X Marks the Spot: Nexus of Filaments, Cores, and Outflows in a Young Star-forming Region

Nia Imara, Charles Lada, John Lewis, John H. Bieging, Shuo Kong, Marco Lombardi, Joao Alves

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

We present a multiwavelength investigation of a region of a nearby giant molecular cloud that is distinguished by a minimal level of star formation activity.With our new 12CO(J=2-1) and 13CO(J=2-1) observations of a remote region within the middle of the California molecular cloud, we aim to investigate the relationship between filaments, cores, and a molecular outflow in a relatively pristine environment. An extinction map of the region from Herschel Space Observatory observations reveals the presence of two 2 pc long filaments radiating from a highextinction clump. Using the 13CO observations, we show that the filaments have coherent velocity gradients and that their mass-per-unit-lengths may exceed the critical value above which filaments are gravitationally unstable. The region exhibits structure with eight cores, at least one of which is a starless, prestellar core. We identify a lowvelocity, low-mass molecular outflow that may be driven by a flat spectrum protostar. The outflow does not appear to be responsible for driving the turbulence in the core with which it is associated, nor does it provide significant support against gravitational collapse.

Original languageEnglish (US)
Article number119
JournalAstrophysical Journal
Volume840
Issue number2
DOIs
StatePublished - May 10 2017

Keywords

  • ISM: clouds
  • ISM: jets and outflows
  • ISM: kinematics and dynamics
  • ISM: structure
  • dust, extinction
  • stars: formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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