Publication: Reliable probabilistic determination of membership in stellar kinematic groups in the young disk
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2014-07
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EDP Sciences
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Context. Over the last century, the overdensities in the velocity distributions of nearby stars were attributed to stellar kinematic groups or moving groups. Although their reality was initially questioned, their existence is now supported by a confluence of evidence.
Aims. To pursue investigations, quantitative methods should be clearly defined to identify new stars belonging to these groups. Here, we present two probabilistic methods to determine the likelihood of kinematic membership for possible candidates in five of the known young stellar kinematic groups – namely, Pleiades, IC 2391, Castor, Ursa Major, and Hyades – in which all are younger than 650 Myr. Methods. We tried different methods to handle kinematic data of their known members.We succeeded in developing two independent procedures able to identify new candidates of these five stellar stream. We tested the robustness of our two approaches by means of extensive Monte Carlo simulations.
Results. Our methods are consistent with one another in more than 90% of cases and for almost all the stellar kinematic groups under scrutiny. The IC2391 supercluster is an exception. Applying our statistical methods to a large sample of young low-mass stars, we confirmed almost all the likely members and good candidates of these stellar streams. We also proposed 39 additional candidates based on the agreement and the high likelihood of age and kinematic membership.
Conclusions. These probabilistic methods are very powerful to reliably identify new candidate members of young stellar kinematic groups. However, the kinematic criteria alone are not sufficient to distinguish between coeval stars that are evaporated from open clusters and other field stars trapped by dynamical processes generated by galactic perturbations. The identification of stars belonging to the remnant of a past star-forming event can be possible with the help of additional information, such as indicators of chromospheric activity, age proxies (lithium abundance), and chemical composition.
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©ESO 2014. The authors thank the anonymous referee for constructive comments that improved the paper. The financial support as provided by the Universidad Complutense de Madrid (UCM), the Spanish Ministerio de Ciencia e Innovación (MCINN) under grants AYA2011-30147-C03-02, and the Comunidad de Madrid under PRICIT project S2009/ESP-1496 (AstroMadrid) This work was also partially supported by the Italian Ministero dell'Istruzione, Universita e Ricerca (MIUR), which is gratefully acknowledged.
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Allen, P. R., & Reid, I. N. 2008, AJ, 135, 2024
Allers, K. N., Liu, M. C., Shkolnik, E., et al. 2009, ApJ, 697, 824
Antoja, T., Valenzuela, O., Pichardo, B., et al. 2009, ApJ, 700, L78
Asiain, R., Figueras, F., Torra, J., & Chen, B. 1999, A&A, 341, 427
Bertout, C., & Genova, F. 2006, A&A, 460, 499
Beuzit, J.-L., Ségransan, D., Forveille, T., et al. 2004, A&A, 425, 997
Biazzo, K., Frasca, A., Marilli, E., et al. 2009, A&A, 499, 579
Bobylev, V. V., Goncharov, G. A., & Bajkova, A. T. 2006, Astron. Rep., 50, 733
Bovy, J., & Hogg, D. W. 2010, ApJ, 717, 617
Bovy, J., Hogg, D. W., & Roweis, S. T. 2009, ApJ, 700, 1794
Bowler, B. P., Liu, M. C., Shkolnik, E. L., et al. 2012, ApJ, 753, 142
Chakrabarty, D. 2007, A&A, 467, 145
Chauvin, G., Lagrange, A.-M., Bonavita, M., et al. 2010, A&A, 509, A52
Chereul, E., Crézé, M., & Bienaymé, O. 1998, A&A, 340, 384
Chereul, E., Crézé, M., & Bienaymé, O. 1999, A&AS, 135, 5
Daemgen, S., Siegler, N., Reid, I. N., & Close, L. M. 2007, ApJ, 654, 558
de Silva, G. M., Freeman, K. C., Bland-Hawthorn, J., et al. 2011, MNRAS, 415, 563
De Simone, R., Wu, X., & Tremaine, S. 2004, MNRAS, 350, 627
Dehnen, W. 1998, AJ, 115, 2384
Eggen, O. J. 1958, MNRAS, 118, 65
Eggen, O. J. 1973a, PASP, 85, 289
Eggen, O. J. 1973b, PASP, 85, 379
