Astrophysics - Solar and Stellar Astrophysics; Astrophysics - Earth and Planetary Astrophysics
Abstract :
[en] We report the discovery of a 61-Jupiter-mass brown dwarf (BD), which transits its F8V host star, WASP-30, every 4.16 days. From a range of age indicators we estimate the system age to be 1-2 Gyr. We derive a radius (0.89 ± 0.02 R Jup) for the companion that is consistent with that predicted (0.914 R Jup) by a model of a 1 Gyr old, non-irradiated BD with a dusty atmosphere. The location of WASP-30b in the minimum of the mass-radius relation is consistent with the quantitative prediction of Chabrier & Baraffe, thus confirming the theory.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Anderson, D. R.
Collier Cameron, A.
Hellier, C.
Lendl, M.
Maxted, P. F. L.
Pollacco, D.
Queloz, D.
Smalley, B.
Smith, A. M. S.
Todd, I.
Triaud, A H M J
West, R. G.
Barros, S. C. C.
Enoch, B.
Gillon, Michaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Alibert, Y., Mordasini, C., Benz, W., & Winisdoerffer, C. 2005, A&A, 434, 343
Bakos, G. Á., et al. 2010, ApJ, 710, 1724
Baraffe, I., Chabrier, G., Barman, T. S., Allard, F., & Hauschildt, P. H. 2003, A&A, 402, 701
Baranne, A., et al. 1996, A&AS, 119, 373
Barnes, S. A. 2007, ApJ, 669, 1167
Borucki, W. J., et al. 2010, Science, 327, 977
Bouchy, F., Deleuil, M., Guillot, T., Aigrain, S., Carone, L., & Cochran, W. D. 2010, A&A, 525, A68
Caballero, J. A., et al. 2007, A&A, 470, 903
Carlsson, M., Rutten, R. J., Bruls, J. H. M. J., & Shchukina, N. G. 1994, A&A, 288, 860
Chabrier, G., & Baraffe, I. 2000, ARA&A, 38, 337
Chabrier, G., Baraffe, I., Allard, F., & Hauschildt, P. 2000a, ApJ, 542, L119
Chabrier, G., Baraffe, I., Allard, F., & Hauschildt, P. 2000b, ApJ, 542, 464
Collier Cameron, A., et al. 2006, MNRAS, 373, 799
Collier Cameron, A., et al. 2007, MNRAS, 380, 1230
Deleuil, M., et al. 2008, A&A, 491, 889
Enoch, B., Collier Cameron, A., Parley, N. R., & Hebb, L. 2010, A&A, 516, A33
Ford, E. B. 2006, ApJ, 642, 505
Gillon, M., et al. 2009, A&A, 501, 785
Gray, D. F. 2008, in The Observation and Analysis of Stellar Photospheres, ed. D. F. Gray (Cambridge: Cambridge Univ. Press), 508
Hennebelle, P., & Chabrier, G. 2008, ApJ, 684, 395
Irwin, J., et al. 2010, ApJ, 718, 1353
Johnson, J. A., et al. 2010, ApJ, submitted (arXiv:1008.4141)
Leconte, J., Baraffe, I., Chabrier, G., Barman, T., & Levrard, B. 2009, A&A, 506, 385
Lucy, L. B., & Sweeney, M. A. 1971, AJ, 76, 544
Magain, P. 1984, A&A, 134, 189
Marigo, P., Girardi, L., Bressan, A., Groenewegen, M. A. T., Silva, L., & Granato, G. L. 2008, A&A, 482, 883
Mordasini, C., Alibert, Y., Benz, W., & Naef, D. 2008, in ASP Conf. Ser. 398, Extreme Solar Systems, ed. D. Fischer et al. (San Francisco, CA: ASP), 235
Padoan, P., & Nordlund, Å. 2004, ApJ, 617, 559
Pepe, F., et al. 2005, Messenger, 120, 22
Pollacco, D., et al. 2008, MNRAS, 385, 1576
Pollacco, D. L., et al. 2006, PASP, 118, 1407
Queloz, D., et al. 2000, A&A, 354, 99
Queloz, D., et al. 2001, A&A, 379, 279
Sahlmann, J., et al. 2010, A&A, 525, A95
Seager, S., & Mallén-Ornelas, G. 2003, ApJ, 585, 1038
Sestito, P., & Randich, S. 2005, A&A, 442, 615
Stassun, K. G., Mathieu, R. D., & Valenti, J. A. 2006, Nature, 440, 311
