Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89..406f&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 89, March 1984, p. 406-410.
Astronomy and Astrophysics
Astronomy
31
Hydroxyl Emission, Infrared Astronomy, Interstellar Masers, Radio Astronomy, Astronomical Catalogs, Flux Quantization, Line Spectra, Position (Location)
Scientific paper
The authors have measured accurate positions at 1612 MHz for 52 Type II OH masers. In many cases they have also determined the angular sizes of the masers at the peak of the OH line profile. The authors have also measured the 10-micron flux for many of the objects and the 2 - 10-micron flux distribution for eight of them. The masers display a wide range of 10-micron fluxes for a given OH line peak flux. The infrared flux distributions can be matched approximatly by blackbody distributions for temperatures ranging from about 400 to 800K. Consideration of the kinematics of the Type II OH masers suggests that most of the angular sizes (and upper limits) are consistent with a linear diameter of the region responsible for the peak of the OH line profile in the range 3000 - 5000 AU.
Fix John D.
Mutel Robert L.
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