AAS 205th Meeting, 9-13 January 2005
Session 105 Triggered Star Formation and the Orion Protostellar Population
Poster, Wednesday, January 12, 2005, 9:20am-6:30pm, Exhibit Hall

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[105.04] Chandra Observations of Triggered Star Formation in Cepheus

K.V. Getman, L.K. Townsley, P.S. Broos, E.D. Feigelson, G.P. Garmire, M. Tsujimoto (Penn State University)

We present the first high-spatial-resolution X-ray images and spectra of the Cepheus B/Sharpless 155 interface region, obtained in a single 30-ksec Chandra/ACIS observation in March 2003. This rich high-mass star-forming region reveals a complex mix of point source and diffuse X-ray emission. The OB association Cep OB3b is resolved at the arcsecond level into more than 400 sources. An embedded stellar cluster, representing the most recent generation of star formation at the S155/CepB interface, is resolved into several components. Soft diffuse X-ray emission (kT=0.8 keV) centered on the O7 star HD 217086 pervades the complex. A remarkably strong X-ray flare is seen in one of the pre-main-sequence cluster members. These and other highlights of the Chandra data will be described.

This work is supported by NASA contract NAS8-38252 (G.P. Garmire, PI).

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© 2004. The American Astronomical Society.