Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-26T10:53:40.507Z Has data issue: false hasContentIssue false

Compact Binaries in Globular Clusters

Published online by Cambridge University Press:  22 February 2018

Natalia Ivanova
Affiliation:
Northwestern University, USA
Frederic A. Rasio
Affiliation:
Northwestern University, USA

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In dense stellar systems the frequent dynamical interactions between stars play a crucial role in the formation and evolution of compact binaries. We study these processes using a novel approach combining a state-of-the- art binary population synthesis code with a simple treatment of dynamical interactions in dense star cluster cores. Here we focus on the dynamical and evolutionary processes leading to the formation of compact binaries containing white dwarfs in dense globular clusters. We demonstrate that dynamics can increase by factors ~ 2 – 100 the production rates of interesting binaries such as cataclysmic variables, “nonflickerers” (He white dwarfs with a heavier dark companion), merging white dwarf binaries with total masses above the Chandrasekhar limit, and white dwarf binaries emitting gravitational waves in the LISA band.

Resumen

Resumen

En sistemas estelares densos, las frecuentes interacciones dinámicas entre estrellas juegan un papol importante en la formación y evolución de las binarias compactas. Estudiamos esos procesos utilizando una nueva aproximación que combina los códigos de síntesis de población de binarias con un tratamiento simple de interacciones dinámicas en centros de cúmulos estelares densos. Nos enfocamos en los proeesos dinámicos y evolutivos que llevan a la formación de binarias compactas que contienen enanas blancas en cúmulos globulares densos. Demostramos que la dinámica puede incrementar en un factor de ~ 2 – 100 los ritmos de producción de binarias, tales como variables cataclísmicas, “nonflickerers” (enanas blancas cou una compañera oscura más pesada), objetos resultantes de la fusión de enanas blancas binarias con masas totales por encima del límite de Chandrasekhar, y enanas blancas binarias que emiten ondas gravitacionales en la banda de LISA.

Type
The Contributed Papers
Copyright
Copyright © Instituto de astronomia/revista mexicana de astronomίa y astrofίsica 2004

References

Belczyński, K., Kalogera, V., & Bulik, T. 2002, ApJ, 57, 407 CrossRefGoogle Scholar
Benacquista, M.J., Portegies Zwart, S., and Rasio, F. 2001, Class. Quantum Grav., 18, 4025 Google Scholar
Chen, K., & Leonard, P.J.T. 1993, ApJ, 411, L75 CrossRefGoogle Scholar
Clark, G.W. 1975, ApJ, 199, L143 Google Scholar
Cool, A.M., Grindlay, J.E., Cohn, H.N., Lugger, P.M., Bailyn, C.D. 1998, ApJ, 508, L75 Google Scholar
Fregeau, J.M., Gürkan, M.A., Joshi, K.J., & Rasio, F. 2003, ApJ, 593, 772 Google Scholar
Fregeau, J.M., & Rappaport, S.A. 2004, in preparatioGoogle Scholar
Fregeau, J.M., Cheung, P., Portegies Zwart, S.F., Rasio, F.A. 2004, submitted to MNRAS [astro-ph/0401004]Google Scholar
Hansen, B.M.S., Kalogera, V., & Rasio, F.A. 2003, ApJ 586, 1364 CrossRefGoogle Scholar
Heggie, D.C. 1975, MNRAS, 173, 729 Google Scholar
Hut, P., McMillan, S., & Romani, R.W. 1992, ApJ, 38, 527 Google Scholar
Ivanova, N., Belczyński, K., Fregeau, J.M.,& Rasio, F.. 2004, submitted to ApJ[astro-ph/0312497]Google Scholar
Leibundgut, B. 2001, ARA&A, 39, 67 Google Scholar
Pfahl, E., Rappaport, S., & Podsiadlowski, P. 2002, ApJ 573, 283 Google Scholar
Portegies Zwart, S.F., Hut, P., McMillan, S.L.W., & Verbunt, F 1997, A&A, 328, 143 Google Scholar
Portegies Zwart, S.F., McMillan, S.L.W., Hut, P., Makino, J. 2001, MNRAS, 321, 199 Google Scholar
Rasio, F.A., Pfahl, E.D., & Rappaport, S. 2000, ApJ, 532, L47 Google Scholar
Shara, M.M. & Hurley, J.R. 2002, ApJ, 571, 830 Google Scholar
Wilkinson, M.I., Hurley, J.R., Mackey, A.D., Gilmoi, G. F., & Tout, C.A. 2003, MNRAS, 343, 1025 CrossRefGoogle Scholar