Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...373l..13p&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 373, May 20, 1991, p. L13-L15.
Astronomy and Astrophysics
Astrophysics
15
Ammonia, H Ii Regions, Interstellar Masers, Very Long Base Interferometry, Astronomical Spectroscopy, Brightness Temperature, Interstellar Matter, Star Formation
Scientific paper
The first VLBI measurement of interstellar ammonia (NH3) masers is reported. The positions, as well as size and brightness temperature limits, for the masers in the NH3 (9, 6) inversion transition that are associated with the ultracompact H II regions W51 e1 and e2 were obtained. The masers arise from two positions, each of which is located close to but not coincident with a radio continuum peak. The NH3 masers are closer to the H2O masers than to the OH masers or the ultracompact H II regions. However, at least one of the two NH3 maser spots mapped seems offset from the region of H2O maser activity. The NH3 maser spots are unresolved in angle and smaller than 0.1 milli-arcsec. Unless these masers are highly beamed, they appear to be saturated.
Menten Karl. M.
Moran James Michael
Pratap Preethi
Reid Mark J.
Walmsley Charles Malcolm
No associations
LandOfFree
VLBI observations of interstellar ammonia masers 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 VLBI observations of interstellar ammonia masers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and VLBI observations of interstellar ammonia masers will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1036996