Deep imaging surveys of star-forming clouds. IV. The meek and the mighty: Outflows from, young stars in chamaeleon

John Bally, Josh Wala Wender, Kevin L. Luhman, Giovanni Fazio

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

We present a survey of shocks and outflows in the Chamaeleon I star-forming complex using Ha, [S II], and SDSS i′ images obtained from the ground, an i′ image obtained with the Bubble Space Telescope, and 4.5 μm images obtained with the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. We find new Herbig-Haro (HH) objects and extensions to the previously cataloged shocks that trace parts of at least 20 distinct outflows from young stars. Some HH objects mark the presence of giant outflows, the largest of which is powered by Cha-MMSl and associated with HH 49/50 near the Ced 110 region. Other large flows are powered by Cha-MMS2 in the Ced 112 region and the IRN in the Ced 111 region. Although some shocks exhibit infrared emission in the IRAC bands, most notably HH 49/50 (the "tornado"), most outflows in the Cha I clouds are not detected in the Spitzer IRAC bands. This result is consistent with the general lack of extensive 2.12 μm H2 emission from Cha I.

Original languageEnglish (US)
Pages (from-to)1923-1937
Number of pages15
JournalAstronomical Journal
Volume132
Issue number5
DOIs
StatePublished - Nov 2006

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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