X-ray emission from the double neutron star binary B1534+12: Powered by the pulsar wind?
| dc.creator | Kargaltsev, O. | |
| dc.creator | Pavlov, G. G. | |
| dc.creator | Garmire, G. P. | |
| dc.date | 2006-03-31 | |
| dc.date.accessioned | 2026-07-07T10:43:44Z | |
| dc.date.available | 2026-07-07T10:43:44Z | |
| dc.description | We report the detection of the double neutron star binary (DNSB) B1534+12 (= J1537+1155) with the Chandra X-ray Observatory. This DNSB (orbital period 10.1 hr) consists of the millisecond (recycled) pulsar J1537+1155A (P_A=37.9 ms) and a neutron star not detected in the radio. After the remarkable double pulsar binary J0737-3039, it is the only other DNSB detected in X-rays. We measured the flux of (2.2\pm 0.6)\times10^{-15} ergs s^{-1} cm^{-2} in the 0.3-6 keV band. The small number of collected counts allows only crude estimates of spectral parameters. The power-law fit yields the photon index of 3.2\pm 0.5 and the unabsorbed 0.2-10 keV luminosity L_X=6\times10^{29} ergs s^{-1} = 3\times 10^{-4}Edot_A, where Edot_A is the spin-down power of J1537+1155A. Alternatively, the spectrum can be fitted by a blackbody model with T = 2.2 MK and the projected emitting area of ~ 5\times 10^3 m^2. The distribution of photon arrival times over binary orbital phase shows a deficit of X-ray emission around apastron, which suggests that the emission is caused by interaction of the relativistic wind from J1537+1155A with its neutron star companion. We also reanalyzed the Chandra and XMM-Newton observations of J0737-3039 and found that its X-ray spectrum is similar to the spectrum of B1534+12, and its X-ray luminosity is about the same fraction of Edot_A, which suggests similar X-ray emission mechanisms. However, the X-ray emission from J0737-3039 does not show orbital phase dependence. This difference can be explained by the smaller eccentricity of J0737-3039 or a smaller misalignment between the equatorial plane of the millisecond pulsar and the orbital plane of the binary. | |
| dc.description | 11 pages, 8 figures, accepted to ApJ | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0603853 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0603853 | |
| dc.identifier | Astrophys.J.646:1139-1148,2006 | |
| dc.identifier | doi:10.1086/504837 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/182346 | |
| dc.subject | Astrophysics | |
| dc.title | X-ray emission from the double neutron star binary B1534+12: Powered by the pulsar wind? | |
| dc.type | text |