Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...223..267p&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 223, no. 1-2, Oct. 1989, p. 267-270.
Astronomy and Astrophysics
Astronomy
6
Infrared Sources (Astronomy), Interstellar Masers, Molecular Clouds, Pre-Main Sequence Stars, Water Masers, Far Infrared Radiation, Luminosity, T Tauri Stars, Water Vapor
Scientific paper
This paper presents the results of repeated H2O maser line observations (22.2 GHz) in the Serpens region obtained with the 32-m parabola of the Medicina Station over a period of 16 months. Several positions coincident with pre-main-sequence objects and far-infrared sources were observed, with no positive detection at an average rms = 1.5 Jy. In addition, three regions were mapped: the cloud molecular core, the Ser/G3-G6 complex, and the strong IRAS source 18278+O111. Only within the core, and only in one out of six observing runs, a feature of 48 Jy was observed. This line coincides in position and velocity with one of the two masers reported by Blair et al. (1975), but never detected since then.
Giovanardi Carlo
Palla Fabrizio
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