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.
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页数：10
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