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Planets in Multiple-Star Systems: Properties and Detections

Published online by Cambridge University Press:  22 February 2018

S. Udry
Affiliation:
Geneva Observatory, 1290-Sauverny, Switzerland
A. Eggenberger
Affiliation:
Geneva Observatory, 1290-Sauverny, Switzerland
M. Mayor
Affiliation:
Geneva Observatory, 1290-Sauverny, Switzerland
T. Mazeh
Affiliation:
Tel Aviv University, Tel Aviv, Israel
S. Zucker
Affiliation:
Geneva Observatory, 1290-Sauverny, Switzerland Tel Aviv University, Tel Aviv, Israel

Abstract

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Orbital properties of extra-solar planets are briefly recalled and compared with equivalent features of stellar binaries. Similarities and differences are discussed. Among the more than 115 extra-solar planets discovered to date, 19 are orbiting a component of a binary system. We discuss the properties of this subsample and compare them with the equivalent characteristics of planets around single stars. Differences in the mass-period-eccentricity distributions are observed: exoplanets with m2 sin i > 2 MJup and P≤ 40-100 days are in binaries and present low eccentricities. In the context of the migration scenario, these characteristics are tentatively explained in the light of recent simulations of planet-disk interactions showing an increased accretion and migration rates of planets in case an additional perturbing close stellar companion is present in the system. Finally, different observational approaches to find planets in long-period spectroscopic binaries aiming to improve the still poor available statistics are presented. An important result is the detection of a planetary companion in the HD 41004 triple system.

Resumen

Resumen

Se presentan brevemente las propiedades orbitales de los planetas extrasolares, y se comparan con las de las estrellas binarias. Se discuten las similitudes y las diferencias entre ambas. Entre los más de 115 planetas extrasolares descubiertos hasta ahora, 19 orbitan en torno a una componente de un sistema binario. Discutimos las propiedades de esta sub-muestra, y las comparamos con las de los planetas que orbitan estrellas sencillas. Se observan diferencias en la distribución de masas-períodos-excentricidades; los exoplanetas con m2 sin i > 2 MJup y P ≤ 40-100 días están en binarias, y presentan excentricidades bajas. En el escenario de migración, estas características se explican tentativamente a la luz de simulaciones recientes de las interacciones planeta-disco, las cuales muestran tasas crecientes de acreción y migración en presencia de la perturbación de una compañera estelar cercana. También se presentan distintos enfoques observacionales que tienden a mejorar la estadística disponible, aún pobre. Un resultado importante es la detección de una compañera planetaria en el sistema triple HD 41004.

Type
Companions of Very Low Mass
Copyright
Copyright © Instituto de Astronomia – Mexico 2004

References

Artymowicz, P., & Lubow, S. 1994 ApJ, 421, 651 CrossRefGoogle Scholar
Boss, A.P. 1997 Science, 276, 1836 Google Scholar
Boss, A.P. 1998 BAAS, 30, 1057 Google Scholar
Duquennoy, A. & Mayor, M. 1991 A&A, 248, 485 Google Scholar
Eggenberger, A., Udry, S., & Mayor, M. 2003, in ASP Conf. Ser. 294, Scientific Frontiers in Research on Extrasolar Planets, eds. Deming, D. & Seager, S. (San Francisco: ASP), 43 Google Scholar
Eggenberger, A., Udry, S., & Mayor, M. 2004a A&A, in pressGoogle Scholar
Eggenberger, A., Udry, S., & Mayor, M. 2004b, in ASP Conf. Ser., Extrasolar Planets, Today and Tomorrow, eds. Beaulieu, J.-P., des Etangs, A. Lecavelier, & Terquem, C. (San Francisco: ASP), in pressGoogle Scholar
Halbwachs, J.-L., Mayor, M., Udry, S., & Arenou, F. 2003 A&A, 397, 159 Google Scholar
Holman, M. & Wiegert, P. 1999 AJ, 117, 621 CrossRefGoogle Scholar
Kley, W., 2001, in IAU Symp. 200, The Formation of Binary Stars, eds. Zinnecker, H. & Mathieu, R. (San Francisco: ASP), 511 Google Scholar
Marcy, G.W., Butler, R.P., Vogt, S.S., Liu, M.C., Laughlin, G., Apps, K., Graham, J.R., Lloyd, J., Luhman, K.L., & Jayawardhana, R. 2001 ApJ, 555, 418 CrossRefGoogle Scholar
Marcy., G.W., Butler, R.P., Fischer., D., & Vogt., S.S., in ASP Conf. Ser. 294, Scientific Frontiers inResearch on Extrasolar Planets, eds. Deming, D. & Seager, S. (San Francisco: ASP), 1 Google Scholar
Mayer, L., Quinn, T., Wadsley, J., & Stadel, J. 2002 Science, 298, 1756 Google Scholar
Mayor, M. & Udry, S. 2000, in ASP Conf. Ser. 219, Disks, Planetesimals and Planets, eds. Garzon, F., Eiroa, C., Winter, D.de & Mahoney, T.J. (San Francisco: ASP), 441 Google Scholar
Mazeh, T. & Zucker, S. 1994 Ap&SS, 212, 349 Google Scholar
Nelson, A. 2000 ApJ, 537, L65 Google Scholar
Pollack, J.B., Hubickyj, O., Bodenheimer, P., Lissauer., J.J., Podolak, M., & Greenzweig, Y. 1996 Icarus, 124, 62 Google Scholar
Rasio, F., Tout, C. Lubow, S., Livio, M. 1996 ApJ, 470, 1187 Google Scholar
Santos, N.C. et al. 2002 A&A, 392, 215 Google Scholar
Udry, S., Eggenberger, A., Beuzit, J.-L., Lagrange, A.M., Mayor, M., & Chauvin, G. 2004, this volumeGoogle Scholar
Udry, S., Eggenberger, A. & Mayor, M. 2004, in Planetary Systems and Planets in Systems, eds. Udry, S. Benz, W. & Vonsteiger, R., Space Science Series of ISSI (Dordrecht: Kluwer),in pressGoogle Scholar
Udry, S., Mayor, M., Latham, D.W., Stefanik, R.P. Torres, G., Mazeh, T., Goldberg, D., Andersen, J. & Nordstrom, B. 1998, in ASP Conf. Ser. 154, Cool: Stars, Stellar Systems and the Sun, eds. Donahue, R.A. & Bookbinder, A. (San Francisco: ASP), 2148 Google Scholar
Udry, S., Mayor, M., Naef, D., Pepe, F.,Queloz, D., Santos, N.C., & Burnet, M. 2002 A&A, 390, 267 Google Scholar
Udry, S., Mayor, M., & Queloz, D. 2003, in ASP Conf. Ser. 294, Scientific Frontiers in Research on Extrasolar Planets, eds. Deming, D. & Seager, S. (San Francisco: ASP), 17 Google Scholar
Udry, S., Mayor, M. & Santos, N.C. 2003 A&A, 407, 369 Google Scholar
Zucker, S., & Mazeh, T. 2002 ApJ, 568, L113 CrossRefGoogle Scholar
Zucker, S., Mazeh, T., Santos, N.C., Udry, S. & Mayor, M. 2003 A&A, 404, 775 Google Scholar
Zucker, S., Mazeh, T., Santos, N.C., Udry, S. & Mayor, M. 2004 A&A, in preparationGoogle Scholar