Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...290..587s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 290, March 15, 1985, p. 587-595.
Astronomy and Astrophysics
Astronomy
85
Infrared Stars, Nebulae, Plasma Jets, Pre-Main Sequence Stars, Radio Sources (Astronomy), Gas Ionization, Gas Jets, Molecular Clouds, Photographic Plates, Radio Spectra
Scientific paper
New high-sensitivity radio continuum and optical observations of jets associated with the recently formed star IRS 5 are presented. The observations suggest that IRS 5 is the source of a collimated high-velocity outflow of partially ionized gas that produces the observed bipolar molecular outflow in L1551. The emission from the jets can be traced for over 10 arcsec from IRS 5; the jets are aligned with the axis of the molecular bipolar outflow observed by Snell, Loren, and Plambeck (1981). The integrated radio spectrum of the jets is flat, indicating emission by an optically thin plasma. The total mass of ionized gas is estimated to be 0.4-8 x 10 to the -6th solar mass. The absence of optical emission from the northeast jet is best explained by the presence of a dense disk of gas that lies perpendicular to the outflow axis which obscures the northeast jet and may also be responsible for collimating the outflow into two initially opposed jets.
Bally John
Snell Ronald L.
Strom Karen M.
Strom Stephen E.
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