A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Losing a minute every two years: SRG X-ray view of the rapidly accelerating X-ray pulsar SXP 1323
Tekijät: Mereminskiy IA, Mushtukov AA, Lutovinov AA, Tsygankov SS, Semena AN, Molkov SV, Shtykovsky AE
Kustantaja: EDP SCIENCES S A
Julkaisuvuosi: 2022
Lehti: Astronomy and Astrophysics
Tietokannassa oleva lehden nimi: ASTRONOMY & ASTROPHYSICS
Lehden akronyymi: ASTRON ASTROPHYS
Artikkelin numero: A33
Vuosikerta: 661
Sivujen määrä: 5
ISSN: 0004-6361
DOI: https://doi.org/10.1051/0004-6361/202141813
Julkaisun avoimuus kirjaamishetkellä: Avoimesti saatavilla
Julkaisukanavan avoimuus : Viivästetysti avoin julkaisukanava (julkaisut tulevat avoimesti saataville tietyn ajan jälkeen)
Verkko-osoite: https://doi.org/10.1051/0004-6361/202141813
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/176204650
Rinnakkaistallennetun julkaisun versio: Kustantajan versio
The source SXP 1323 is a peculiar high-mass X-ray binary located in the Small Magellanic Cloud. It is renowned for its rapid spin-up. We investigate for the first time broadband X-ray properties of SXP 1323 as observed by the Mikhail Pavlinsky ART-XC and eROSITA telescopes on board the Spectrum-Roentgen-Gamma observatory. Using ART-XC and eROSITA data, we produced a first broadband 1-20 keV X-ray spectrum and estimated the pulsed fraction box 8 keV. With the addition of archival XMM-Newton observations, we traced the evolution of the spin period of SXP 1323 over the last five years and found that after 2016, the source switched to a linear spin-up with a rate of -29.9 s yr-1. The broadband X-ray spectrum is typical for accreting X-ray pulsars. It has a steep power-law index (Γ = -0.15) and an exponential cutoff energy of 5.1 keV. No significant difference between spectra obtained in states with and without pulsations were found.
Avainsanat:
magnetic fields, neutron, X-RAYS
Ladattava julkaisu This is an electronic reprint of the original article. |  |
