Abstract
Brown dwarfs are celestial objects that form in the same manner as stars, but which, due to their low mass, fail to generate sufficient energy during the initial collapse to achieve central temperatures that are capable of igniting hydrogen fusion. Lacking a long-lived energy source, brown dwarfs cool and fade to extremely low-luminosities on timescales that are short by astronomical standards. After a long drought, many examples have been discovered over the past 15 years, both as isolated objects in the field and as companions of known nearby stars. Most have extremely low surface temperatures, complex molecule-dominated atmospheres, and populate the new spectral classes L and T. This chapter summarizes our current knowledge of the basic characteristics of these low-mass objects and gives brief consideration to likely developments in the near future.
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Notes
- 1.
For a more extensive historical discussion of brown dwarf discoveries, see Reid and Hawley (2005), Chapter 6.
- 2.
It is probably fair to say that these colors came as a surprise to most observers, who were generally focused on searching for objects that were extremely red at all wavelengths. This should not have been a surprise, since Tsuji (1964) predicted exactly these characteristics almost three decades before the discovery of Gl 229B.
References
Allen, P. R., Koerner, D. W., Reid, I. N., & Trilling, D. E. 2005, ApJ, 625, 385
Artigau, E., Bouchard, S., Doyon, R., & Lafreniere, D. 2009, ApJL, 701, 1534
babcock, H. W. 1961, ApJ, 133, 572
Bailer-Jones, C. A. L. 2009, MNRAS, 348, 1145
Bastian, N., Covey, K. R., & Meyer, M. 2010, ARAA, 48, 339
Bate, M. R., Bonnell, I. A., & Bromm, V. 2002, MNRAS, 332, L65
Becklin, E.E., & Zuckerman, B. 1988, Nature, 336, 656
Berger, E. 2006, ApJ, 648, 629
Bonnell, I. A., Bate, M. R., Clarke, C. J., & Pringle, J. E. 1997, MNRAS, 285, 201
Bouvier, J., et al. 2008, A&A, 481, 661
Browning, M. K. 2008, ApJ, 676, 1262
Burgasser, A. J. 2007, ApJ, 659, 655
Burgasser, A. J., Kirkpatrick, J. D., Brown, M. E., Reid, I. N., Liebert, J., Matthews, K. Y., Burrows, A., Gizis, J. E., Dahn, C. C., Monet, D. G., Cutri, R. M., Skrutskie, M. F. 2001, ApJ, 564, 421
Burgasser, A. J., Kirkpatrick, J. D., Burrows, A. S., Liebert, J., Reid, I. N., Gizis, J. E., McGovern, M. R., Prato, L., & McLean, I. S. 2003, ApJ, 592, 1186
Burgasser, A. J., Burrows, A., & Kirkpatrick, J. D. 2006a, ApJ, 639, 1095
Burgasser, A. J., Kirkpatrick, J. D., Cruz, K. L., Reid, I. N., Leggett, S. K., Liebert, J., Burrows, A., & Brown, M. E., 2006b, ApJS, 166, 585
Burgasser, A. J., Reid, I. N., Siegler, N., Close, L. M., Allen, P., Lowrance, P. J., & Gizis, J. E. 2007, in Planets and Protostars V, eds. B. Reipurth, D. Jewitt, & K. Keil (Tucson: Univ. Arizona Press), 427
