The Origin and Distribution of Diffuse Hot Gas in the Spiral Galaxy NGC 3184 | Zendy

N. E. Doane | Zendy; W. T. Sanders | Zendy; Eric Wilcots | Zendy; M. Juda | Zendy

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The Origin and Distribution of Diffuse Hot Gas in the Spiral Galaxy NGC 3184

Author(s) -

N. E. Doane,

W. T. Sanders,

Eric Wilcots,

M. Juda

Publication year - 2004

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/425627

Subject(s) - astrophysics , physics , surface brightness , luminosity , spiral galaxy , galaxy , thermal emission , brightness , star formation , astronomy , thermal , meteorology

Deep Chandra exposures reveal the presence of diffuse X-ray emission with aluminosity of 1.3x10^{39} ergs s^{-1} from the spiral galaxy NGC 3184. Thisappears to be truly diffuse thermal emission distinct from the low-luminosityLMXB emission. While the unresolved emission from older LMXBs is more uniformlydistributed across the galaxy, the diffuse X-ray emission is concentrated inareas of younger stellar populations and star forming regions. The surfacebrightness of the diffuse emission over the spiral arms is five times greaterthan in off-arm regions, and eight times brighter in H II regions than in non-HII regions. Spectral fits to the diffuse thermal emission are consistent with alow temperature component, T ~ 1.5 x 10^6 K, plus a higher temperaturecomponent, T ~ 5 x 10^6 K.Comment: 17 pages, 10 figures. Accepted for publication by The Astronomical Journa

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