XMM-Newton Observations of the Black Widow Pulsar PSR B1957+20
| dc.creator | Huang, Hsiu-Hui | |
| dc.creator | Becker, Werner | |
| dc.date | 2007-01-22 | |
| dc.date | 2007-01-24 | |
| dc.date.accessioned | 2026-07-07T07:42:30Z | |
| dc.date.available | 2026-07-07T07:42:30Z | |
| dc.description | We report on XMM-Newton observations of the "Black Widow pulsar", PSR B1957+20. The pulsar's X-ray emission is non-thermal and best modeled with a single powerlaw spectrum of photon index 2.03(+0.51/-0.36). No coherent X-ray pulsations at the pulsar's spin-period could be detected, though a strong binary-phase dependence of the X-ray flux is observed for the first time. The data suggest that the majority of the pulsar's X-radiation is emitted from a small part of the binary orbit only. We identified this part as being near to where the radio eclipse takes place. This could mean that the X-rays from PSR B1957+20 are mostly due to intra-shock emission which is strongest when the pulsar wind interacts with the ablated material from the companion star. | |
| dc.description | 4 pages, 3 figures, accepted for publication in A&A Letters | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0701611 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0701611 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/122468 | |
| dc.subject | Astrophysics | |
| dc.title | XMM-Newton Observations of the Black Widow Pulsar PSR B1957+20 | |
| dc.type | text |