Project Grant 2307232

Award Date 8/15/23
Completion Date 7/31/26
Dollars Obligated $475K
Federal Grant Program
47.049
Assistance Type
Project Grant
Place of Performance
Pasadena, CA 91125, USA
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The National Science Foundation (NSF) awarded a $475,345 Project Grant to the California Institute of Technology (Caltech) under the Mathematical and Physical Sciences program (CFDA 47.049) to conduct research on detecting dormant black holes and neutron stars in binary stellar systems. The key goals of the project are to:

  1. Obtain spectroscopic and multi-epoch radial velocity data for approximately 100 binary systems identified by the Gaia mission as likely containing black hole or neutron star components.

  2. Measure the mass distribution of black holes and neutron stars from 1 to 15 solar masses to determine if a "mass gap" exists.

  3. Constrain the frequency and magnitude of natal kicks imparted to black holes and neutron stars during formation by analyzing binary eccentricities and separations.

  4. Detect or rule out the presence of unseen tertiary companions in binary systems containing black holes.

The research will be primarily conducted by a PhD student, with the results expected to improve understanding of stellar evolution, supernovae, and black hole/neutron star formation. The award period is from August 15, 2023 to July 31, 2026.

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