2024PASJ...76...98A

Query : 2024PASJ...76...98A

2024PASJ...76...98A - Publ. Astron. Soc. Jap., 76, 98-102 (2024/February-0)

X-ray iron absorption line in Swift J1858.6-0814.

ASAI K., MIHARA T., SAKAI K. and KUBOTA A.

Abstract (from CDS):

We present the spectral analysis of bright steady states in an outburst of the transient neutron star low-mass X-ray binary Swift J1858.6-0814 observed with the Neutron star Interior Composition Explorer (NICER). We detected an ionized iron K absorption line (H-like Fe) at 6.97 keV in the spectrum. We estimate the photoionization parameter using the ratio of the equivalent widths of the Fe XXVI (H-like) (17 ± 5 eV) and Fe XXV (He-like) (<3 eV) and discuss the origin of the iron absorption line. The irradiated gas producing the absorption line would locate within (3-6) × 109 cm of the X-ray source. We suggest that the observed H-like Fe absorption line originates from the highly ionized gas in the inner accretion disk in Swift J1858.6-0814.

Abstract Copyright: © The Author(s) 2024. Published by Oxford University Press on behalf of the Astronomical Society of Japan.

Journal keyword(s): accretion, accretion disks - stars: neutron - X-rays: binaries

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SWIFT J1858.6-0814 XB* 18 58 34.91 -08 14 14.8           ~ 76 0

Query : 2024PASJ...76...98A

Basic data :
SWIFT J1858.6-0814 -- X-ray Binary
Other object types: otypes_help 		X (2022MNRAS,SWIFT), XB* (2020MNRAS)
ICRS coord. (ep=J2000) : 		18 58 34.91 -08 14 14.8 (Ultraviolet) [ 610 610 0 ] D 2019GCN.23900....1B
FK4 coord. (ep=B1950 eq=1950) : 		18 55 51.72 -08 18 22.5 [ 610 610 0 ]
Gal coord. (ep=J2000) : 		026.38940 -05.32372 [ 610 610 0 ]
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Identifiers (1) :
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SWIFT J1858.6-0814

References (76 between 1850 and 2026) (Total 76)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : SWIFT J1858.6-0814

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