Magnetic Field Geometry of the Gamma-Ray Binary PSR B1259-63 Revealed via X-Ray Polarization

被引：0

作者：

Kaaret, Philip ^{[1
]}

Roberts, Oliver J. ^{[2
]}

Ehlert, Steven R. ^{[1
]}

Swartz, Douglas A. ^{[2
]}

Weisskopf, Martin C. ^{[1
]}

Liodakis, Ioannis ^{[1
,3
]}

Saade, M. Lynne ^{[2
]}

O'Dell, Stephen L. ^{[1
]}

Chen, Chien-Ting ^{[2
]}

机构：

[1] NASA Marshall Space Flight Ctr, Huntsville, AL 35812 USA

[2] Univ Space Res Assoc, Sci & Technol Inst, Huntsville, AL 35805 USA

[3] Fdn Res & Technol Hellas, Inst Astrophys, GR-70013 Iraklion, Greece

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2024年 / 974卷 / 01期

基金：

美国国家航空航天局;

关键词：

HIGH-ENERGY EMISSION; SYSTEM; RADIO; PERIASTRON; ASTROPY; PACKAGE; PROJECT;

D O I：

10.3847/2041-8213/ad7ba6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Some X-ray binaries containing an energetic pulsar in orbit around a normal star accelerate particles to high energies in the shock cone formed where the pulsar and stellar winds collide. The magnetic field geometry in the acceleration region in such binaries is unknown. We performed the first measurement of the polarization of the X-ray synchrotron emission from a gamma-ray-emitting binary system. We observed PSR B1259-63 with the Imaging X-ray Polarimetry Explorer during an X-ray bright phase following the periastron passage in 2024 June. X-ray polarization is detected with a polarization degree of 8.3% +/- 1.5% at a significance of 5.3 sigma. The X-ray polarization angle is aligned with the axis of the shock cone at the time of the observation. This indicates that the predominant component of the magnetic field in the acceleration region is oriented perpendicular to the shock-cone axis.

引用

页数：4

共 24 条

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