Hostname: page-component-6d856f89d9-72csx Total loading time: 0 Render date: 2024-07-16T03:41:18.975Z Has data issue: false hasContentIssue false
  • English
  • Français

Searching for Planets of Brown Dwarfs1

Published online by Cambridge University Press:  26 May 2016

Eike Guenther  and
Guenther Wuchterl
Eike Guenther
Affiliation:
Thüringer Landessternwarte Tautenburg, 07778 Tautenburg, Germany
Guenther Wuchterl
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik (MPE), Giessenbachstr. 1, 85741 Garching, Germany

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Up to now, most planet search projects have concentrated on G and K stars. In order to considerably widen the view, we have stated a survey for planets of old, nearby brown dwarfs and very low-mass stars. Using UVES, we have observed 26 brown dwarfs and very low-mass stars. As it turned out these objects are very inactive and thus highly suitable for such a project. For 19 objects, we can exclude a planet with the mass of 3 MJ, and a period of 100 days or less with a probability of more than 60%. For these objects, we can also exclude Pegasi-planets with a high probability. For another 4 objects, we can exclude at least a brown dwarf companion. One object is a double line spectroscopic binary, and one object shows significant radial-velocity variations that can not be caused by a normal stellar-spot. This object either has a planetary-mass companion, or the variations are caused by surface structures that are quite different from normal star-spots.

Type
Part 6. Searches for Substellar Companions
Information
Symposium - International Astronomical Union , Volume 211: Brown Dwarfs , 2003 , pp. 225 - 232
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

Apai, D. et al. 2002a, this conference Google Scholar
Apai, D., Pascucci, I., Henning, Th., Sterzik, M.F., Klein, R., Semenov, D., Guenther, E., Stecklum, B. 2002b, A&A, in press Google Scholar
Basri, G. Marcy, G.W. 1995, AJ, 109, 762 Google Scholar
Berger, E., Ball, S., Becker, K.M., Clarke, M., Frail, D.A., Fukuda, T.A., Hoffman, I.M., Mellon, R., Momjian, E., Murphy, N.W., Teng, S.H., Woodruff, T., Zauderer, B.A., Zavala, R.T. 2001, Nature, 410, 338 Google Scholar
Comerón, F., Neuhäuser, R., Kaas, A. A. 2000, A&A, 359, 269 Google Scholar
Hayashi, 1981 in IAU Symp. 93, Fundamental problems in the theory of stellar evolution, (Dordrecht, D. Reidel), 113 Google Scholar
Chabrier, G., Brassard, P., Fontaine, G., Saumon, D. 2000, ApJ,543, 216 Google Scholar
Martín, E.L., Ardila, D.R. 2001, AJ, 121, 2758 Google Scholar
Muench, A.A., Alves, J., Lada, C.J., Lada, E.A. 2001, ApJ, 558, L51 Google Scholar
Natta, A., Testi, L., 2001, A&A, 376, L22 Google Scholar
Paulson, D.B., Saar, S.H., Cochran, W.D., Hatzes, A.P. 2002, AJ, 124, 572 CrossRefGoogle Scholar
Persi, P., Marenzi, A. R., Olofsson, G. et al. 2000, A&A, 357, 219 Google Scholar
Reid, I. N., Hawley, S.L., Gizis, J.E. 1995, AJ, 110, 1838 CrossRefGoogle Scholar
Rutledge, R. E., Basri, G., Martín, E. L., Bildsten, L. 2000, ApJ, 538, L141 Google Scholar
Saar, S.H., Donahue, R.A. 1997, ApJ, 485, 319 Google Scholar
Sasselov, D.D., Lecar, M. 2000, ApJ, 528, 995 Google Scholar
Schmitt, J.H.M.M., Liefke, C. 2002, A&A, 382, L9 Google Scholar
Stauffer, J.R., Balachandran, S.C., Krishnamurthi, A., Pinsonneault, M., Terndrup, D.M., Stern, R.A. 1997, ApJ, 475, 604 Google Scholar
Mokler, F., Stelzer, B. 2002, A&A, 391, 1025 Google Scholar
Testi, L., Natta, A., Oliva, E., D'Antona, F., Comerón, F., Baffa, C., Comoretto, G., Gennari, , 2002, ApJ, 571, L155 CrossRefGoogle Scholar
Tinney, C.G., Reid, I.N. 1998, MNRAS, 301, 1031 Google Scholar
Tinney, C.G., Tolley, A.J. 1999, MNRAS, 304, 119 Google Scholar