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| Query : 2002ApJ...580L.161W |
2002ApJ...580L.161W - Astrophys. J., 580, L161-L165 (2002/December-1)
Discovery of nonthermal X-ray emission from the embedded massive star-forming region RCW 38.
WOLK S.J., BOURKE T.L., SMITH R.K., SPITZBART B. and ALVES J.
Abstract (from CDS):
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 1.25x1.75 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 NHincreases from 7.6x1021 to 1.61x1022 cm–2, increasing from the northwest to the southeast quadrants of the cluster, consistent with near-infrared extinction data.
Abstract Copyright: ∼
Journal keyword(s): ISM: H II Regions - ISM: Individual: Alphanumeric: RCW 38 - Stars: Formation - X-Rays: Diffuse Background - X-Rays: Stars
Simbad objects: 9
| Number of rows : 9 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2026 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | * tet01 Ori C | SB* | 05 35 16.4662967280 | -05 23 22.921811880 | 4.20 | 5.15 | 5.13 | 4.91 | 4.73 | O7Vp | 1479 | 1 |
| 2 | * zet Ori | ** | 05 40 45.52666 | -01 56 33.2649 | 0.50 | 1.56 | 1.77 | 1.85 | 2.05 | O9.7Ib+B0III | 375 | 0 |
| 3 | NAME Rosette Nebula | HII | 06 32 26.76 | +04 47 37.1 | ~ | 522 | 1 | |||||
| 4 | * zet Pup | BY* | 08 03 35.04754 | -40 00 11.3321 | 0.89 | 1.98 | 2.25 | 2.36 | 2.58 | O4I(n)fp | 1190 | 1 |
| 5 | RCW 38 | SFR | 08 59 05.50 | -47 30 39.4 | ~ | 327 | 2 | |||||
| 6 | [FP74] RCW 38 IRS 2 | Y*O | 08 59 05.6555109888 | -47 30 40.941723780 | 14.05 | 11.20 | O5.5V | 29 | 1 | |||
| 7 | NGC 3603 | OpC | 11 14 57.9 | -61 14 32 | ~ | 1136 | 1 | |||||
| 8 | NAME Lupus SN | SNR | 15 02 22.1 | -42 05 49 | ~ | 1407 | 1 | |||||
| 9 | NAME Arches Cluster | Cl* | 17 45 50.5 | -28 49 28 | ~ | 792 | 0 |
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