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Detection of radio continuum emission from Herbig-Haro objects 1 and 2 and from their central exciting sourceThe region in Orion containing HH 1 and HH 2 was observed with the VLA at 20, 6, and 2 cm on several occasions from 1981 to 1984. At lower resolution, four continuum sources were detected. Two of these sources coincide positionally with HH 1 and HH 2. At 6 cm and higher resolution, HH 1 is resolved into at least two components. The emission is probably bremsstrahlung originating in the same region where the visible line emission is produced. This is the first detection of radio continuum from classic Herbig-Haro objects. At a position closely centered between HH 1 and HH 2, an object that can be interpreted as the energy source of the system was detected. The central source spectrum is S(nu) of about nu to the alpha power, where alpha = 0.4 + or - 0.2, suggesting a stellar wind. Finally, the fourth radio continuum source coincides positionally with an H2O maser and is probably excited by an independent star. There is evidence of time variability in its radio flux. No emission was detected from the Cohen-Schwartz (1979) star at the 0.1 mJy level.
Document ID
19850054890
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Pravdo, S. H.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena, CA; National Radio Astronomy Observatory, Green Bank WV, United States)
Rodriguez, L. F.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Curiel, S.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Canto, J.
(Universidad Nacional Autonoma de Mexico, Mexico City, Mexico; National Radio Astronomy Observatory, Green Bank WV, United States)
Torrelles, J. M.
(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA; National Radio Astronomy Observatory, Green Bank WV, United States)
Becker, R. H.
(California, University Davis, CA; National Radio Astronomy Observatory, Green Bank, WV, United States)
Sellgren, K.
(Hawaii, University Honolulu, HI; National Radio Astronomy Observatory, Green Bank, WV, United States)
Date Acquired
August 12, 2013
Publication Date
June 1, 1985
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters to the Editor
Volume: 293
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
85A37041
Funding Number(s)
CONTRACT_GRANT: CONACYT-PCCBBEU-020510
Distribution Limits
Public
Copyright
Other

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