High-mass X-ray Binaries and Ob- Runaway Stars
نویسنده
چکیده
High-mass X-ray binaries (HMXBs) represent an important phase in the evolution of massive binary systems. HMXBs provide unique diagnostics to test massive-star evolution, to probe the physics of radiationdriven winds, to study the process of mass accretion, and to measure fundamental parameters of compact objects. As a consequence of the supernova explosion that produced the neutron star (or black hole) in these systems, HMXBs have high space velocities and thus are runaways. Alternatively, OB-runaway stars can be ejected from a cluster through dynamical interactions. Observations obtained with the Hipparcos satellite indicate that both scenarios are at work. Only for a minority of the OB runaways (and HMXBs) a wind bow shock has been detected. This might be explained by the varying local conditions of the interstellar medium.
منابع مشابه
Forty Years of X-Ray Binaries
In 2012 it was forty years ago that the discovery of the first X-ray binary Centaurus X-3 became known. That same year it was discovered that apart from the High-Mass X-ray Binaries (HMXBs) there are also Low-Mass X-ray Binaries (LMXBs), and that Cygnus X-1 is most probably a black hole. By 1975 also the new class of Be/X-ray binaries was discovered. After this it took 28 years before ESAs INTE...
متن کاملOn the origin of the difference between the runaway velocities of the OB-supergiant X-ray Binaries and the Be/X-ray Binaries
The recent finding by Chevalier & Ilovaisky (1998) from Hipparcos observations that OB-supergiant X-ray binaries have relatively large runaway velocities (mean peculiar tangential velocity 〈vtr〉 = 42 ± 14 km s), whereas Be/X-ray binaries have low runaway velocities (〈vtr〉 = 15±6km s ), provides confirmation of the current models for the formation of these two types of systems. These predict a d...
متن کاملOn the Absence of Wind Bow-shocks around Ob-runaway Stars: Probing the Physical Conditions of the Interstellar Medium
High-resolution IRAS maps are used to search for the presence of stellar-wind bow-shocks around high-mass X-ray binaries (HMXBs). Their high space velocities, recently confirmed with Hipparcos observations, combined with their strong stellar winds should result in the formation of wind bow-shocks. Except for the already known bow-shock around Vela X-1 (Kaper et al. 1997), we do not find convinc...
متن کاملLetter to the Editor Constraints on mass ejection in black hole formation derived from black hole X-ray binaries
Both the recently observed high runaway velocities of Cyg X-1 (∼ 50 km s−1) and X-ray Nova Sco 1994 (≥ 100 km s−1) and the relatively low radial velocities of the black hole X-ray binaries with low mass donor stars, can be explained by symmetric mass ejection in the supernovae (SNe) which formed the black holes in these systems. Assuming symmetric mass ejection in black hole formation, we estim...
متن کاملConstraints on mass ejection in black hole formation derived from black hole X-ray binaries
Both the recently observed high runaway velocities of Cyg X-1 (∼ 50 km s) and X-ray Nova Sco 1994 (≥ 100 km s) and the relatively low radial velocities of the black hole X-ray binaries with low mass donor stars, can be explained by symmetric mass ejection in the supernovae (SNe) which formed the black holes in these systems. Assuming symmetric mass ejection in black hole formation, we estimate ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2001