Abstract
When a compact object is formed in a binary, any mass lost during core collapse will impart a kick on the binary’s center of mass. Asymmetries in this mass loss or neutrino emission would impart an additional natal kick on the remnant black hole or neutron star, whether it was formed in a binary or in isolation. While it is well established that neutron stars receive natal kicks upon formation, it is unclear whether black holes do as well. Here, we consider the low-mass X-ray binary MAXI J1305-704, which has been reported to have a space velocity ≳200 km s−1. In addition to integrating its trajectory to infer its velocity upon formation of its black hole, we account for recent estimates of its period, black hole mass, mass ratio, and donor effective temperature from photometric and spectroscopic observations. We find that if MAXI J1305-704 formed via isolated binary evolution in the thick Galactic disk, then the supernova that formed its black hole imparted a natal kick of at least 70 km s−1 while ejecting less than ≃1 M ⊙ with 95% confidence assuming uninformative priors on mass loss and natal kick velocity.
| Original language | English (US) |
|---|---|
| Article number | L34 |
| Journal | Astrophysical Journal Letters |
| Volume | 952 |
| Issue number | 2 |
| DOIs | |
| State | Published - Aug 1 2023 |
Funding
We thank Christopher Berry, Lieke van Son, and Michael Zevin for helpful discussions and comments on the manuscript. C.K. is supported by the Riedel Family Fellowship. V.K. is grateful for support from a Guggenheim Fellowship, from CIFAR as a Senior Fellow, and from Northwestern University, including the Daniel I. Linzer Distinguished University Professorship fund. K.R. and D.M. thank the LSSTC Data Science Fellowship Program, which is funded by the LSST Corporation, NSF Cybertraining grant No. 1829740, the Brinson Foundation, and the Gordon and Betty Moore Foundation; their participation in the program has benefited this work. Z.D. is grateful for support from the CIERA Board of Visitors Research Professorship. KK and EZ were partially supported by the Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS No. 2021.0277 and ESKAS No. 2019.0091, respectively). Z.X. was supported by the Chinese Scholarship Council (CSC). This work was performed with the help of the computing resources at CIERA provided by the Quest high performance computing facility at Northwestern University—funded through NSF PHY-1726951—which is jointly supported by the Office of the Provost, the Office for Research, and Northwestern University Information Technology.
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science