Price, M.; Texier, D.; Sidher, S.; Trams, N.
Publication:
Astronomy and Astrophysics, v.322, p.L33-L36 (A&A Homepage)
Publication Date:
06/1997
Origin:
CDS
Astronomy Keywords:
ISM: ABUNDANCES, (ISM:) DUST, EXTINCTION, (ISM:) H II REGIONS, ISM: INDIVIDUAL OBJECTS: SGR B2, INFRARED: ISM: CONTINUUM, INFRARED: ISM: LINES AND BANDS
Bibliographic Code:
1997A&A...322L..33B

Abstract

A high signal-to-noise 52-90mum spectrum is presented for the central part of the Sagittarius B2 complex. The data were obtained with the Long Wavelength Spectrometer on board the Infrared Space Observatory (ISO). The [O I] 63mum line is detected in absorption even at the grating spectral resolution of 0.29mum. A lower limit for the column density of atomic oxygen of the order of 10^19^cm^-2^ is derived. This implies that more than 40% of the interstellar oxygen must be in atomic form along the line of sight toward the Sgr B2 molecular cloud.

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