Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (44) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (34)
· Also-Read Articles (Reads History)
· Translate This Page
321 GHz submillimeter water masers around evolved stars
Menten, Karl M.; Melnick, Gary J.
AA(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA), AB(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA)
Astrophysical Journal (ISSN 0004-637X), vol. 377, Aug. 20, 1991, p. 647-656. (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Interstellar Masers, Submillimeter Waves, Supergiant Stars, Variable Stars, Water Masers, Emission Spectra, Late Stars, Stellar Envelopes, Stellar Luminosity, Water Vapor
Bibliographic Code:


The 321 GHz 10(29) - 9(36) transition of water vapor has been detected toward 10 Mira and semiregular variables and one supergiant. Maser action is almost certainly involved in all the cases, since the observed spectra generally show a few narrow components which have quite high intensities in some cases. Spectra of the 22 GHz 6(16) - 5(23) transition of H2O were taken almost simultaneously with the 321 GHz spectra. The 22 GHz emission feature are observed at velocities that do not show detectable 321 GHz emission, and vice versa. The ratio between the integrated lunminosities observed in the 22 and 321 GHz line is comparable to or less than unity for most stars. Toward VY CMa, the velocity spread of the 321 GHz line is much smaller than that of the 22 GHz line, but the strongest emission in both lines is at similar velocities.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences

More Article Retrieval Options

HELP for Article Retrieval

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
arXiv e-prints