Burke, C. J., Pinsoneault, M. H. & Sills, A. 2004, ApJ, 604, 272
Burrows, A., & Liebert, J. 1993, Rev Mod Phys, 65, 301
Burrows, A., Hubbard, W. B., Saumon, D., & Lunine, J. I. 1993, ApJ, 406, 158
Burrows, A., Hubbard, W. B., Lunine, J. I., & Liebert, J. 2001, RvMP, 73, 719
Burrows, A., Marley, M., Hubbard, W. B., Lunine, J. I., Guillot, T., & Saumon, D. 1997, ApJ, 491, 856
Burrows, A., Sudarsky, D., & Lunine, J. I. 2003, ApJ, 596, 587
Chabrier, G., Baraffe, I., Allard, F., & Hauschildt, P. 2000, ApJL, 542, L119
Chabrier, G. 2003, PASP, 115, 763
Crézé, M., Chereul, E., Bienaymé, O., & Pichon, C. 1998, A&A, 329, 920
Cruz, K. L., Kirkpatrick, J. D., & Burgasser, A. J. 2009, AJ, 137, 3345
Cushing, M. C., Roellig, T. L., Marley, M. S., Saumon, D., Leggett, S. K., Kirkpatrick, J. D., Wilson, J. C., Sloan, G. C., Mainzer, A. K., Van Cleve, J. E., & Houck, J. R. 2006, ApJ 648, 614
Epchtein, N., et al. 1994, in Science with Astronomical Near-Infrared Surveys, Vol. 217 (Dordrecht/Boston: Kluwer), 3
Golimowski, D. A., Leggett, S. K., Marley, M., Fan, X., Geballe, T. R., knapp, G. R., Vrba, F. J., Henden, A. A., Luginbuhl, C. B., Guetter, H. H., Munn, J. A., Canzian, B., Zheng, W., Tsvetanov, Z. I., Chiu, K., Glazebrook, K., Hoversten, E. A., Schneider, D. P., & Brinkmann, J. 2004, AJ, 127, 3517
Gray, R. O., & Corbally, C. J. 2009, Stellar Spectral Classification, eds. O. G. Richard & J. C. Christopher (Princeton: Princeton University Press)
Grossman, A. S., Hays, D., & Graboske, H. C. 1974, A&A, 30, 95
Güdel, M., & Benz, A. O. 1993, ApJ, 405, L63
Hallinan, G., Antonova, A., Doyle, J. G., Bourke, S., Lane, C., & Golden, A. 2008, ApJ, 684, 644
Hawley, S. L. et al. 1995, ApJ, 453, 464
Hawley, S. L. & Fisher, G. H. 1992, ApJS, 78, 565
Kirkpatrick, J. D., Reid, I. N., Liebert, J., Cutri, R., Nelson, B., Beichman, C. A., Dahn, C. C., Monet, D. G., Skrutskie, M. F., & Gizis, J. E. 1999, ApJ, 519, 802
Kirkpatrick, J. D. 2005, ARAA, 43, 195
Kirkpatrick, J. D., et al. 2008, ApJ, 689, 1295
Kroupa, P. 2002, Science, 295, 82
Kumar, S. S. 1962, AJ, 67, 579
Kumar, S. S. 1963, ApJ, 137, 1121
Lada, C. J. & Lada, E. A. 2003, ARAA, 41, 57
Latham, D. W., Mazeh, T., Stefanik, R. P., Mayor, M., & Burki, G. 1989, Nature, 339, 38
Lawrence, A., et al. 2007, MNRAS, 379, 1599
Leggett, S. K., et al. 2010, ApJ, 710, 1627
Lépine, S., & Shara, M. M. 2005, AJ, 129, 1483
Liebert, J., Kirkpatrick, J. D., Reid, I. N. & Fisher, M. D. 1999, ApJ, 519, 345
Liebert, J., Kirkpatrick, J. D., Cruz, K. L., Reid, I. N., Burgasser, A. J., Tinney, C. G. & Gizis, J. E. 2003, AJ, 125, 343
Lodato, G., Delgado-Donate, E., & Clarke, C. J. 2005, MNRAS, 364, L91
Lodders, K., & Fegley, B. 2002, Icarus, 155, 393
Lucas, P. W. et al. 2010, MNRAS, 408, 56
Metchev, S. A., & Hillenbrand, L. A. 2009, ApJS, 181, 62
Metchev, S. A., Kirkpatrick, J. D., Berriman, G. B., & Looper, D. 2008, ApJ, 676, 1281
