First ejection from the PSR B1259-63/LS 2883 high mass gamma-ray binary detected during the 2021-2024 binary cycle

Abstract

LS 2883/PSR B1259-63 is a high mass, eccentric gamma-ray binary that has previously been observed to eject X-ray emitting material. We report the results of recent Chandra observations near binary apastron in which a new X-ray emitting clump of matter was detected. The clump has a high projected velocity of $v_{\perp }\approx 0.07c$ and hard X-ray spectrum, which fits an absorbed power-law model with $\Gamma =1.1\pm 0.3$. Although clumps with similar velocities and spectra were detected in some of the previous binary cycles, no resolved clumps were seen near apastron in the preceding cycle of 2017-2021.

arXiv commentRNAAS

References in corpus (9)

• Gamma-ray binaries and related systems
• Astrophysical parameters of LS2883 and implications for the PSR B1259-63 gamma-ray binary
• The geometric distance and binary orbit of PSR B1259-63
• Extended Emission from the PSR B1259-63/SS 2883 Binary Detected with Chandra
• Origin of the transient unpulsed radio emission from the PSR B1259-63 binary system
• The origin of the X-ray-emitting object moving away from PSR B1259-63
• The dynamic X-ray nebula powered by the pulsar B1259-63
• Evolution of the extended X-ray emission from the PSR B1259-63/LS 2883 binary in the 2014-2017 binary cycle
• High-speed Ejecta from the Gamma-ray Binary PSR B1259-63/LS 2883