A multiwavelength study of 1WGA J1346.5-6255: A new gamma Cas analog unrelated to the background supernova remnant G309.2-00.6

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	A multiwavelength study of 1WGA J1346.5-6255: A new gamma Cas analog unrelated to the background supernova remnant G309.2-00.6
	Safi-Harb, S; Ribo, M; Butt, Y; Matheson, H; Negueruela, I; Lu, FJ; Jia, SM; Chen, Y; Lu FJ(卢方军); Jia SM(贾淑梅)
刊名	ASTROPHYSICAL JOURNAL
	2007
卷号	659 期号:1 页码:407-418
关键词	ISM : abundances ISM : individual (G309.2-00.6) open clusters and associations : individual (NGC 5281) stars : emission-line, Be stars : individual (HD 119682) X-rays : individual (1RXS J134633.6-625528, 1WGA J1346.5-6255, SNR G309.2-00.6)
通讯作者	Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada ; George Washington Univ, Dept Phys, Washington, DC 20052 USA ; Univ Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, Spain ; Univ Paris 07, CEA Saclay, CNRS,Serv Astrophys, UMR 7158,DSM,DAPNIA, F-91191 Gif Sur Yvette, France ; Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA ; Univ Alacant, Escuela Politecn Super, Dept Fis Ingn Sistemas & Teoria Senal, Alicante 03080, Spain ; Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astophys, Beijing 100049, Peoples R China
英文摘要	1WGA J1346.5-6255 is a ROSAT X-ray source found within the radio lobes of the supernova remnant (SNR) G309.2-00.6. It appears to coincide with the bright and early-type star HD 119682, in the galactic open cluster NGC 5281. Its radiomorphology, consisting of two brightened and distorted arcs of emission on opposite sides of the 1WGA J1346.5-6255 source and of a jetlike feature and break in the shell, suggest that 1WGA J1346.5-6255/G309.2-00.6 is a young analog of the microquasar powering the W50 nebula SS 433. This motivated us to study this source at X-ray and optical wavelengths. We present new Chandra observations of 1WGA J1346.5-6255, archival XMM-Newton observations of G309.2-00.6, and optical spectroscopic observations of HD 119682, to search for X-ray jets from 1WGA J1346.5-6255, study its association with the SNR, and test for whether HD 119682 represents its optical counterpart. We find no evidence for jets from 1WGA J1346.5-6255 down to an unabsorbed flux of 2.6 x 10(-13) ergs cm(-2) s (0.5-7.5 keV), we rule out its association with G309.2-00.6, and we confirm that HD 119682 is its optical counterpart. We derive a distance of 1.2 x 0.3 kpc, consistent with the distance estimate to NGC 5281 (1.3 +/- 0.3 kpc), and much smaller than the distance derived to G309.2-00.6. We discuss the nature of the source, unveil that HD 119682 is a Be star, and suggest it is a new member of the recently proposed group of gamma Cas analogs. The Chandra and XMM-Newton X-ray light curves show variability on timescales of hundreds of seconds, and the presence of a possible period of similar to 1500 s that could be the rotational period of an accreting neutron star or white dwarf in this gamma Cas analog.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
原文出处	SCI
语种	英语
WOS记录号	WOS:000245773300034
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/237348]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Safi-Harb, S,Ribo, M,Butt, Y,et al. A multiwavelength study of 1WGA J1346.5-6255: A new gamma Cas analog unrelated to the background supernova remnant G309.2-00.6[J]. ASTROPHYSICAL JOURNAL,2007,659(1):407-418.
APA	Safi-Harb, S.,Ribo, M.,Butt, Y.,Matheson, H.,Negueruela, I.,...&陈勇.(2007).A multiwavelength study of 1WGA J1346.5-6255: A new gamma Cas analog unrelated to the background supernova remnant G309.2-00.6.ASTROPHYSICAL JOURNAL,659(1),407-418.
MLA	Safi-Harb, S,et al."A multiwavelength study of 1WGA J1346.5-6255: A new gamma Cas analog unrelated to the background supernova remnant G309.2-00.6".ASTROPHYSICAL JOURNAL 659.1(2007):407-418.