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Brown dwarfs as Galactic chronometers

Published online by Cambridge University Press:  01 October 2008

Adam J. Burgasser
Adam J. Burgasser*
Affiliation:
Massachusetts Institute of Technology, Kavli Institute for Astrophysics and Space Research, Building 37, Room 664B, 77 Massachusetts Avenue, Cambridge, MA 02139, USA email: [email protected]
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Abstract

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Brown dwarfs are natural clocks, cooling and dimming over time due to insufficient core fusion. They are also numerous and present in nearly all Galactic environments, making them potentially useful chronometers for a variety of Galactic studies. For this potential to be realized, however, precise and accurate ages for individual sources are required, a prospect made difficult by the complex atmospheres and spectra of low-temperature brown dwarfs; degeneracy between mass, age and luminosity; and the lack of useful age trends in magnetic activity and rotation. In this contribution, I review five ways in which ages for brown dwarfs are uniquely determined, discuss their applicability and limitations, and give current empirical precisions.

Keywords

stars: binariesstars: fundamental parametersstars: kinematicsstars: late-typestars: low-massbrown dwarfs
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S258: The Ages of Stars , October 2008 , pp. 317 - 326
Copyright
Copyright © International Astronomical Union 2009

References

Allers, K. N., Jaffe, D. T., Luhman, K. L., et al. 2007, ApJ, 657, 511CrossRefGoogle Scholar
Bannister, N. P. & Jameson, R. F. 2007, MNRAS, 378, L24CrossRefGoogle Scholar
Baraffe, I., Chabrier, G., Allard, F., & Hauschildt, P. H. 2002, A&A, 382, 563Google Scholar
Barrado y Navascués, D., Stauffer, J. R., & Patten, B. M. 1999, ApJL, 522, L53CrossRefGoogle Scholar
Basri, G. & Reiners, A. 2006, AJ, 132, 663CrossRefGoogle Scholar
Berger, E. 2006, ApJ, 648, 629CrossRefGoogle Scholar
Bildsten, L., Brown, E. F., Matzner, C. D., & Ushomirsky, G. 1997, ApJ, 482, 442CrossRefGoogle Scholar
Blake, C. H., Charbonneau, D., White, R. J., Marley, M. S., & Saumon, D. 2007, ApJ, 666, 1198CrossRefGoogle Scholar
Blake, C. H., Charbonneau, D., White, R. J., Torres, G., Marley, M. S., & Saumon, D. 2008, ApJL, 678, L125CrossRefGoogle Scholar
Borysow, A., Jorgensen, U. G., & Zheng, C. 1997, A&A, 324, 185Google Scholar
Bouvier, J., Stauffer, J. R., Martin, E. L., Barrado y Navascues, D., Wallace, B., & Bejar, V. J. S. 1998, A&A, 336, 490Google Scholar
Bouy, H., Duchêne, G., Köhler, R. et al. , 2004, A&A, 423, 341Google Scholar
Burgasser, A. J. 2004, ApJS, 155, 191CrossRefGoogle Scholar
Burgasser, A. J. 2007, ApJ, 658, 617CrossRefGoogle Scholar
Burgasser, A. J., Burrows, A., & Kirkpatrick, J. D. 2006a, ApJ, 639, 1095CrossRefGoogle Scholar
Burgasser, A. J., Kirkpatrick, J. D., Brown, M. E. et al. , 2002, ApJ, 564, 421CrossRefGoogle Scholar
