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

Autor(en)

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

Abstrakt

We present a multiwavelength investigation of a region of a nearby giantmolecular cloud that is distinguished by a minimal level of starformation activity. With our new 12CO(J = 2-1) and 13CO(J = 2-1) observations of a remote regionwithin the middle of the California molecular cloud, we aim toinvestigate the relationship between filaments, cores, and a molecularoutflow in a relatively pristine environment. An extinction map of theregion from Herschel Space Observatory observations reveals the presenceof two 2 pc long filaments radiating from a high-extinction clump. Usingthe 13CO observations, we show that the filaments havecoherent velocity gradients and that their mass-per-unit-lengths mayexceed the critical value above which filaments are gravitationallyunstable. The region exhibits structure with eight cores, at least oneof which is a starless, prestellar core. We identify a low-velocity,low-mass molecular outflow that may be driven by a flat spectrumprotostar. The outflow does not appear to be responsible for driving theturbulence in the core with which it is associated, nor does it providesignificant support against gravitational collapse.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Harvard-Smithsonian Center for Astrophysics, University of Arizona, Yale University, Università degli Studi di Milano-Bicocca

Journal

The Astrophysical Journal

Band

840

Anzahl der Seiten

15

ISSN

0004-637X

DOI

https://doi.org/10.3847/1538-4357/aa6d74

Publikationsdatum

05-2017

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik

Schlagwörter

ASJC Scopus Sachgebiete

Astronomy and Astrophysics, Space and Planetary Science

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/4de6f2a9-b427-4827-84d6-cc7c373e31b3