Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...694..425s&link_type=abstract
The Astrophysical Journal, Volume 694, Issue 1, pp. 425-437 (2009).
Astronomy and Astrophysics
Astronomy
1
Ism: Herbig-Haro Objects, Ism: Individual: L1251 Hh 189, Stars: Formation, Stars: Pre-Main Sequence, X-Rays: Stars
Scientific paper
I report the results of a 60 ks X-ray observation of the L1251 dark cloud in Cepheus, which was acquired with the ACIS-I camera on board the Chandra X-Ray Observatory. Forty-three compact X-ray sources were detected. The field of view was centered on the position of IRAS 22376+7455, an embedded Class 0/I protostar that is closely associated with the bright CO emission core, L1251B-Core E. A very intense impulsive X-ray flare was observed from a location within the formal error ellipse of the IRAS source and in close proximity (within lsim1'') to a thermal continuum radio source, VLA 3. Given their small spatial offsets, the radio, far-infrared, and X-ray objects appear to be identical and consequently the likely origin and driving source of high-velocity gas flows that are observed in L1251B.
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