Burgasser, A. J., Kirkpatrick, J. D., Burrows, A., Liebert, J., Reid, I. N., Gizis, J. E., McGovern, M. R., Prato, L., & McLean, I. S. 2003, ApJ, 592, 1186CrossRefGoogle Scholar
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, 585CrossRefGoogle Scholar
Burke, C. J., Pinsonneault, M. H., & Sills, A. 2004, ApJ, 604, 272CrossRefGoogle Scholar
Burningham, B., Pinfield, D. J., Leggett, S. K. et al. , 2008, MNRAS, 1183Google Scholar
Casewell, S. L., Jameson, R. F., & Burleigh, M. R. 2008, MNRAS, 390, 1517Google Scholar
Cruz, K. L., Reid, I. N., Kirkpatrick, J. D., Burgasser, A. J., Liebert, J., Solomon, A. R., Schmidt, S. J., Allen, P. R., Hawley, S. L., & Covey, K. R. 2007, AJ, 133, 439CrossRefGoogle Scholar
Cushing, M. C., Marley, M. S., Saumon, D., Kelly, B. C., Vacca, W. D., Rayner, J. T., Freedman, R. S., Lodders, K., & Roellig, T. L. 2008, ApJ, 678, 1372CrossRefGoogle Scholar
Day-Jones, A. C., Pinfield, D. J., Napiwotzki, R., Burningham, B., Jenkins, J. S., Jones, H. R. A., Folkes, S. L., Weights, D. J., & Clarke, J. R. A. 2008, MNRAS, 388, 838CrossRefGoogle Scholar
Dupuy, T. J., Liu, M. C., & Ireland, M. J. 2008, ArXiv e-printsGoogle Scholar
Faherty, J. K., Burgasser, A. J., Cruz, K. L., Shara, M. M., Walter, F. M., & Gelino, C. R. 2008, ArXiv e-printsGoogle Scholar
Farihi, J., Becklin, E. E., & Zuckerman, B. 2008, ApJ, 681, 1470CrossRefGoogle Scholar
Geballe, T. R., Saumon, D., Leggett, S. K., Knapp, G. R., Marley, M. S., & Lodders, K. 2001, ApJ, 556, 373CrossRefGoogle Scholar
Gorlova, N. I., Meyer, M. R., Rieke, G. H., & Liebert, J. 2003, ApJ, 593, 1074CrossRefGoogle Scholar
Hänninen, J. & Flynn, C. 2002, MNRAS, 337, 731CrossRefGoogle Scholar
Hayashi, C. & Nakano, T. 1963, Progress of Theoretical Physics, 30, 460CrossRefGoogle Scholar
Jameson, R. F., Lodieu, N., Casewell, S. L., Bannister, N. P., & Dobbie, P. D. 2008, MNRAS, 385, 1771CrossRefGoogle Scholar
Jeffries, R. D. & Oliveira, J. M. 2005, MNRAS, 358, 13CrossRefGoogle Scholar
Joergens, V. & Müller, A. 2007, ApJL, 666, L113CrossRefGoogle Scholar
Kirkpatrick, J. D. 2005, ARAA, 43, 195CrossRefGoogle Scholar
Kirkpatrick, J. D., Barman, T. S., Burgasser, A. J., McGovern, M. R., McLean, I. S., Tinney, C. G., & Lowrance, P. J. 2006, ApJ, 639, 1120CrossRefGoogle Scholar
Kirkpatrick, J. D., Cruz, K. L., Barman, T. S. et al. , 2008, ArXiv e-prints, 808Google Scholar
Knapp, G. R., Leggett, S. K., Fan, X. et al. , 2004, AJ, 127, 3553CrossRefGoogle Scholar
Kumar, S. S. 1963, ApJ, 137, 1121CrossRefGoogle Scholar
Lane, B. F., Zapatero Osorio, M. R., Britton, M. C., Martín, E. L., & Kulkarni, S. R. 2001, ApJ, 560, 390CrossRefGoogle Scholar
Leggett, S. K., Allard, F., Dahn, C., Hauschildt, P. H., Kerr, T. H., & Rayner, J. 2000, ApJ, 535, 965CrossRefGoogle Scholar
Linsky, J. L. 1969, ApJ, 156, 989CrossRefGoogle Scholar
Liu, M. C., Dupuy, T. J., & Ireland, M. J. 2008, ArXiv e-printsGoogle Scholar
Liu, M. C. & Leggett, S. K. 2005, ApJ, 634, 616CrossRefGoogle Scholar
Lodders, K. 1999, ApJ, 519, 793CrossRefGoogle Scholar
