The X-Ray Pulsar XTE J1858+034 Observed with NuSTAR and Fermi/GBM: Spectral and Timing Characterization plus a Cyclotron Line
Malacaria C, Kretschmar P, Madsen KK, Wilson-Hodge CA, Coley JB, Jenke P, Lutovinov AA, Pottschmidt K, Tsygankov SS, Wilms J (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 909
Journal Issue: 2
Abstract
Accreting X-ray pulsars (XRPs) undergo luminous X-ray outbursts during which the spectral and timing behavior of the neutron star can be studied in detail. We analyze a NuSTAR observation of the XRP XTE J1858+034 during its outburst in 2019. The spectrum is fit with a phenomenological, a semiempirical, and a physical spectral model. A candidate cyclotron line is found at 48 keV, implying a magnetic field of 5.4 x 10(12) G at the site of emission. This is also supported by the physical best-fit model. We propose an orbital period of about 81 days based on the visual inspection of the X-ray outburst recurrence time. Based on Fermi/GBM data, the standard disk accretion-torque theory allowed us to infer a distance of 10.9 1.0 kpc. Pulse profiles are single-peaked and show a pulsed fraction that is strongly energy-dependent at least up to 40 keV.
Authors with CRIS profile
Involved external institutions
National Aeronautics and Space Administration (NASA)
United States (USA) (US)
European Space Astronomy Centre (ESAC)
Spain (ES)
University of Alabama in Huntsville (UAH)
United States (USA) (US)
Russian Academy of Sciences / Росси́йская акаде́мия нау́к (RAS)
Russian Federation (RU)
United States (USA) (US)
European Space Astronomy Centre (ESAC)
Spain (ES)
University of Alabama in Huntsville (UAH)
United States (USA) (US)
Russian Academy of Sciences / Росси́йская акаде́мия нау́к (RAS)
Russian Federation (RU)
How to cite
APA:
Malacaria, C., Kretschmar, P., Madsen, K.K., Wilson-Hodge, C.A., Coley, J.B., Jenke, P.,... Wilms, J. (2021). The X-Ray Pulsar XTE J1858+034 Observed with NuSTAR and Fermi/GBM: Spectral and Timing Characterization plus a Cyclotron Line. Astrophysical Journal, 909(2). https://dx.doi.org/10.3847/1538-4357/abddbc
MLA:
Malacaria, C., et al. "The X-Ray Pulsar XTE J1858+034 Observed with NuSTAR and Fermi/GBM: Spectral and Timing Characterization plus a Cyclotron Line." Astrophysical Journal 909.2 (2021).
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