X-Ray Observations of the Sagittarius D HII Region toward the Galactic Center with Suzaku

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dc.creatorSawada, Makoto
dc.creatorTsujimoto, Masahiro
dc.creatorKoyama, Katsuji
dc.creatorLaw, Casey J.
dc.creatorTsuru, Takeshi Go
dc.creatorHyodo, Yoshiaki
dc.date2008-05-14
dc.date.accessioned2026-07-07T09:38:49Z
dc.date.available2026-07-07T09:38:49Z
dc.descriptionWe present a Suzaku X-ray study of the Sagittarius D (Sgr D) HII region in the Galactic center region. Two 18'x18' images by the X-ray Imaging Spectrometer (XIS) encompass the entire Sgr D complex. Thanks to the low background, XIS discovered two diffuse sources with low surface brightness and obtained their high signal-to-noise ratio spectra. One is associated with the core of the Sgr D HII region, arising from the young stellar cluster. The other is a new object in the vicinity of the region. We also present 3.5 cm and 6.0 cm radio continuum maps of the new source using the 100 m Green Bank Telescope. We conclude that the source is a new supernova remnant (SNR; G1.2--0.0) based on: (1) the 0.9+/-0.2 keV thermal X-ray spectrum with emission lines from highly ionized atoms; (2) the diffuse nature with an apparent extent of ~10 pc at the Galactic center distance inferred from the X-ray absorption (~8.5x10^{22} cm^{-2}); and (3) the nonthermal radio continuum spectral index (~-0.5). Our discovery of an SNR in the Sgr D HII region leads to a revision of the view of this system, which had been considered to be a thermal HII region and its environment.
dc.descriptionAccepted for publication in PASJ
dc.identifierhttps://arxiv.org/abs/0805.2079
dc.identifierhttp://arxiv.org/abs/0805.2079
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/160952
dc.subjectAstrophysics
dc.titleX-Ray Observations of the Sagittarius D HII Region toward the Galactic Center with Suzaku
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