X-Ray Pulsar XTE J1858+034: Discovery of the Cyclotron Line and the Revised Optical Identification

被引：11

作者：

Tsygankov, Sergey S. ^{[1
,2
]}

Lutovinov, Alexander A. ^{[2
]}

Molkov, Sergey V. ^{[2
]}

Djupvik, Anlaug A. ^{[3
,4
]}

Karasev, Dmitri I. ^{[2
]}

Doroshenko, Victor ^{[2
,5
]}

Mushtukov, Alexander A. ^{[2
,6
,7
]}

Malacaria, Christian ^{[8
,9
]}

Kretschmar, Peter ^{[10
]}

Poutanen, Juri ^{[1
,2
,11
,12
]}

机构：

[1] Univ Turku, Dept Phys & Astron, FI-20014 Turku, Finland

[2] Russian Acad Sci, Space Res Inst, Profsoyuznaya Str 84-32, Moscow 117997, Russia

[3] Nord Opt Telescope, Apartado 474, E-38700 Santa Cruz De La Palma, Santa Cruz De T, Spain

[4] Aarhus Univ, Dept Phys & Astron, NyMunkegade 120, DK-8000 Aarhus C, Denmark

[5] Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany

[6] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands

[7] Russian Acad Sci, Pulkovo Observ, St Petersburg 196140, Russia

[8] NASA, Marshall Space Flight Ctr, NSSTC, 320 Sparkman Dr, Huntsville, AL 35805 USA

[9] Univ Space Res Assoc, Sci & Technol Inst, 320 Sparkman Dr, Huntsville, AL 35805 USA

[10] European Space Agcy ESA, European Space Astron Ctr ESAC, Camino Bajo Castillo S-N, E-28692 Madrid, Spain

[11] KTH Royal Inst Technol, NORDITA, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden

[12] Stockholm Univ, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden

来源：

ASTROPHYSICAL JOURNAL | 2021年 / 909卷 / 02期

基金：

俄罗斯科学基金会;

关键词：

Accretion; Stellar accretion disks; Magnetic fields; Binary pulsars; Neutron stars; High mass x-ray binary stars; X-ray binary stars; INTRINSIC COLOR INDEXES; ABSOLUTE MAGNITUDES; HIPPARCOS PARALLAXES; STARS; LUMINOSITY; SCATTERING; OB; PHOTOMETRY; EMISSION; COMPTON;

D O I：

10.3847/1538-4357/abddbd

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of a detailed investigation of the poorly studied X-ray pulsar (XRP) XTE J1858+034 based on the data obtained with the NuSTAR observatory during the outburst of the source in 2019. The spectral analysis resulted in the discovery of a cyclotron absorption feature in the source spectrum at similar to 48 keV in both the pulse phase-averaged and resolved spectra. Accurate X-ray localization of the source using the NuSTAR and Chandra observatories allowed us to accurately determine the position of the X-ray source and identify the optical companion of the pulsar. The analysis of the counterpart properties suggested that the system is likely a symbiotic binary hosting an XRP and a late-type companion star of the K-M classes rather than a Be X-ray binary as previously suggested.

引用

页数：10

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