Eggen, O. J. 1989, PASP, 101, 366
Eggen, O. J. 1994, AJ, 107, 594
Eggen, O. J. 1995, AJ, 110, 2862
Eggen, O. J. 1996, AJ, 112, 1595
Eggen, O. J., & Iben, Jr., I. 1988, AJ, 96, 635
Eisenbeiss, T., Ammler-von Eiff, M., Roell, T., et al. 2013, A&A, 556, A53
Eyer, L., Palaversa, L., Mowlavi, N., et al. 2012, Ap&SS, 341, 207
Famaey, B., Jorissen, A., Luri, X., et al. 2005, A&A, 430, 165
Famaey, B., Pont, F., Luri, X., et al. 2007, A&A, 461, 957
Famaey, B., Siebert, A., & Jorissen, A. 2008, A&A, 483, 453
Feltzing, S., & Holmberg, J. 2000, A&A, 357, 153
Fernández, D., Figueras, F., & Torra, J. 2008, A&A, 480, 735
Fröhlich, H.-E., Frasca, A., Catanzaro, G., et al. 2012, A&A, 543, A146
Gagné, J., Lafrenière, D., Doyon, R., Malo, L., & Artigau, É. 2014, ApJ, 783, 121
García López, R. J., Randich, S., Zapatero Osorio, M. R., & Pallavicini, R. 2000, A&A, 363, 958
Gizis, J. E., Reid, I. N., & Hawley, S. L. 2002, AJ, 123, 3356
Griffin, R. F. 1998, The Observatory, 118, 223
Guillout, P., Klutsch, A., Frasca, A., et al. 2009, A&A, 504, 829
Guillout, P., Frasca, A., Klutsch, A., Marilli, E., & Montes, D. 2010, A&A, 520, A94
Janson, M., Hormuth, F., Bergfors, C., et al. 2012, ApJ, 754, 44
Klutsch, A. 2008, Ph.D. thesis, Observatoire de Strasbourg, Universié Louis Pasteur, France
Klutsch, A., Guillout, P., Frasca, A., et al. 2011a, in Highlights of Spanish Astrophysics VI, eds. M. R. Zapatero Osorio, J. Gorgas, J. Maíz Apellániz, J. R. Pardo, & A. Gil de Paz, 534
Klutsch, A., Montes, D., Guillout, P., et al. 2011b, in 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, eds. C. Johns-Krull, M. K. Browning, & A. A. West, ASP Conf. Ser., 448, 661
Klutsch, A., Montes, D., Guillout, P., et al. 2012, in SF2A-2012: Proc. of the Annual meeting of the French Society of Astronomy and Astrophysics, eds. S. Boissier, P. de Laverny, N. Nardetto, et al., 361
López-Santiago, J.,Montes, D., Crespo-Chacón, I., & Fernández-Figueroa, M. J. 2006, ApJ, 643, 1160
López-Santiago, J., Micela, G., & Montes, D. 2009, A&A, 499, 129
López-Santiago, J., Montes, D., Gálvez-Ortiz, M. C., et al. 2010, A&A, 514, A97
Luyten,W. J.,&Hughes, H. S. 1980, ProperMotion Survey with the Forty- Eight Inch Schmidt Telescope, Vol. LV, first supplement to the NLTT Catalogue (Minneapolis: University of Minnesota), 1
Mädler, J. H. 1846, Astron. Nachr., 24, 213
Malo, L., Doyon, R., Lafrenière, D., et al. 2013, ApJ, 762, 88
McMillan, P. J. 2013, MNRAS, 430, 3276
Minchev, I., & Famaey, B. 2010, ApJ, 722, 112
Minchev, I., & Quillen, A. C. 2007, MNRAS, 377, 1163
Minchev, I., Boily, C., Siebert, A., & Bienaymé, O. 2010, MNRAS, 407, 2122
Montes, D., López-Santiago, J., Gálvez, M. C., et al. 2001, MNRAS, 328, 45
Pelat, D. 2006, in Bases et méthodes pour le traitement des données, Master’s degree 2nd year handbook (Université de Strasbourg, France)
Pompéia, L., Masseron, T., Famaey, B., et al. 2011, MNRAS, 415, 1138
Proctor, R. A. 1869, Roy. Soc. London Proc. Ser. I, 18, 169
Quillen, A. C. 2003, AJ, 125, 785
Quillen, A. C., & Minchev, I. 2005, AJ, 130, 576
Randich, S., Schmitt, J. H. M. M., & Prosser, C. 1996, A&A, 313, 815
Reid, I. N., Hawley, S. L., & Gizis, J. E. 1995, AJ, 110, 1838
Röser, S., Schilbach, E., Piskunov, A. E., Kharchenko, N. V., & Scholz, R.-D. 2011, A&A, 531, A92
Sellwood, J. A. 2010, MNRAS, 409, 145
Sellwood, J. A. 2011, MNRAS, 410, 1637
Shkolnik, E. L., Liu, M. C., & Reid, I. N. 2009, ApJ, 699, 649
Shkolnik, E. L., Hebb, L., Liu, M. C., Reid, I. N., & Collier Cameron, A. 2010, ApJ, 716, 1522
Shkolnik, E. L., Anglada-Escudé, G., Liu, M. C., et al. 2012, ApJ, 758, 56
Skuljan, J., Hearnshaw, J. B., & Cottrell, P. L. 1999, MNRAS, 308, 731
Tabernero, H. M., Montes, D., & González Hernández, J. I. 2012, A&A, 547, A13
Taylor, B. J. 2000, A&A, 362, 563
Torra, J., Fernández, D., & Figueras, F. 2000, A&A, 359, 82
Torres, C. A. O., Quast, G. R., da Silva, L., et al. 2006, A&A, 460, 695
Torres, C. A. O., Quast, G. R., Melo, C. H. F., & Sterzik, M. F. 2008, in Handbook of Star Forming Regions, Volume II, ed. B. Reipurth, 5, 757
Zuckerman, B., & Song, I. 2004, ARA&A, 42, 685
Zuckerman, B., Rhee, J. H., Song, I., & Bessell, M. S. 2011, ApJ, 732, 61