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Do Low Luminosity Stars Matter?

Published online by Cambridge University Press:  21 October 2010

María Teresa Ruiz
María Teresa Ruiz*
Affiliation:
Department of Astronomy, University of Chile, Casilla 36-D, Santiago, Chile email: [email protected]
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Abstract

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Historically, low luminosity stars have attracted very little attention, in part because they are difficult to see except with large telescopes, however, by neglecting to study them we are leaving out the vast majority of stars in the Universe. Low mass stars evolve very slowly, it takes them trillions of years to burn their hydrogen, after which, they just turn into a He white dwarf, without ever going through the red giant phase. This lack of observable evolution partly explains the lack of interest in them. The search for the “missing mass” in the galactic plane turned things around and during the 60s and 70s the search for large M/L objects placed M-dwarfs and cool WDs among objects of astrophysical interest. New fields of astronomical research, like BDs and exoplanets appeared as spin-offs from efforts to find the “missing mass”. The search for halo white dwarfs, believed to be responsible for the observed microlensing events, is pursued by several groups. The progress in these last few years has been tremendous, here I present highlights some of the great successes in the field and point to some of the still unsolved issues.

Keywords

starswhite dwarfslow massbrown dwarfsluminosity function
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Highlights H15: Highlights of Astronomy , November 2009 , pp. 47 - 60
Copyright
Copyright © International Astronomical Union 2010

