Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 1G003

Investigations of Magnetic Activity Across YSO Classes: Multiwavelength Observations of the Star-forming Regions L1630 and L1622

Principe, David (Rochester Institute of Technology)
Sacco, Germano (INAF-Osservatorio Astrofisico di Arcetri)
Kastner, Joel (Rochester Institute of Technology )

The role of magnetic fields in star formation is presently the subject of intense debate. A combination of X-ray and infrared/submm observations of young stellar objects (YSOs) in active regions of star formation can elucidate the presence and strength of magnetic fields and the likely influence of such fields on protostellar collapse and the formation of circumstellar disks. Here, we present combined Chandra X-ray, Submillimeter Array (SMA), and archival infrared observations of L1630 and L1622, two particularly diverse star-forming regions in Orion. We have characterized the X-ray activity of dozens of YSOs in L1630, and conducted an SMA continuum and line imaging study to determine the submillimeter emission properties of X-ray-emitting YSOs in selected regions of the cloud. We have also established the association of X-ray activity and SMA continuum sources with the components of the HBC 515 multiple system in L1622. This system is composed of a very young (age < 1 Myr) intermediate-mass (~2 Solar mass) binary, which evidently has already dissipated its circumstellar disk; a low-mass protostar surrounded by a thick envelope of gas and dust; and two more widely separated, low-mass, pre-main sequence stars. It is hence an excellent system for testing various theories describing disk dispersal and multiple system interaction in the early stages of the star formation process.

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