FREE-FREE RADIO EMISSION FROM YOUNG STELLAR OBJECTS

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

25 Scopus Citations
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Author(s)

  • Hsien SHANG
  • Susana LIZANO
  • Al GLASSGOLD
  • Frank SHU

Detail(s)

Original languageEnglish
Pages (from-to)L69–L72
Journal / PublicationAstrophysical Journal
Volume612
Issue number1
Online published5 Aug 2004
Publication statusPublished - 1 Sep 2004
Externally publishedYes

Abstract

We calculate the centimeter wavelength free-free emission of the jets of young stellar objects (YSOs) with the X-wind model enhanced by a variety of physical processes. Using parameters characteristic of a Class I YSO with a mass-loss rate of ∼10-6 M yr-1, we obtain a 3.6 cm map and a spectral index that compare well with high spatial resolution observations of L1551 1RS 5. Models with lower mass-loss rates, appropriate for Class II YSOs with revealed optical jets, produce radio jets that are too weak to be detected at current sensitivity levels. In addition to demonstrating the consistency of the density distribution of the X-wind model with observations, we are able to obtain information on the processes that heat and ionize the inner jet, i.e., X-ray ionization and shock heating and ionization.

Citation Format(s)

FREE-FREE RADIO EMISSION FROM YOUNG STELLAR OBJECTS. / SHANG, Hsien; LIZANO, Susana; GLASSGOLD, Al; SHU, Frank.

In: Astrophysical Journal, Vol. 612, No. 1, 01.09.2004, p. L69–L72.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review