Berkeley 87: A Young Cluster Embedded in a Supersonic Wolf-Rayet Wind

Details Berkeley 87: A Young Cluster Embedded in a Supersonic Wolf-Rayet Wind Berkeley 87: A Young Cluster Embedded in a Supersonic Wolf-Rayet Wind

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cxo..prop.2526s&link_type=abstract

Chandra proposal ID #10200267

Computer Science

Scientific paper

The young open cluster Berkeley 87 in Cygnus (age 1 - 2 Myr; d = 950 kpc) is the only galactic cluster known to harbor a rare oxygen-type Wolf-Rayet star (WR 142). This WO-type star is in a highly-evolved pre-supernova state and its supersonic wind (v = 5500 km/s) is producing dissipative shock waves, as traced by diffuse optical CIV emission. Berk 87 shows clear signs of high-mass star formation including OH masers and compact HII regions. We propose to observe Berk 87 with ACIS-I. This observation will test theories of X-ray production in massive stars and determine if diffuse X-rays from the shocked WR wind are present.

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