AAS 199th meeting, Washington, DC, January 2002
Session 124. H II Regions
Display, Thursday, January 10, 2002, 9:20am-4:00pm, Monroe/Lincoln

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[124.04] Chandra/ACIS Observations of Rosette: Diffuse X-rays Discovered in a Galactic H II Region

L. K. Townsley, E. D. Feigelson, P. S. Broos (PSU), Y.-H. Chu (UIUC), T. Montmerle (Centre d'Etudes de Saclay)

We present the first high-spatial-resolution X-ray images of the Rosette Nebula and Rosette Molecular Cloud (RMC), obtained in a series of 4 20-ksec snapshots with the Advanced CCD Imaging Spectrometer aboard the Chandra X-ray Observatory in January 2001. These images form a striking 1-degree X-ray panorama of a rich high-mass star formation region. The OB association is resolved at the arcsecond level into >300 sources. The other 3 pointings step across the RMC, with >100 X-ray sources in each. Soft diffuse emission is seen at the center of the H~II region and is resolved from the point source population. This extended emission is most likely from the fast O-star winds, which thermalize and shock the surrounding media.

Support for this effort was provided by the Chandra X-ray Observatory GO2 grant G01-2008X.

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