Publications of the Astronomical Society of Japan | |
Discovery of X-Ray Emission from a Radio Supernova Remnant G352.7-0.1 | |
Dotani, Tadayasu3  Yamauchi, Shigeo2  Koyama, Katsuji4  Tsunemi, Hiroshi1  Kinugasa, Kenzo1  Torii, Ken'ichi1  | |
[1] Department of Earth and Space Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043 E-mail(KK):;Faculty of Humanities and Social Sciences, Iwate University, 3-18-34 Ueda, Morioka, Iwate 020-8550;The Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510;Department of Physics, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502 | |
关键词: Abundances; "ISM: individual objects (G352.7-0.1)"; "ISM: supernova remnants"; "X-rays: sources"; "X-rays: spectra"; | |
DOI : 10.1093/pasj/50.2.249 | |
学科分类:天文学(综合) | |
来源: Oxford University Press | |
【 摘 要 】
WereportonthefirstdetectionofX-raysfromtheradiosupernovaremnant(SNR)G352.7-0.1withtheASCAGalacticPlaneSurveyProject.AnX-rayimagewithashell-likemorphologysimilartothatoftheradiobandandaspectrumwithprominentK-shelllinesfromhighlyionizedSi,S,andArarepresented.ThesefeaturesprovideconvincingevidencethattheX-raysareduetoashock-heatedopticallythinhotplasma.Thespectraarerepresentedbyanon-equilibriumionization(NEI)modelwithanelectrontemperatureofkT∼2.0keV,anionizationparameterof$$ausim10^{11.0}$$cm−3s,andanabsorptionof$$N_extrmHsim2.9imes10^{22}$$cm−2.WereportonevidenceofoverabundancesofSiandSof∼3.7and∼3.4,relativetothesolarvalues,respectively.ThelargeabsorptionindicatesthatG352.7–0.1isneartothegalacticcenterregionand,afterremovingtheabsorption,theX-rayfluxinthe1–10keVbandisestimatedtobe$$F_extrmX(1-10extrm{kev})sim1.2imes10^{-11}extrm{ergcm}^{-2}extrms^{-2}$$.AssumingtheSNRtobeintheSedovphaseandneartothegalacticcenter(8.5kpc),G352.7-0.1isestimatedtohaveaSNexplosionenergyandageof$$E_extrm{SN}sim2imes10^{50}$$ergand$$t_{extrmage}sim2200$$yr,respectively;hence,itisamiddle-agedSNR.
【 授权许可】
Unknown
【 预 览 】
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