Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...279l..51j&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 279, April 15, 1984, p. L51-L54.
Astronomy and Astrophysics
Astronomy
72
Infrared Astronomy, Interstellar Masers, Radio Sources (Astronomy), Submillimeter Waves, Water Masers, H Ii Regions, Milky Way Galaxy, Molecular Clouds, O Stars
Scientific paper
The submillimeter continuum emission from the region around W51 is mapped with 40-arcsec resolution. The emission peaks on the H2O maser-emission center W51 MAIN and has a secondary maximum near the compact H II region/20-micron source W51 IRS 2. This is in contrast to the far-IR emission distribution which peaks strongly on IRS 2. The submillimeter and far-IR results together show that, while IRS 2 dominates the luminosity distribution, most of the molecular material in W51 surrounds W51 MAIN. The submillimeter results imply a total mass for the W51 molecular cloud of approximately 100,000 solar mass, one-fourth of which lies within 20 arcsec (0.7 pc) of the source center. The mean H2 density over this inner region is approximately 200,000/cu cm. The core mass is therefore more than 500 times the Jeans mass for this region. The visual extinction toward the peak of the source is more than 1000 mag. This large value may explain the nondetection of 20-micron emission from the powerful H2O maser emission centers and compact H II regions near the submillimeter peak.
Becklin Eric E.
Hildebrand Roger H.
Jaffe Daniel T.
No associations
LandOfFree
The massive core of W51 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 The massive core of W51, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The massive core of W51 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1498832