Astronomy and Astrophysics – Astronomy
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...316..265s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 316, May 1, 1987, p. 265-274.
Astronomy and Astrophysics
Astronomy
27
Early Stars, Infrared Astronomy, Line Spectra, Stellar Spectra, Emission Spectra, Hydrogen Clouds, Mass Flow Rate, Star Formation, Stellar Mass Ejection, Stellar Winds
Scientific paper
The authors have observed the low-luminosity young stellar objects B5 IRS 1, L 1262, L 1489, L 1536, L 1551 IRS 5, and L 1582 in the infrared recombination lines of Brα and/or Brγ, and in the 5 GHz continuum. Line emission was detected from B5 IRS 1 in Brα, and from L 1536 in Brα and Brγ. Limits to the line flux from the other sources are derived. All have radio continuum fluxes <0.5 mJy at 6 cm. New upper limits of 1×10-20W cm-2 are set to the Brα flux from the double radio source in L 1455, and from NGC 2071 IRS 1, 2, and 3. The results indicate that low-luminosity outflow sources have strong ionized winds, despite the fact that their stellar ultraviolet production is relatively modest. The data also provide an indication that winds from low-luminosity objects possess a wide range of outflow parameters. A quantitative analysis of the data in terms of various stellar wind models is presented.
Fischer Jan
Geballe Thomas Ronald
Schwartz Phil R.
Smith Howard A.
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