Vibrationally excited CS: A new probe of conditions in young protostellar systems

Christopher K. Walker, Philip R. Maloney, E. Serabyn

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

We present the first detection of vibrationally excited C32S J = 10 → 9 and J = 7 → 6 emission toward a young stellar object. Toward IRAS 16293-2422, the vibrationally excited C32S emission is redshifted ∼3.9 km s-1 from the systemic velocity of the core. The emission must arise in warm (T ≳ 1000 K), dense (n ≳ 1011-1012 cm-3) gas. The most plausible origin for the emission appears to be self-gravitating instabilities in a protostellar accretion disk, which produce waves and shocks.

Original languageEnglish (US)
Pages (from-to)L127-L130
JournalAstrophysical Journal
Volume437
Issue number2 PART 2
StatePublished - Dec 20 1994

Keywords

  • Binaries: general
  • Stars: individual (IRAS 16293-2422)
  • Stars: pre-main-sequence

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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