Looper, D. L., Kirkpatrick, J. D., Cutri, R. M. et al. , 2008, ApJ, 686, 528CrossRefGoogle Scholar
Lucas, P. W., Roche, P. F., Allard, F., & Hauschildt, P. H. 2001, MNRAS, 326, 695CrossRefGoogle Scholar
Luhman, K. L. 1999, ApJ, 525, 466CrossRefGoogle Scholar
Luhman, K. L., Stauffer, J. R., Muench, A. A., Rieke, G. H., Lada, E. A., Bouvier, J., & Lada, C. J. 2003, ApJ, 593, 1093CrossRefGoogle Scholar
Martín, E. L., Brandner, W., Bouy, H., Basri, G., Davis, J., Deshpande, R., & Montgomery, M. M. 2006, A&A, 456, 253Google Scholar
Mentuch, E., Brandeker, A., van Kerkwijk, M. H., Jayawardhana, R., & Hauschildt, P. H. 2008, ArXiv e-printsGoogle Scholar
Mohanty, S., Basri, G., Jayawardhana, R., Allard, F., Hauschildt, P., & Ardila, D. 2004, ApJ, 609, 854CrossRefGoogle Scholar
Mohanty, S., Basri, G., Shu, F., Allard, F., & Chabrier, G. 2002, ApJ, 571, 469CrossRefGoogle Scholar
Mohanty, S., Jayawardhana, R., & Basri, G. 2005, ApJ, 626, 498CrossRefGoogle Scholar
Nakajima, T., Oppenheimer, B. R., Kulkarni, S. R., Golimowski, D. A., Matthews, K., & Durrance, S. T. 1995, Nature, 378, 463CrossRefGoogle Scholar
Pinfield, D. J., Jones, H. R. A., Lucas, P. W., Kendall, T. R., Folkes, S. L., Day-Jones, A. C., Chappelle, R. J., & Steele, I. A. 2006, MNRAS, 368, 1281CrossRefGoogle Scholar
Rebolo, R., Martin, E. L., & Magazzu, A. 1992, ApJL, 389, L83CrossRefGoogle Scholar
Rebolo, R., Zapatero-Osorio, M. R., & Martin, E. L. 1995, Nature, 377, 129CrossRefGoogle Scholar
Reiners, A. & Basri, G. 2008, ApJ, 684, 1390CrossRefGoogle Scholar
Reiners, A., Seifahrt, A., Stassun, K. G., Melo, C., & Mathieu, R. D. 2007, ApJL, 671, L149CrossRefGoogle Scholar
Richer, H. B., Dotter, A., Hurley, J. et al. , 2008, AJ, 135, 2141CrossRefGoogle Scholar
Saumon, D., Marley, M. S., Leggett, S. K. et al. , 2007, ApJ, 656, 1136CrossRefGoogle Scholar
Schmidt, S. J., Cruz, K. L., Bongiorno, B. J., Liebert, J., & Reid, I. N. 2007, AJ, 133, 2258CrossRefGoogle Scholar
Scholz, A., Jayawardhana, R., Wood, K., Meeus, G., Stelzer, B., Walker, C., & O'Sullivan, M. 2007, ApJ, 660, 1517CrossRefGoogle Scholar
Spitzer, L. J. & Schwarzschild, M. 1953, ApJ, 118, 106CrossRefGoogle Scholar
Stassun, K. G., Mathieu, R. D., & Valenti, J. A. 2006, Nature, 440, 311CrossRefGoogle Scholar
Stauffer, J. R., Schultz, G., & Kirkpatrick, J. D. 1998, ApJL, 499, L199+CrossRefGoogle Scholar
Stelzer, B., Micela, G., Flaccomio, E., Neuhäuser, R., & Jayawardhana, R. 2006, A&A, 448, 293Google Scholar
Vrba, F. J., Henden, A. A., Luginbuhl, C. B. et al. , 2004, AJ, 127, 2948CrossRefGoogle Scholar
Warren, S. J., Mortlock, D. J., Leggett, S. K. et al. , 2007, MNRAS, 381, 1400CrossRefGoogle Scholar
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, 785CrossRefGoogle Scholar
Wielen, R. 1977, A&A, 60, 263Google Scholar
Zapatero Osorio, M. R., Lane, B. F., Pavlenko, Y., Martín, E. L., Britton, M., & Kulkarni, S. R. 2004, ApJ, 615, 958CrossRefGoogle Scholar
Zapatero Osorio, M. R., Martín, E. L., Béjar, V. J. S., Bouy, H., Deshpande, R., & Wainscoat, R. J. 2007, ApJ, 666, 1205CrossRefGoogle Scholar