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Discovery of X-Rays from the Old and Faint Pulsar J1154\ndash6250статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 1 ноября 2018 г.
- Авторы: Igoshev A.P., Tsygankov S.S., Rigoselli M., Mereghetti S., Popov S.B., Elfritz J.G., Mushtukov A.A.
- Журнал: Astrophysical Journal
- Том: 865
- Год издания: 2018
- Издательство: University of Chicago Press
- Местоположение издательства: United States
- Первая страница: 116
- DOI: 10.3847/1538-4357/aadd93
- Аннотация: We report on the first X-ray observation of the 0.28 s isolated radio pulsar PSR J1154–6250 obtained with the XMM-Newton observatory in 2018 February. A point-like source is firmly detected at a position consistent with that of PSR J1154–6250. The two closest stars are outside the 3σ confidence limits of the source position and thus unlikely to be responsible for the observed X-ray emission. The energy spectrum of the source can be fitted equally well either with an absorbed power law with a steep photon index Γ ≈ 3.3 or with an absorbed blackbody with temperature kT = 0.21 ± 0.04 keV and emitting radius R BB ≈ 80 m (assuming a distance of 1.36 kpc). The X-ray luminosity of 4.4 × 1030 erg s‑1 derived with the power-law fit corresponds to an efficiency of {η }X={L}Xunabs}/\dot{E}=4.5× {10}-3, similar to those of other old pulsars. The X-ray properties of PSR J1154–6250 are consistent with an old age and suggest that the spatial coincidence of this pulsar with the OB association Cru OB1 is due to a chance alignment.
- Добавил в систему: Попов Сергей Борисович