Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-04-14
Astron.Astrophys. 404 (2003) 569-578
Astronomy and Astrophysics
Astrophysics
To appear in Astronomy & Astrophysics
Scientific paper
10.1051/0004-6361:20030537
We present the first results of an observational programme undertaken to map the fine structure line emission of singly ionized carbon ([CII] 157.7409 micron) over extended regions using a Fabry Perot spectrometer newly installed at the focal plane of a 100cm balloon-borne far-infrared telescope. This new combination of instruments has a velocity resolution of ~200 km/s and an angular resolution of 1.5'. During the first flight, an area of 30'x15' in Orion A was mapped. The observed [CII] intensity distribution has been compared with the velocity-integrated intensity distributions of 13CO(1-0), CI(1-0) and CO(3-2) from the literature. The observed line intensities and ratios have been analyzed using the PDR models by Kaufman et al. 1999 to derive the incident UV flux and volume density at a few selected positions.
Ghosh Sanjay K.
Kaneda Hidehiro
Mookerjea Bhaswati
Nakagawa Takao
Ojha Devendra K.
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