A new bipolar outflow source in OMC-1

Lucy M Ziurys, T. L. Wilson, R. Mauersberger

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Observations of the J = 2 → 1 and J = 5 → 4 transitions of SiO have been made toward the outflow source ∼1′.5 south of Orion-KL, using the IRAM 30 m telescope, with 25″ and 13″ resolution, respectively. Additional measurements of the J = 2 → 1, 3 → 2, and 5 → 4 lines of C34S and observations of J = 5 → 4 and J = 13 → 12 transitions of CH3CN have been made with the 30 m telescope. The SiO data clearly indicate that a separate outflow source exists ∼ 100″ S and 20″ W of the Orion-KL/IRc2 position, centered at α= 5h32m45s.4, δ= -5°26′5″.0 (1950.0). The outflow region has a FWHP size of ∼ 25″ and is bipolar in nature, the redshifted emission peaking ∼ 10″ S of the center and the blueshifted emission peaking 5″ N of center. The direction of the Orion-S flow is therefore NS, in contrast to Orion-KL, where the flow is oriented EW. The maximum outflow velocity (FWZP) is ∼ 25 km s-1. An LVG analysis of the SiO and CS data indicate that densities in the outflow are at least 3 × 105 cm-3. Kinetic temperatures derived from CH3CN are consistent with T ∼ 100 K. The Orion-S flow may be driven by a young, highly obscured star.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume356
Issue number1 PART 2
StatePublished - Jun 10 1990
Externally publishedYes

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outflow
telescopes
stars
kinetics
temperature

Keywords

  • Interstellar: molecules
  • Nebulae: Orion Nebula
  • Stars: formation
  • Stars: winds

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Ziurys, L. M., Wilson, T. L., & Mauersberger, R. (1990). A new bipolar outflow source in OMC-1. Astrophysical Journal, 356(1 PART 2).

A new bipolar outflow source in OMC-1. / Ziurys, Lucy M; Wilson, T. L.; Mauersberger, R.

In: Astrophysical Journal, Vol. 356, No. 1 PART 2, 10.06.1990.

Research output: Contribution to journalArticle

Ziurys, LM, Wilson, TL & Mauersberger, R 1990, 'A new bipolar outflow source in OMC-1', Astrophysical Journal, vol. 356, no. 1 PART 2.
Ziurys LM, Wilson TL, Mauersberger R. A new bipolar outflow source in OMC-1. Astrophysical Journal. 1990 Jun 10;356(1 PART 2).
Ziurys, Lucy M ; Wilson, T. L. ; Mauersberger, R. / A new bipolar outflow source in OMC-1. In: Astrophysical Journal. 1990 ; Vol. 356, No. 1 PART 2.
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