Detection of HD in emission towards Sagittarius B2

Autor:	J.-P. Baluteau, Bruce Swinyard, Emmanuel Caux, Cecilia Ceccarelli, Edward Polehampton
Rok vydání:	2002
Předmět:	Physics Spectrometer Molecular cloud Astrophysics (astro-ph) FOS: Physical sciences Astronomy and Astrophysics Astrophysics Wavelength Deuterium Space and Planetary Science Sagittarius B2 Spectral resolution Noise (radio) Line (formation)
Zdroj:	Astronomy & Astrophysics. 388:L44-L47
ISSN:	1432-0746 0004-6361
DOI:	10.1051/0004-6361:20020630
Popis:	The giant molecular cloud Sagittarius B2, located near the Galactic Centre, has been observed in the far-infrared by the ISO Long Wavelength Spectrometer. Wavelengths in the range 47-196 microns were covered with the high resolution Fabry-Perot spectrometer, giving a spectral resolution of 30-40 km/s. The J=1-0 and J=2-1 rotational transitions of HD fall within this range at 112 microns and 56 microns. A probable detection was made of the ground state J=1-0 line in emission but the J=2-1 line was not detected above the noise. This allowed us to calculate an upper limit on the temperature in the emitting region of approximately 80 K and a value for the deuterium abundance in the Sgr B2 envelope of D/H=(0.2-11)x10^-6. Comment: 4 pages, 1 figure, accepted by A&A
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bcf9b61b29825bdf45685376bf0fb691 https://doi.org/10.1051/0004-6361:20020630 Zobrazit plný text záznamu