H2O sources in regions of star formation

Abstract

view Abstract Citations (117) References (39) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS H2O sources in regions of star formation. Lo, K. Y. ; Burke, B. F. ; Haschick, A. D. Abstract Regions and objects believed to be in early stages of stellar formation have been searched for H2O 22-GHz line emission with the Haystack 120-foot telescope. The objects include radio condensations, infrared objects in H II regions, and Herbig-Haro objects. Nine new H2O sources were detected in the vicinity of such objects, including the Sharpless H II regions S152, S235, S255, S269, G45.1 + 0.1, G45.5 + 0.1, AFCRL infrared object No. 809-2992, and Herbig-Haro objects 1 and 9. The new H2O sources detected in H II regions are associated, but not coincident, with the radio condensations. Water vapor line emission was detected in 25 per cent of the regions searched. The association of H2O sources with regions of star formation is taken to be real. The spatial relationship of H2O sources to infrared objects, radio condensations, class I OH sources, and molecular clouds are discussed. The suggestion is made that an H2O source may be excited by a highly obscured star of extreme youth. Publication: The Astrophysical Journal Pub Date: November 1975 DOI: 10.1086/153954 Bibcode: 1975ApJ...202...81L Keywords: Interstellar Matter; Radio Sources (Astronomy); Star Formation; Water Vapor; Emission Spectra; H Ii Regions; Line Spectra; Main Sequence Stars; Molecular Spectra; Nebulae; Spatial Distribution; Astrophysics full text sources ADS | data products SIMBAD (21)