References

Alcock, C. et al. (The MACHO Collaboration) 1997, ApJ 486, 697CrossRefGoogle Scholar
Alcock, C. et al. 2000, ApJ 542, 281CrossRefGoogle Scholar
Afonso, C. et al. 2000, ApJ 532, 340CrossRefGoogle Scholar
Baraffe, I., Chabrier, G., Allard, F., & Hauschild, PH. 1998, A&A 337, 403Google Scholar
Bergeron, P., Saumon, D., & Wesemael, F. 1995, ApJ 443, 764CrossRefGoogle Scholar
Bienaymé, O. 1999, A&A 341, 86Google Scholar
Bienaymé, O., Crézé, M., Chereul, E., & Pichon, C. 2006, ASP Conference Series vol. 182, p. 301Google Scholar
Bochanski, J. J., Hawley, S. L., Reid, I. N., Covey, K. R., West, A. A., Golimowski, D. A., & Ivezić, Z. 2009, Cool Stars, Stellar Systems and the Sun: 15 Cambridge Workshop ed. E. Stempels p. 977Google Scholar
Burgasser, A. J., Lépine, S., Lodieu, N., Scholz, R.-D., Delorme, P., Jao, W.-C., Swift, B. J., & Cushing, M. C. 2009, Cool Stars, Stellar Systems and the Sun: 15 Cambridge Workshop ed. Stempels, E. p. 242Google Scholar
Burgasser, A. J. et al. 2003, ApJ 592, 1186CrossRefGoogle Scholar
Burningham, B., et al. 2008, MNRAS 391, 320CrossRefGoogle Scholar
Burrows, A., Hubbard, W. B., Lunine, J. I., & Liebert, J. 2001, Rev. of Modern Physics 73, 719CrossRefGoogle Scholar
Burrows, A., Marley, M., Hubbard, W. B., Lunine, J. I., Gillot, T., Saumon, D., Freedman, R., Sudarsky, D., & Sharp, C. 1997, ApJ 491, 856CrossRefGoogle Scholar
Catalán, S., Isern, J., García-Berro, E., & Ribas, I. 2008, MNRAS 387, 1693CrossRefGoogle Scholar
Chabrier, G., Baraffe, I., Leconte, J., Gallardo, J., & Barman, T. 2009, Cool Stars, Stellar Systems and the Sun: 15 Cambridge Workshop ed. Stempels, E. p. 102Google Scholar
Chabrier, G. 2002, ApJ 567, 304CrossRefGoogle Scholar
Chabrier, G. 2001, ApJ 554, 1274CrossRefGoogle Scholar
Chabrier, G., Baraffe, I., Allard, F., & Hauschildt, P. H. 2000, ApJ 542, 464CrossRefGoogle Scholar
Chabrier, G. & Baraffe, I. 2000, Ann. Rev. Astron. Astrophys. 38, 337CrossRefGoogle Scholar
Crézé, M., Chereul, E., Bienaymé, O., & Pichon, C. 1998, A&A 329, 920Google Scholar
Cruz, K. L. et al. 2009, Astro2010: The Astronomy and Astrophysics Decadal Survey, Science White Papers, no. 60Google Scholar
Cruz, K. L. et al. 2007, AJ 133, 439CrossRefGoogle Scholar
Cushing, M. C., Looper, D., Burgasser, A. J., Kirkpatrick, J. D., Faherty, J., Cruz, K. L., Sweet, A., & Robyn, E. 2009, ApJ 696, 986CrossRefGoogle Scholar
Delorme, P., Delfosse, X., Albert, L., Artigau, E., Forveille, T., Reylé, C., Allard, F., Homeier, D., & Robin, A. 2008, Cool Stars, Stellar Systems and the Sun: 15 Cambridge Workshop ed. Stempels, E. p. 513Google Scholar
ESA 1997, Hopparcos Catalog ESA SP-1200Google Scholar
ESA 1992, Hopparcos Input Catalog ESA SP-1136Google Scholar
Faber, S. M., Burstein, D., Tinsley, B. M., & King, I. R. 1976, AJ 81, 45CrossRefGoogle Scholar
Fontaine, G. & Brassard, P. 2005, 14th European Workshop on White Dwarfs, ASP Conference Series eds. D. Koester and S. Moehler, p. 334Google Scholar
Fontaine, G., Brassard, P., & Bergeron, P. 2001, PASP 113, 409CrossRefGoogle Scholar
Geballe, , et al. 2002, ApJ 564, 466CrossRefGoogle Scholar
Gizis, J. E. & Reid, I. N. 1999, AJ 117, 508CrossRefGoogle Scholar
Gizis, J. E., Scholz, R. D., Irwin, M., & Jahreiss, H. 1997, MNRAS 292, 41Google Scholar
Gliese, W. 1972, QJRAS 13, 138Google Scholar
Harris, H. C. et al. 2006, AJ 131, 571CrossRefGoogle Scholar
Hernanz, M., García-Berro, E., Isern, J., Mochkovitch, R., Segretain, L., & Chabrier, G. 1994, ApJ 434, 652CrossRefGoogle Scholar
Holberg, J. B., Oswalt, T. D., & Sion, E. M. 2002, ApJ 571, 512CrossRefGoogle Scholar
Isern, J., García-Berro, E, Hernanz, M., Mochkovitch, R., & Torres, S. 1998, ApJ 503, 239CrossRefGoogle Scholar
