A galex-based search for the sparse young stellar population in the taurus-aurigae star forming region

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In this work, we identify 63 bona fide new candidates to T Tauri stars (TTSs) in the Taurus-Auriga region, using its ultraviolet excess as our baseline. The initial data set was defined from the GALEX all sky survey (AIS). The GALEX satellite obtained images in the near-ultraviolet (NUV) and far-ultraviolet (FUV) bands where TTSs show a prominent excess compared with main-sequence or giants stars. GALEX AIS surveyed the Taurus-Auriga molecular complex, as well as a fraction of the California Nebula and the Perseus complex; bright sources and dark clouds were avoided. The properties of TTSs in the ultraviolet (GALEX), optical (UCAC4), and infrared (2MASS) have been defined using the TTSs observed with the International Ultraviolet Explorer reference sample. The candidates were identified by means of a mixed ultraviolet-optical-infrared excess set of colors; we found that the FUV-NUV versus J-K color-color diagram is ideally suited for this purpose. From an initial sample of 163,313 bona fide NUV sources, a final list of 63 new candidates to TTSs in the region was produced. The search procedure has been validated by its ability to detect all known TTSs in the area surveyed: 31 TTSs. Also, we show that the weak-lined TTSs are located in a well-defined stripe in the FUV-NUV versus J-K diagram. Moreover, in this work, we provide a list of TTSs photometric standards for future GALEX-based studies of the young stellar population in star forming regions.
© 2015. The American Astronomical Society. All rights reserved. This research was partially supported by grant AYA2011-29754-C03-01 from the Government of Spain.
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Alencar, S. H. P., Melo, C. H. F., Dullemond, C. P., et al. 2003, A&A, 409, 1037 Allard, F., Homeier, D., & Freytag, B. 2011, in ASP Conf. Ser. 448, 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, ed. C. M. Johns-Krull, M. K. Browning, & A. A. West (San Francisco, CA: ASP), 91 Allard, F., Homeier, D., Freytag, B., & Sharp, C. M. 2012, in EAS Publication Ser., Vol. 57, Low-mass Stars and the Transition Stars/Brown Dwarfs, ed. C. Reylé, C. Charbonnel, & M. Schultheis (Cambridge: Cambridge Univ. Press), 3 Ardila, D. R., Herczeg, G. J., Gregory, S. G., et al. 2013, ApJS, 207, 1 Basri, G., & Batalha, C. 1990, ApJ, 363, 654 Bayo, A., Rodrigo, C., Barrado Y Navascués, D., et al. 2008, A&A, 492, 277 Bianchi, L., Conti, A., & Shiao, B. 2014, AdSpR, 53, 900 Bianchi, L., Herald, J., Efremova, B., et al. 2011, Ap&SS, 335, 161 Calvet, N., & Gullbring, E. 1998, ApJ, 509, 802 Chabrier, G., Baraffe, I., Allard, F., & Hauschildt, P. 2000, ApJ, 542, 464 Davis, C. J., Chrysostomou, A., Hatchell, J., et al. 2010, MNRAS, 405, 759 de Bruijne, J. H. J., Hoogerwerf, R., & de Zeeuw, P. T. 2001, A&A, 367, 111 Ducourant, C., Teixeira, R., Périé, J. P., et al. 2005, A&A, 438, 769 Dullemond, C. P., Hollenbach, D., Kamp, I., & D’Alessio, P. 2007, in Protostars and Planets V, ed. B. Reipurth, D. Jewitt, & K. Keil (Tucson, AZ: Univ. Arizona Press), 555 Esplin, T. L., Luhman, K. L., & Mamajek, E. E. 2014, ApJ, 784, 126 Feigelson, E. D., Getman, K., Townsley, L., et al. 2005, ApJS, 160, 379 Findeisen, K., & Hillenbrand, L. 2010, AJ, 139, 1338 Findeisen, K., Hillenbrand, L., & Soderblom, D. 2011, AJ, 142, 23 Fitzpatrick, E. L. 1999, PASP, 111, 63 France, K., Linsky, J. L., Brown, A., Froning, C. S., & Béland, S. 