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X-ray softening during the 2008 outburst of XTE J1810-189
Weng SS(翁山杉); Zhang SN(张双南); Yi SX(易疏序); Rong Y(容昱); Weng, SS; Zhang, SN; Yi, SX; Rong, Y; Gao, XD
2015
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号450期号:3页码:2915-2921
通讯作者翁山杉 ; 张双南
文章类型Article
摘要XTE J1810-189 underwent an outburst in 2008, and was observed over similar to 100 d by RXTE. Performing a time-resolved spectral analysis on the photospheric radius expansion burst detected on 2008 May 4, we obtain the source distance in the range 3.5-8.7 kpc for the first time. During its outburst, XTE J1810-189 did not enter into the high/soft state, and both the soft and hard colours decreased with decreasing flux. The fractional rms remained at high values (similar to 30 per cent). The RXTE/PCA spectra for 3-25 keV can be described by an absorbed power-law component with an additional Gaussian component, and the derived photon index I" increased from 1.84 +/- A 0.01 to 2.25 +/- A 0.04 when the unabsorbed X-ray luminosity at 3-25 keV dropped from 4 x 10(36) to 6 x 10(35) erg s(-1). The relatively high flux, dense observations and broad-band spectra are strong evidence that the softening behaviour detected in the outburst of XTE J1810-189 originates from the evolution of a non-thermal component rather than the thermal component (i.e. neutron star surface emission).
关键词accretion accretion discs stars: distances stars: neutron X-rays: bursts X-rays: individual (XTE J1810-189)
学科领域Astronomy & Astrophysics
DOI10.1093/mnras/stv815
收录类别SCI
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000356339300051
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228411
专题粒子天体物理中心
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Weng SS,Zhang SN,Yi SX,et al. X-ray softening during the 2008 outburst of XTE J1810-189[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,450(3):2915-2921.
APA 翁山杉.,张双南.,易疏序.,容昱.,Weng, SS.,...&Gao, XD.(2015).X-ray softening during the 2008 outburst of XTE J1810-189.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,450(3),2915-2921.
MLA 翁山杉,et al."X-ray softening during the 2008 outburst of XTE J1810-189".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 450.3(2015):2915-2921.
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