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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
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
EISSN1365-2966
Volume450Issue:3Pages:2915-2921
Corresponding Author翁山杉 ; 张双南
SubtypeArticle
AbstractXTE 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).
Keywordaccretion accretion discs stars: distances stars: neutron X-rays: bursts X-rays: individual (XTE J1810-189)
Subject AreaAstronomy & Astrophysics
DOI10.1093/mnras/stv815
Indexed BySCI ; INSPIREHEP ; ADS
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000356339300051
ADS Bibcode2015MNRAS.450.2915W
ADS URLhttps://ui.adsabs.harvard.edu/abs/2015MNRAS.450.2915W
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2015MNRAS.450.2915W/citations
inspireid1406101
inspireURLhttps://inspirehep.net/literature/1406101
Citation statistics
Cited Times:7 [INSPIRE]
Cited Times:8 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/228411
Collection粒子天体物理中心
Recommended Citation
GB/T 7714
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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