X-RAY OBSERVATIONS OF THE VERY-FAINT X-RAY TRANSIENT XMMSL1 J171900.4-353217: A NEW CANDIDATE NEUTRON STAR LOW-MASS X-RAY BINARY

被引：0

作者：

Ahmed, O. ^{[1
,2
]}

Degenaar, N. ^{[3
]}

Wijnands, R. ^{[4
]}

Padilla, M. Armas ^{[5
]}

机构：

[1] King Abdulaziz Univ, Fac Sci, Astron & Space Sci Dept, Jeddah, Saudi Arabia

[2] Debre Tabor Univ, Fac Nat & computat Sci, Dept Phys, Debra Tabor, Ethiopia

[3] Univ Amsterdam, Anton Pannekoek Inst Astron, Amsterdam, Netherlands

[4] Inst Astrofis Canarias, Tenerife, Spain

[5] Univ La Laguna, Dept Astrofis, Tenerife, Spain

来源：

REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA | 2024年 / 60卷 / 02期

关键词：

binaries: general; ISM: abundances; stars:individual:XMMSL1 J171900.4-353217; stars: neutron; X-rays: binaries; LOW-LEVEL ACCRETION; GALACTIC-CENTER; MULTIWAVELENGTH OBSERVATIONS; MONITORING CAMPAIGN; TRUNCATED DISC; OUTBURST; BURSTS;

D O I：

10.22201/ia.01851101p.2024.60.02.18

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

XMMSL1 J171900.4-353217 is a very-faint X-ray transient that was discov-ered in 2010 March when it exhibited an outburst. We report on 7 observations,obtained with the X-Ray Telescope (XRT) aboard the Neil GehrelsSwiftObserva-tory between 2010 May and October. By fitting a single absorbed power-law modelto the XRT spectra, we infer power-law indices of Gamma = 1.8-2.7 and an absorptioncolumn density ofNH= (4.6-7.9)x10(22 )cm(-2). The inferred 0.5-10 keV luminos-ity fluctuated irregularly and peaked at L-X similar or equal to 10(35)-10(36)erg s(-1 )for a distance of4-12 kpc. Based on the evolution of the power-law index with varying luminosity,we propose that the source most likely is a transient neutron star low-mass X-raybinary located at several kpc. If true, it would be a good candidate to search forcoherent millisecond pulsations when it enters a new accretion outburst.

引用

页码：403 / 412

页数：10

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