HEASA 2021

Session

XRB I

14 Sept 2021, 16:00

Conveners

XRB I

• David Buckley

105. A decade of black hole X-ray binary transients

Phil Charles (University of Southampton)

14/09/2021, 16:00

X-ray and γ-ray binaries

Invited talk

The last decade has seen a significant gain in both space and ground-based monitoring capabilities, producing vastly better coverage of BH X-ray binaries during their (rare) transient outbursts. This interval also included two of the 3 brightest X-ray outbursts ever observed, namely V404 Cyg in 2015, and MAXI J1820+070 in 2018, as well as Swift J1357.2-0933, the first such system to show a...

106. Be X-ray binary 4U 1901+03: Cyclotron resonance scattering feature and its imprint on the pulse profile

aru beri (IISER Mohali, India)

14/09/2021, 16:30

X-ray and γ-ray binaries

Contributed talk

X-ray binaries are among the brightest objects of our Galaxy in the high-energy domain (0.1-100 keV). Despite a relatively good knowledge of their basic emission mechanisms, we still lack a complete understanding of their time, energy, and luminosity dependence. We will present results obtained from a detailed study of a transient Be X-ray pulsar 4U 1901+03. This source was followed by NuSTAR...

107. Determining the orbital parameters of the gamma-ray binary HESS J0632+057

Natalie Matchett (University of the Free State)

14/09/2021, 16:45

X-ray and γ-ray binaries

Contributed talk

Gamma-ray binaries are a rare subclass of high mass binary systems that display non-thermal emission peaking at energies greater than 1 MeV. All the identified systems contain an O/Oe or B/Be type star and a compact object in the mass range of a neutron star or black hole. Correctly interpreting how these sources can produce non-thermal emission, up to very high energy gamma-rays, depends on...

109. Gamma-gamma absorption in gamma-ray binaries

Brian van Soelen (University of the Free State)

14/09/2021, 17:00

X-ray and γ-ray binaries

Contributed talk

Gamma-ray binaries are a rare subclass of high mass binary systems, where the non-thermal emission peaks in the gamma-ray regime. Two scenarios have been proposed to explain the production of the emission; in the pulsar wind scenario the compact object is proposed to be a rapidly rotating pulsar, and the emission originates from particle acceleration that occurs at the shock that forms between...

110. On the long-term optical and X-ray behaviour of sibling SMC Be X-ray binaries SXP15.3 and SXP305

Itumeleng Monageng (University of Cape Town)

14/09/2021, 17:15

X-ray and γ-ray binaries

Contributed talk

Be X-ray binaries, which make up the largest subclass of the high mass X-ray binary systems, comprise a neutron star in an eccentric orbit around Be star companion with a geometrically thin Keplerian disc. The interaction of the neutron star with the Be disc results in the accretion of matter leading to X-ray outbursts. The X-ray outbursts occur in two flavours: type I (or normal, with...