ChandraObservation of the X‐Ray Source Population of NGC 6946 | Zendy

S. S. Holt | Zendy; E. M. Schlegel | Zendy; Una Hwang | Zendy; Robert Petre | Zendy

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ChandraObservation of the X‐Ray Source Population of NGC 6946

Author(s) -

S. S. Holt,

E. M. Schlegel,

Una Hwang,

Robert Petre

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/374311

Subject(s) - physics , astrophysics , spiral galaxy , milky way , luminosity , galaxy , astronomy , nebula , galactic center , supernova remnant , pulsar , local group , pulsar wind nebula , population , supernova , stars , demography , sociology

We present the results of a study of discrete X-ray sources in NGC 6946 usinga deep Chandra ACIS observation. Based on the slope of the log N-log Sdistribution and the general correlation of sources with the spiral arms, weinfer that the overall discrete source sample in NGC 6946 is dominated by highmass X-ray binaries, in contrast to the source distributions in M31 and theMilky Way. This is consistent with the higher star formation rate in NGC 6946than in those galaxies. We find that the strong X-ray sources in the region ofthe galactic center do not correlate in detail with images of the region in thenear-IR, although one of them may be coincident with the galactic center. Thenon-central ultra-luminous X-ray source in NGC 6946, previously identified witha supernova remnant, has an X-ray spectrum and luminosity that is inconsistentwith either a traditional pulsar wind nebula or a blast wave remnant.Comment: accepted Ap

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