Radio continuum observations of IRAS sources associated with dense cores

Details Radio continuum observations of IRAS sources associated with dense cores Radio continuum observations of IRAS sources associated with dense cores

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347..461r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 347, Dec. 1, 1989, p. 461-467. Research supported by CONACYT.

Astronomy and Astrophysics

Astronomy

54

Early Stars, Infrared Sources (Astronomy), Radio Emission, Star Formation, Infrared Astronomy Satellite, Stellar Luminosity, Stellar Radiation, Stellar Winds, Very Large Array (Vla)

Scientific paper

Using the VLA, the continuum emission associated with IRAS sources embedded in dense cores was searched for at 6 cm. Two new sources, 04016 + 2610 in L1489 and 19243 + 2350 in L778, were detected. The embedded sources have low luminosity (L less than about 10 solar luminosities). As in other similar sources, if the emission is free-free, the stellar radiation cannot account for the observed ionization rate. Two models that have been proposed to explain the radio continuum emission from low-luminosity stars are those of (partially) ionized winds and shock-induced ionization. For the two new sources and a previously reported one (HL Tau), the associated molecular outflow is of modest power. It is shown that, under these conditions, these models, at least in their simplest versions, do not provide sufficient ionized gas. The nature of the radio continuum emission from low-luminosity young stars remains unexplained.

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