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NAM2012 - All Presentation Details

Record 261 of 756

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Stellar life and death in a grand-design spiral galaxy

Author: Roberto Soria

ICRAR

Co-Authors: K.D. Kuntz (JHU), K.S. Long (STScI), W.P. Blair (JHU), P.F. Winkler (Middlebury College), L.E.H. Godfrey (ICRAR), J.C.A. Miller-Jones (ICRAR), P.P. Plucinsky (CfA), P. Ghavamian (STScI), B.C. Whitmore (STScI), C.J. Stockdale (Marquette University)

Session: HE3: Multi-wavelength observations of compact objects

Presentation type: Talk      12:45  Friday 30th 11:45-13:15 

Summary:

We are conducting a multiwavelength study of star formation and death in the nearby spiral galaxy M83. We combine deep Chandra observations (750 ks), HST coverage in 7 filters (50 orbits), Magellan and Gemini images, and ATCA radio maps. We measure and model the relative distributions of HII regions, hot gas, young supernova remnants (SNRs), and various types of X-ray binaries. We detect almost 700 X-ray sources: at least 100 of them are young SNRs (age <~ 3000 yrs); the rest are mostly high mass X-ray binaries. This is more than the corresponding populations found in the Milky Way to date, and they are all at a similar, known distance. We discovered a transient ultraluminous X-ray source with a low-mass donor, still a largely unexplored class. We followed the radio decline of SN1957D and the appearance of a hard X-ray source at its position (a young Crab-like pulsar?) We are currently studying the intrinsic and environmental differences between X-ray, radio- and optically-bright SNR.

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