ISO-LWS Observations of [OI] 63 microns in Absorption towards SGRB2

Details ISO-LWS Observations of [OI] 63 microns in Absorption towards SGRB2 ISO-LWS Observations of [OI] 63 microns in Absorption towards SGRB2

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.460..507v&link_type=abstract

The Promise of the Herschel Space Observatory. Eds. G.L. Pilbratt, J. Cernicharo, A.M. Heras, T. Prusti, & R. Harris. ESA-SP 460

Computer Science

Scientific paper

We present high spectral resolution observations of the high mass star formation region Sagittarius B2, with the Long Wavelength Spectrometer on board the ISO satellite in Fabry-Pérot mode. Previous grating observations of the [OI] 63 micron line in absorption against the high far-infrared continuum of the source were used to compute the minimum atomic oxygen column density along the line of sight. We have performed a more detailed analysis and interpret the observed [OI] 63 micron line absorption as due to the oxygen associated with both atomic hydrogen clouds and molecular clouds present on the line of sight. We found that HI clouds are responsible only for a fraction of this absorption and that the total atomic oxygen column density is around 1.1 x 1020 cm-2 compatible with the minimum column density of 1019 cm-2 computed in the grating mode.

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