A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Cyclotron emission, absorption, and the two faces of X-ray pulsar A 0535+262
Tekijät: Tsygankov SS, Doroshenko V, Mushtukov AA, Suleimanov VF, Lutovinov AA, Poutanen J
Kustantaja: OXFORD UNIV PRESS
Julkaisuvuosi: 2019
Journal: Monthly Notices of the Royal Astronomical Society
Tietokannassa oleva lehden nimi: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Lehden akronyymi: MON NOT R ASTRON SOC
Vuosikerta: 487
Numero: 1
Aloitussivu: L30
Lopetussivu: L34
Sivujen määrä: 5
ISSN: 0035-8711
DOI: https://doi.org/10.1093/mnrasl/slz079
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/42543801
Deep NuSTAR observation of X-ray pulsar A 0535+262, performed at a very low luminosity of similar to 7 x 10(34) erg s(-1), revealed the presence of two spectral components. We argue that the high-energy component is associated with cyclotron emission from recombination of electrons collisionally excited to the upper Landau levels. The cyclotron line energy of E-cyc = 47.7 +/- 0.8 keV was measured at the luminosity of almost an order of magnitude lower than what was achieved before. The data firmly exclude a positive correlation of the cyclotron energy with the mass accretion rate in this source.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
