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2023RNAAS...7...52H - Research Notes of the AAS, 7, 52 (2023/March-0)

First Ejection from the PSR B1259-63/LS 2883 High Mass Gamma-Ray Binary Detected During the 2021-2024 Binary Cycle.

HARE J., PAVLOV G.G., KARGALTSEV O. and GARMIRE G.P.

Abstract (from CDS):

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⊥ ≈ 0.07c and hard X-ray spectrum, which fits an absorbed power-law model with Γ = 1.1 ± 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.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): High mass x-ray binary stars - Neutron stars - Pulsars

Simbad objects: 1

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