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A stellar audit: the computation of encounter rates for 47 Tucanae and ω Centauri

Davies, Melvyn B. and Benz, Willy (1995) A stellar audit: the computation of encounter rates for 47 Tucanae and ω Centauri. Monthly Notices of the Royal Astronomical Society, 276 (3). pp. 876-886. ISSN 0035-8711. http://resolver.caltech.edu/CaltechAUTHORS:20170409-083715048

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Abstract

Using King-Mitchie Models, we compute encounter rates between the various stellar species in the globular clusters ω Cen, and 47 Tuc. We also compute event rates for encounters between single stars and a population of primordial binaries. Using these rates, and what we have learnt from hydrodynamical simulations of encounters performed earlier, we compute the production rates of objects such as low-mass X-ray binaries (LMXBs), smothered neutron stars and blue stragglers (massive main-sequence stars). If 10 per cent of the stars are contained in primordial binaries, the production rate of interesting objects from encounters involving these binaries is as large as that from encounters between single stars. For example, encounters involving binaries produce a significant number of blue stragglers in both globular cluster models. The number of smothered neutron stars may exceed the number of LMXBs by a factor of 5–20, which may help explain why millisecond pulsars are observed to outnumber LMXBs in globular clusters.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1093/mnras/276.3.876DOIArticle
https://arxiv.org/abs/astro-ph/9507025arXivDiscussion Paper
Alternate Title:A Stellar Audit: The Computation of Encounter Rates for 47 Tucanae and omega Centauri
Additional Information:© 1995 Royal Astronomical Society. Provided by the NASA Astrophysics Data System. Accepted 1995 April 26. Received 1995 March 27; in original form 1994 December 21. We thank Sverre Aarseth and Steinn Sigurdsson for useful discussions, and the referee for comments. MBD gratefully acknowledges support from an R. C. Tolman Research Fellowship from Caltech. The work of WB was supported in part by NSF Grant AST-0206378.
Group:TAPIR
Funders:
Funding AgencyGrant Number
Richard Chace Tolman FellowshipUNSPECIFIED
NSFAST-0206378
Subject Keywords:binaries: general, stars: evolution, globular clusters: general, globular clusters: individual: 47 Tuc, globular clusters: individual: ω Cen
Record Number:CaltechAUTHORS:20170409-083715048
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170409-083715048
Official Citation:Melvyn B. Davies, Willy Benz; A stellar audit: the computation of encounter rates for 47 Tucanae and ω Centauri, Monthly Notices of the Royal Astronomical Society, Volume 276, Issue 3, 1 October 1995, Pages 876–886, https://doi.org/10.1093/mnras/276.3.876
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76459
Collection:CaltechAUTHORS
Deposited By: 1Science Import
Deposited On:04 Apr 2018 18:15
Last Modified:04 Apr 2018 18:15

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