2010, ApJ, 715, 596 France, K., Schindhelm, E., Herczeg, G. J., et al. 2012, ApJ, 756, 171 France, K., Yang, H., & Linsky, J. L. 2011, ApJ, 729, 7 Furlan, E., Luhman, K. L., Espaillat, C., et al. 2011, ApJS, 195, 3 Gómez de Castro, A. I. 1997, A&A, 323, 541 Gómez de Castro, A. I. 2009, ApJL, 698, L108 Gómez de Castro, A. I. 2013a, in Planets, Stars and Stellar Systems. Vol. 4: Stellar Structure and Evolution, ed. T. D. Oswalt & M. A. Barstow (Dordrecht: Springer), 279 Gómez de Castro, A. I. 2013b, ApJ, 775, 131 Gómez de Castro, A. I., & Franqueira, M. 1997, ApJ, 482, 465 Gómez de Castro, A. I., López Santiago, J., López Martínez, F., et al. 2015, MNRAS, submitted Gómez de Castro, A. I., López Santiago, J., Sestito, P., et al. 2011, Ap&SS, 335, 97 Gómez de Castro, A. I., & Marcos Arenal, P. 2012, ApJ, 749, 190 Gómez de Castro, A., & Pudritz, R. E. 1992, ApJ, 395, 501 Gómez de Castro, A. I., & Verdugo, E. 2003, ApJ, 597, 443 Hauschildt, P. H., Allard, F., & Baron, E. 1999, ApJ, 512, 377 Herbig, G. H., & Bell, K. R. 1988, LicOB, 1111, 90 Herczeg, G. J., Linsky, J. L., Valenti, J. A., Johns-Krull, C. M., & Wood, B. E. 2002, ApJ, 572, 310 Heyer, M. H., & Brunt, C. M. 2012, MNRAS, 420, 1562 Hutchinson, M. G., Evans, A., Winkler, H., & Spencer Jones, J. 1990, A&A, 234, 230 Ingleby, L., Calvet, N., Herczeg, G., et al. 2013, ApJ, 767, 112 Jensen, E. L. N., Cohen, D. H., & Gagne, M. 2009, ApJ, 703, 252 Kenyon, S. J., Gómez, M., & Whitney, B. 2008, in Handbook of Star Forming Regions, Vol. 1: The Northern Sky, ed. B. Reipurth (San Francisco, CA: ASP), 405 Kohoutek, L., & Wehmeyer, R. 1999, A&AS, 134, 255 Lada, C. J. 1983, RMxAA, 7, 231 Lamzin, S. A. 1998, ARep, 42, 322 Lépine, S., & Gaidos, E. 2011, AJ, 142, 138 Li, J. Z., & Hu, J. Y. 1998, A&AS, 132, 173 Lombardi, M., Lada, C. J., & Alves, J. 2010, A&A, 512, AA67 Mendoza, V., & Eugenio, E. 1968, ApJ, 151, 977 Meyer, M. R., Calvet, N., & Hillenbrand, L. A. 1997, AJ, 114, 288 Moneti, A., Pipher, J. L., Helfer, H. L., McMillan, R. S., & Perry, M. L. 1984, ApJ, 282, 508 Montmerle, T., Koch-Miramond, L., Falgarone, E., & Grindlay, J. E. 1983, ApJ, 269, 182 Morrissey, P., Conrow, T., Barlow, T. A., et al. 2007, ApJS, 173, 682 Neuhaeuser, R., Sterzik, M. F., Schmitt, J. H. M. M., Wichmann, R., & Krautter, J. 1995, A&A, 295, L5 O’dell, C. R., Wen, Z., & Hu, X. 1993, ApJ, 410, 696 Padgett, D. L., Cieza, L., Stapelfeldt, K. R., et al. 2006, ApJ, 645, 1283 Preibisch, T. 2004, Ap&SS, 292, 631 Rebull, L. M., Koenig, X. P., Padgett, D. L., et al. 2011, ApJS, 196, 4 Siess, L., Dufour, E., & Forestini, M. 2000, A&A, 358, 593 Skrutskie, M. F., Cutri, R. M., Stiening, R., et al. 2006, AJ, 131, 1163 Strom, K. M., Strom, S. E., & Vrba, F. J. 1976, AJ, 81, 308 Takita, S., Kataza, H., Kitamura, Y., et al. 2010, A&A, 519, AA83 Ungerechts, H., & Thaddeus, P. 1987, ApJS, 63, 645 Valenti, J. A., Johns-Krull, C. M., & Linsky, J. L. 2000, ApJS, 129, 399 Watson, A. M., Stapelfeldt, K. R., Wood, K., & Ménard, F. 2007, in Protostars and Planets V, ed. B. Reipurth, D. Jewitt, & K. Keil (Tucson, AZ: Univ. Arizona Press), 523 Webb, R. A., Zuckerman, B., Platais, I., et al. 1999, ApJL, 512, L63 Wenger, M., Ochsenbein, F., Egret, D., et al. 2000, A&AS, 143, 9 Wichmann, R., Krautter, J., Schmitt, J. H. M. M., et al. 1996, A&A, 312, 439 Wilking, B. A., & Lada, C. J. 1983, ApJ, 274, 698 Yang, H., Herczeg, G. J., Linsky, J. L., et al. 2012, ApJ, 744, 121 Yuan, H. B., Liu, X. W., & Xiang, M. S. 2013, MNRAS, 430, 2188 Zacharias, N., Finch, C. T., Girard, T. M., et al. 2013, AJ, 145, 44