Spectral analysis of SMC X-2 during its 2015 outburst

被引：16

作者：

La Palombara, N. ^{[1
]}

Sidoli, L. ^{[1
]}

Pintore, F. ^{[1
]}

Esposito, P. ^{[1
]}

Mereghetti, S. ^{[1
]}

Tiengo, A. ^{[1
,2
,3
]}

机构：

[1] INAF, Ist Astrofis Spaziale & Fis Cosm, Via E Bassini 15, I-20133 Milan, Italy

[2] Ist Univ Super, Piazza Vittoria 15, I-27100 Pavia, Italy

[3] Ist Nazl Fis Nucl, Sez Pavia, Via A Bassi 6, I-27100 Pavia, Italy

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2016年 / 458卷 / 01期

关键词：

stars: neutron; X-rays: binaries; X-rays: individual: SMC X-2; SMALL-MAGELLANIC-CLOUD; PULSAR RX J0059.2-7138; PHOTON IMAGING CAMERA; BE/X-RAY BINARIES; X-RAY; XMM-NEWTON; SOFT EXCESS; SYSTEMS; ABUNDANCES; PARAMETERS;

D O I：

10.1093/mnrasl/slw020

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on the results of XMM-Newton and Swift observations of SMC X-2 during its last outburst in 2015 October, the first one since 2000. The source reached a very high luminosity (L similar to 10(38) erg s(-1)), which allowed us to perform a detailed analysis of its timing and spectral properties. We obtained a pulse period P-spin = 2.372267(5) s and a characterization of the pulse profile also at low energies. The main spectral component is a hard (Gamma similar or equal to 0) power-law model with an exponential cut-off, but at low energies we detected also a soft (with kT similar or equal to 0.15 keV) thermal component. Several emission lines are present in the spectrum. Their identification with the transition lines of highly ionized N, O, Ne, Si, and Fe suggests the presence of photoionized matter around the accreting source.

引用

页码：L74 / L78

页数：5

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