On the natal kick of the black hole X-ray binary H 1705-250
Abstract
When a compact object is formed, an impulse (kick) will be imparted to the system by the mass lost during the core-collapse supernova (SN). A number of other mechanisms may impart an additional kick on the system, although evidence for these natal kicks in black hole systems remains limited. Updated Gaia astrometry has recently identified a number of high peculiar velocity (in excess of Galactic motion) compact objects. Here, we focus on the black hole low-mass X-ray binary H 1705-250, which has a peculiar velocity $\upsilon _{\mathrm{pec}}\, =\, 221^{+101}_{-108}\, \,\mathrm{km}\, \mathrm{s}^{-1}$. Using population synthesis to reconstruct its evolutionary history (assuming formation via isolated binary evolution within the Galactic plane), we constrain the properties of the progenitor and pre-SN orbit. The magnitude of a kick solely due to mass-loss is found to be ~30 km s-1, which cannot account for the high present-day peculiar motion. We therefore deduce that the black hole received an additional natal kick at formation, and place limits on its magnitude, finding it to be ~295 km s-1 (minimum 90 km s-1). This furthers the argument that these kicks are not limited to neutron stars.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- January 2024
- DOI:
- 10.1093/mnrasl/slad151
- arXiv:
- arXiv:2310.11492
- Bibcode:
- 2024MNRAS.527L..82D
- Keywords:
-
- black hole physics;
- stars: kinematics and dynamics;
- supernovae: general;
- X-rays: binaries;
- Astrophysics - High Energy Astrophysical Phenomena;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- MNRAS in press