Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1)
X-Ray Pulsar XTE J1858+034: Discovery of the Cyclotron Line and the Revised Optical Identification
Julkaisun tekijät: Tsygankov Sergey S., Lutovinov Alexander A., Molkov Sergey V., Djupvik Anlaug A., Karasev Dmitri I., Doroshenko Victor, Mushtukov Alexander A., Malacaria Christian, Kretschmar Peter, Poutanen Juri
Kustantaja: IOP PUBLISHING LTD
Julkaisuvuosi: 2021
Journal: Astrophysical Journal
Tietokannassa oleva lehden nimi: ASTROPHYSICAL JOURNAL
Lehden akronyymi: ASTROPHYS J
Artikkelin numero: ARTN 154
Volyymi: 909
Julkaisunumero: 2
Sivujen määrä: 10
ISSN: 0004-637X
eISSN: 1538-4357
DOI: http://dx.doi.org/10.3847/1538-4357/abddbd
Verkko-osoite: https://iopscience.iop.org/article/10.3847/1538-4357/abddbd
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/53689812
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.
Ladattava julkaisu This is an electronic reprint of the original article. |