Jones, D. H. P. 1973, MNRAS 161, 19CrossRefGoogle Scholar
Kirkpartrick, J. D., Beichman, C. A., & Skrutskie, M. F. 1997, ApJ 476, 311CrossRefGoogle Scholar
Kroupa, P. 2002, Science 295, 82CrossRefGoogle Scholar
Laughlin, G., Bodenheimer, P., & Adams, F. C. 1997, ApJ 482, 420CrossRefGoogle Scholar
Lasserre, T. et al. 2000, A&A 355, L39Google Scholar
Leggett, S. K., Burningham, B., Cushing, M. C., Marley, M. S., Pinfield, D. J., Saumon, D., Smart, R. L., & Warren, S. J. 2009, Cool Stars, Stellar Systems and the Sun: 15 Cambridge Workshop ed. E. Stempels p. 541Google Scholar
Lépine, S. 2009, Cool Stars, Stellar Systems and the Sun: 15 Cambridge Workshop ed. E. Stempels p. 545Google Scholar
Lépine, S. & Scholz, R-D 2008, ApJ 681, L33CrossRefGoogle Scholar
Lépine, S., Rich, R. M., & Shara, M. M. 2007, ApJ 669, 1235CrossRefGoogle Scholar
Liebert, J., Dahn, C. C., & Monet, D. G. 1988, ApJ 332, 891CrossRefGoogle Scholar
Lodieu, N., Leggett, S. K., Bergeron, P., & Nitta, A. 2009, ApJ 692, 1506CrossRefGoogle Scholar
Luyten, W. J. 1974, Proper Motion Survey with the 48-inch Schmidt Telescope, XLVIGoogle Scholar
Luyten, W. J. 1968, MNRAS 139, 221CrossRefGoogle Scholar
Marley, M. S., Seager, S., Saumon, D., Lodders, K., Ackerman, A. S., Freedman, R. S., & Xiaohui, F. 2002, ApJ 568, 335CrossRefGoogle Scholar
Mayor, M. & Queloz, D. 1995, Nature 378, 355CrossRefGoogle Scholar
Miller, G. E. & Scalo, J. M. 1979, ApJS 41, 513CrossRefGoogle Scholar
Monet, D. G., Dahn, C. C., Vrba, F. J., Harris, H. C., Pier, J. R., Luginbuhl, C. B., & Ables, H. D. 1992, AJ 103, 638CrossRefGoogle Scholar
Noh, H.-R. & Scalo, J. M. 1990, ApJ 352, 605CrossRefGoogle Scholar
Oort, J. H. 1965, Galactic Structure, ed. Schmidt, M., (University of Chicago Press)Google Scholar
Oppenheimer, B. R., Hambly, N. C., Digby, A. P., Hodkin, S. T., & Saumon, D. 2001, Science 292, 698CrossRefGoogle Scholar
Perna, R., Narayan, R., Rybicki, G., Stella, L., & Treves, A. 2006, ApJ 594, 936CrossRefGoogle Scholar
Reid, I. N. & Hawley, S. L. 2005, New Light on Dark Stars (Springer) p. 349CrossRefGoogle Scholar
Reid, I. N. & Gizis, J. E. 1997, AJ 113, 2246CrossRefGoogle Scholar
Reiners, A. & Basri, G. 2006, AJ 131, 1806CrossRefGoogle Scholar
Robin, A. C., Reylé, C., & Crézé, M. 2001, ASP Conference Series eds. Deiters, S., Fuchs, B., Just, A., Spurzem, R. & Wielen, R. vol. 228, p. 553Google Scholar
Rojas-Ayala, B. & Lloyd, J. P. 2009, Cool Stars, Stellar Systems and the Sun: 15 Cambridge Workshop ed. E. Stempels p. 776Google Scholar
Rojo, P. M. & Ruiz, M. T. 2003, AJ 126, 353CrossRefGoogle Scholar
Rowell, N. R., Hmably, N. C., & Bergeron, P. 2009, Journal of Physics: Conference Series 172, Issue 1Google Scholar
Ruiz, M. T. & Bergeron, P. 2001, ApJ 558, 761CrossRefGoogle Scholar
Ruiz, M. T., Leggett, S. K., & Allard, F. 1997, ApJ 491, L107CrossRefGoogle Scholar
Salaris, M., Serenelli, A., Weiss, A., & Miller-Bertolami, M. 2009, ApJ 692, 1013CrossRefGoogle Scholar
Sanduleak, N. 1965, PhD Thesis, Case Institute of TechnologyGoogle Scholar
Sandage, A. R & Eggen, O. J. 1959, MNRAS 119, 278CrossRefGoogle Scholar
Schmidt, M. 1974, Highlights of Astronomy ed. G. Contopoulos (Reidel) vol. 3, p. 450.Google Scholar
Tarter, J. C. 1974, PhD Thesis, University of Californiaat BerkeleyGoogle Scholar
Udalsky, A. et al. 1998, Acta Astron. 48, 431Google Scholar
van Rhijn, P. J. 1936, Pub. KartyenAstr. Lab. Grningen No. 47Google Scholar
Weistrop, D. W. 1976, ApJ 204, 113CrossRefGoogle Scholar
Weistrop, D. W. 1972, AJ 77, 849CrossRefGoogle Scholar
Winget, D. E., Hansen, C. J., Liebert, J., Van Horn, H. M., Fontaine, G., Nather, R. E., Kepler, S. O., & Lamb, D. Q. 1987, ApJ 315, L77CrossRefGoogle Scholar
Wood, M. A. 1992, ApJ 386, 539CrossRefGoogle Scholar