The Clusters AgeS Experiment (CASE). VI. Analysis of Two Detached Eclipsing Binaries in the Globular Cluster M55

• Autorzy: Kaluzny J. , Thompson I. B. , Dotter A. , Rozyczka M. , Pych W. , Rucinski S. M. , Burley G. S.
• Języki publikacji: EN

Abstrakty

EN

We present an analysis of the detached eclipsing binaries V44 and V54 belonging to the globular cluster M55. For V54 we obtain the following absolute parameters: M_p=0.726±0.015 M_sun, R_p=1.006± 0.009 R_sun, L_p=1.38±0.07 L_sun for the primary, and M_s=0.555± 0.008 M_sun, R_s=0.528±0.005 Rsun, L_s=0.16±0.01 L_sun for the secondary. The age and apparent distance modulus of V54 are estimated at 13.3-14.7 Gyr and 13.94±0.05 mag, respectively. This derived age is substantially larger than ages we have derived from the analysis of binary systems in 47 Tuc and M4. The secondary of V44 is so weak in the optical domain that only mass function and relative parameters are obtained for the components of this system. However, there is a good chance that the velocity curve of the secondary could be derived from near-IR spectra. As the primary of V44 is more evolved than that of V54, such data would impose much tighter limits on the age and distance of M55.

Słowa kluczowe

EN

binaries: close; binaries: spectroscopic; globular clusters: individual: M55; stars: individual: V44-M55; stars: individual: V54-M55

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2014
• Tom: Vol. 64, No. 1
• Strony: 11--26
• Opis fizyczny: Bibliogr. 36 poz., rys., tab., wykr.

Twórcy

autor

Kaluzny J.

• Nicolaus Copernicus Astronomical Center, ul. Bartycka 18, 00-716 Warsaw, Poland

autor

Thompson I. B.

• The Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101, USA

autor

Dotter A.

• Research School of Astronomy and Astrophysics, Australian National University, Canberra, Australia

autor

Rozyczka M.

• Nicolaus Copernicus Astronomical Center, ul. Bartycka 18, 00-716 Warsaw, Poland

autor

Pych W.

• Nicolaus Copernicus Astronomical Center, ul. Bartycka 18, 00-716 Warsaw, Poland

autor

Rucinski S. M.

• Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4, Canada

autor

Burley G. S.

• The Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101, USA

Bibliografia

• Alard, C., and Lupton, R.H. 1998, ApJ, 503, 325.
• Alves, J., Lombardi, M., and Lada, J.C. 2014, arXiv:1401.2857.
• Bernstein, R., Shectman, S.A., Gunnels, S.M., Mochnacki, S., and Athey, A.E. 2003, in: “Instrument Design and Performance for Optical/Infrared Ground-based Telescopes”, Eds. Masanori Iye and Alan F.M. Moorwood. Proceedings of the SPIE, 4841, 1694.
• Carretta, E., Bragaglia, A., Gratton, R., and Lucatello, S. 2009, A&A, 505, 139.
• Carretta, E., Bragaglia, A., Gratton, R., Lucatello, S., Bellazzini,M., and D’Orazi, V. 2010, ApJ, 712, L21.
• Casagrande, L., Ramírez, I., Meléndez, J., Bessell, M., and Asplund, M. 2010, A&A, 512, 54.
• Castelli, F., and Kurucz, R.L. 2004, arXiv:astro-ph/0405087.
• Claret, A. 2000, A&A, 363, 1081.
• Coelho, P., Barbuy, B., Meléndez, J., Schiavon, R.P., and Castilho, B.V. 2005, A&A, 443, 735.
• Di Benedetto, G.P. 2005, MNRAS, 357, 174.
• Dotter, A., Chaboyer, B., Jevremovi´c, D., Kostov, V., Baron, E., and Ferguson, J.W. 2008, ApJS, 178, 89.
• Dotter, A., Kaluzny, J., and Thompson, I.B. 2009, in: “The Ages of Stars”, Proceedings of the 258th Symposium of the IAU, Eds. E. Mamajek, D. Soderblom, and R. Wyse, 171.
• Dotter, A., et al. 2010, AJ, 708, 698.
• González-Hernández, J.I., and Bonifacio, P. 2009, A&A, 497, 497.
• Hansen, B.M.S., et al. 2013, Nature, 500, 51.
• Harris, W.E. 1996, AJ, 112, 1487 (2010 online edition).
• Kaluzny, J., Thompson, I.B., Krzeminski, W., and Pych, W. 1999, A&A, 350, 469.
• Kaluzny, J., et al. 2005, in: “Stellar Astrophysics with the World’s Largest Telescopes”, AIP Conf. Proc., 752, 70.
• Kaluzny, J., Thompson, I.B., Krzeminski, W., and Zloczewski, K. 2010, Acta Astron., 60, 245.
• Kaluzny, J., et al. 2013, AJ, 145, 43.
• Kelson, D.D. 2003, PASP, 1125, 688.
• Lafler, J., and Kinman, T.D. 1965, ApJS, 11, 216.
• Lane, R.R., Kiss, L.L., Lewis, G.F., Ibata, R.A., Siebert, A., Bedding, T.R., and Székely, P. 2010, MNRAS, 401, 2521.
• Prša, A., and Zwitter, T. 2005, ApJ, 628, 426.
• Richter, P., Hilker, M., and Richtler, T. 1999, A&A, 350, 476.
• Schechter, P.L., Mateo, M., and Saha, A. 1993, PASP, 105, 1342.
• Schlafly, E.F., Finkbeiner, D.P., Schlegel, D.J., Juri´c, M., Ivezi´c, Ž., Gibson, R.R., Knapp, G.R., and Weaver, B.A. 2010, ApJ, 725, 1175.
• Schlegel D.J., Finkbeiner D.P., and Davis M. 1998, ApJ, 500, 525.
• Southworth, J., Maxted, P.F.L., and Smalley, B. 2004, MNRAS, 349, 547.
• Thompson, I.B., Kaluzny, J., Rucinski, S.M., Krzeminski, W., Pych, W., Dotter, A., and Burley, G.S. 2010, AJ, 139, 329.
• VandenBerg, D.A., Bergbusch, P.A., Dotter, A., Ferguson, J.W., Michaud, G., Richer, J., and Proffitt, C.R. 2012, ApJ, 755, 15.
• Vargas Álvarez, C.A., and Sandquist, E.L. 2007, AJ, 134, 825.
• Wilson, R.E. 1979, ApJ, 234, 1054.
• Wilson, R.E., and Devinney, E.J. 1971, ApJ, 166, 605.
• Zloczewski, K., Kaluzny, J., Rozyczka, M., Krzeminski, W., and Mazur, B. 2012, Acta Astron., 62, 357.
• Zucker, S., and Mazeh, T. 1994, AJ, 420, 806.