Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...163..177m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 163, no. 1-2, July 1986, p. 177-184.
Astronomy and Astrophysics
Astrophysics
21
Electron Transitions, H Ii Regions, Hydroxyl Emission, Interstellar Masers, Absorption Spectra, Astronomical Spectroscopy, Galactic Nuclei, High Resolution, Molecular Rotation
Scientific paper
Sensitive observations are reported of Lambda-doubling transitions in the rotationally-excited 2Pi3/2, J = 7/2 state of OH, toward several compact H II regions. These results double the available sample of sources observed in these transitions of OH, and show that absorption is relatively common in the 'main' lines for such sources. In one case (Orion A) weak, relatively broad emission appears to have been detected. No new cases of narrow maser-line emission were discovered, and the 'satellite' lines also were not detected. Main line anomalies, with the 13441-MHz (F = 4-4) line intensity enhanced with respect to that of the 13455-MHz (F = 3-3) line, occur in most sources, implying an upper limit to the density of about 10 to the 8th/cu-cm. These results indicate typical kinetic temperatures in the range of 100 to 200 K close to the H II regions.
Baudry Alain
Guilloteau Stéphane
Matthews Henry E.
Winnberg Anders
No associations
LandOfFree
Observations of the 2Pi3/2, J = 7/2 transition of OH toward compact H II regions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Observations of the 2Pi3/2, J = 7/2 transition of OH toward compact H II regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of the 2Pi3/2, J = 7/2 transition of OH toward compact H II regions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1654521