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On formation of close binaries by two-body tidal capture

Press, William H. and Teukolsky, Saul A. (1977) On formation of close binaries by two-body tidal capture. Astrophysical Journal, 213 . pp. 183-192. ISSN 0004-637X. doi:10.1086/155143.

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We calculate in detail the two-body tidal capture mechanism of Fabian, Pringle, and Rees: when two unbound stars have a close encounter, they may become bound by the energy that each deposits into nonradial oscillations of the other. After dimensional scalings are removed, the process depends only on a single dimensionless parameter, and on the dimensionless envelope structure of the stars. General formulae are derived; for definiteness, we apply them to the specific case of stars with an n = 3 polytropic structure. Capture cross sections as a function of velocity and capture rates for an isothermal distribution are given for the case of equal-mass stars; other cases can easily be computed from the formulae given.

Item Type:Article
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URLURL TypeDescription
Teukolsky, Saul A.0000-0001-9765-4526
Additional Information:© 1977 The American Astronomical Society. Provided by the NASA Astrophysics Data System. Supported in part by the National Science Foundation [PHY 76-14852] at Harvard University, and [PHY 76-07297] at Cornell University; also by grant [GP-30799X] at Princeton University. Alfred P. Sloan Foundation Research Fellow.
Funding AgencyGrant Number
NSFPHY 76-14852
NSFPHY 76-07297
Alfred P. Sloan FoundationUNSPECIFIED
Subject Keywords:stars: binaries — stars: stellar dynamics
Record Number:CaltechAUTHORS:20190506-153505082
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95268
Deposited By: Tony Diaz
Deposited On:06 May 2019 22:49
Last Modified:16 Nov 2021 17:11

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