Miller, G. E., & Scalo, J. M. 1979, ApJS, 41, 513
Mohanty, S., Basri, G., Shu, F., Allard, F., & Chabrier, G. 2002, ApJ, 571, 469
Morales-Calderon, M., et al. 2006, ApJ, 635, 1454
Nakajima, T., Oppenheimer, B. R., Kulkarni, S. R., Golimowski, D. A., Matthews, K., & Durrance, S. T. 1995, Nature, 378, 463
Oort, J. H., 1932, BAN, 6, 249
Parker, E. N. 1955, ApJ, 122, 293
Pascucci, I., Apai, D., Luhman, L., Henning, T., Bouwman, J., Meyer, M. R., Lahius, F., & Natta, A. 2009, ApJ, 696, 143
Payne, M. J., & Lodato, G. 2007, MNRAS, 381, 1597
Preibisch, T., & Feigelson, E. D. 2005, ApJS, 160, 390
Rebolo, R., Martin, E. L., & Magazzu, A. 1992, ApJL, 389, L83
Reid, I. N., & Gizis, J. E. 1997, AJ, 113, 2246
Reid, I. N., Gizis, J. E., & Hawley, S. L. 2002, AJ, 123, 3356
Reid, I. N., Hawley, S. L., & Mateo, M. 1995, MNRAS, 272, 828
Reid, I. N., & Hawley, S. L. 2005, New Light on Dark Stars, (2nd ed.; New York: Praxis/Springer)
Reid, I. N., Cruz, K. C., Burgasser, A. J., & Liu, M. 2008a, AJ, 135, 580
Reid, I. N., Cruz, K. C., Kirkpatrick, J. D., Allen, P. R., Mungall, F., Liebert, J., Lowrance, P., & Sweet, A. 2008b, AJ, 136, 1290
Reid, I. N., Kirkpatrick, J. D., Liebert, J., Burrows, A., Gizis, J. E., Burgasser, A. J., Dahn, C. C., Monet, D., Cutri, R. M., Beichman, C. A., & Skrutskie, M. F. 1999, ApJ, 521, 613
Reiners, A., & Basri, G. 2007, ApJ, 656, 1121
Rosner, R. 1980, in Cool Stars, Stellar Systems and the Sun, SAO Special Report, 389, 79
Salpeter, E. E. 1956, ApJ, 121, 161
Saumon, D., & Marley, M. S. 2008, ApJ, 689, 1327
Schmidt, S. J., West, A. A., Hawley, S. L., & Pineda, J. S. 2010, AJ, 139, 1808
Skrutskie, M. F., et al. 2006, AJ, 131, 1163
Smith, R. C. 1983, Observatory, 103, 29
Stauffer, J. R., et al. 2007, ApJs, 172, 663
Stelzer, B., Micela, G., Flaccomio, E., Neuhauser, R., & Jayawardhana, R. 2006, A&A, 448, 293
Tarter, J. C. 1974, Ph.D. thesis, Univ. of California, Berkeley
Treumann, R. 2006, A&A Rev., 13, 229
Tsuji, T. 1964, Ann. Tokyo Obs. Ser. II 9, 1
Tsuji, T., Ohnaka, K., Aoki, W., & Nakajima, T. 1996, A&A, 308, L29
van Biesbroeck, G. 1944, AJ, 51, 61
West, A. A., Hawley, S. L., Bochanski, J. J., Covey, K. R., Reid, I. N., Dhital, S., Hilton, E. J., & Masuda, M. 2008, AJ, 135, 785
Wielen, R. 1977, A&A, 60, 263
Wright, E. L. et al. 2010, AJ, 140, 1868
York, D. G., et al. 2000, AJ, 120, 1579
Zuckerman, B., & Zong, I. 2004, ARAA, 42, 685
Acknowledgments
Thanks to Rachel Osten, Sarah Schmidt, Daniel Apai and, particularly Suzanne Hawley for reading and commenting on an earlier draft of this manuscript.
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Reid, I.N. (2013). Brown Dwarfs. In: Oswalt, T.D., Barstow, M.A. (eds) Planets, Stars and Stellar Systems. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-5615-1_7
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