Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002apj...580l.161w&link_type=abstract
The Astrophysical Journal, Volume 580, Issue 2, pp. L161-L165.
Astronomy and Astrophysics
Astronomy
34
Ism: H Ii Regions, Ism: Individual: Alphanumeric: Rcw 38, Stars: Formation, X-Rays: Diffuse Background, X-Rays: Stars
Scientific paper
We report on results of a 96.7 ks Chandra observation of one of the youngest, most embedded and massive young stellar clusters studied to date in X-rays-RCW 38. We find a region of extended emission about 1.25×1.75 pc. The emission is consistent with synchrotron emission. The power index of the emission steepens toward the cluster core, implying that the magnetic field originates there. This is the first evidence of synchrotron emission filling a region of active star formation. The source of the necessary magnetic field is unclear. We measure the hydrogen column to the emission and find that NH increases from 7.6×1021 to 1.61×1022 cm-2, increasing from the northwest to the southeast quadrants of the cluster, consistent with near-infrared extinction data.
Alves J. J.
Bourke Tyler L.
Smith Randall K.
Spitzbart Bradley
Wolk Scott J.
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