The Clusters AgeS Experiment (CASE). Analysis of the Detached Eclipsing Binary V15 in the Metal-Rich Open Cluster NGC 6253

• Autorzy: Rozyczka M. , Kaluzny J. , Thompson I. B. , Dotter A. , Pych W. , Narloch W.
• Języki publikacji: EN

Abstrakty

EN

We present the first detailed analysis of the detached eclipsing binary V15 in the super-metal rich open cluster NGC 6253. We obtain the following absolute parameters: M_p=1.303±0.006 M_Sun, R_p=1.71±0.03 R_Sun, L_p=2.98±0.10 L_Sun for the primary, and M_s=1.225±0.006 M_Sun, R_s=1.44±0.02 R_Sun, L_s=2.13±0.06 L_{Sun for the secondary. Based on Dartmouth isochrones, the age of NGC 6253 is estimated to be 3.80-4.25 Gyr from the mass-radius diagram and 3.9-4.6 Gyr from color-magnitude diagram fitting. Both of these estimates are significantly higher than those reported so far. The derived apparent distance modulus of 11.65 mag agrees well with the range of 10.9-12.2 mag derived by other authors; however our estimated reddening (0.113 mag) is lower than the lowest published value (0.15 mag). We confirm earlier observations that model atmospheres are not accurate enough to account for the whole CMD of the cluster, with the largest discrepancies appearing on the subgiant and giant branches. Although age estimation from the mass-radius diagram is a relatively safe, distance- and reddening-independent procedure, our results should be verified by photometric and spectroscopic observations of additional detached eclipsing binaries which we have discovered, at least two of which are proper-motion members of NGC 6253.}

Słowa kluczowe

EN

binaries: close; binaries: spectroscopic; open clusters: individual: NGC 6253; associations: individual: NGC 6253; stars: individual: V15-NGC 6253

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2014
• Tom: Vol. 64, No. 3
• Strony: 233--246
• Opis fizyczny: Bibliogr. 32 poz., rys., tab., wykr.

Twórcy

autor

Rozyczka M.

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

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

Pych W.

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

autor

Narloch W.

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

Bibliografia

• Allard, F. 2014, IAU Symposium, 299, 271.
• Anthony-Twarog B.J., Twarog, B.A., and Mayer, L. 2007, AJ, 133, 1585.
• Anthony-Twarog B.J., Deliyannis C.P., Twarog B.A., Cummings J.D., and Maderak R.M. 2010, AJ, 139, 2034.
• 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. M. Iye and A.F.M. Moorwood. Proceedings of the SPIE, 4841, 1694.
• Bragaglia, A., Tessicini, G., Tosi, M., Marconi, G., and Munari, U. 1997, MNRAS, 284, 477.
• Brogaard, K., et al. 2012, A&A, 543, A106.
• Carretta, E., Bragaglia, A., and Gratton, R. 2007, A&A, 473, 129.
• Claret, A. 2000, A&A, 363, 1081.
• Claret, A. 2007, A&A, 467, 1389.
• Coelho, P., Barbuy, B., Meléndez, J., Schiavon, R.P., and Castilho, B.V. 2005, A&A, 443, 735.
• Dotter, A., Chaboyer, B., Jevremovi´c, D., Kostov, V., Baron, E., and Ferguson, J.W. 2008, ApJS, 178, 89.
• Kaluzny, J., Rozyczka, M., Pych, W., and Thompson, I.B. 2014, Acta Astron., 64, 77 (Paper I).
• Kelson, D. D. 2003, PASP, 1125, 688.
• Mikolaitis, Š., G. Tautvaišien˙e, G., Gratton, R., Bragaglia, A., and Carretta, E. 2012, A&A, 541, A137.
• Montalto, M., Piotto, G., Desidera, S., Platais, I, Carraro, G., Momany, Y., de Marchi, F., and Recio-Blanco, A. 2009, A&A, 505, 1129.
• Montalto, M., et al. 2011, A&A, 535, A39.
• Montalto, M.N., et al. 2012, MNRAS, 423, 3039.
• Morales J. C., Ribas I., and Jordi C. 2008, A&A, 478, 507.
• Paczyński 1997, in: “Space Telescope Science Institute Series, The Extragalactic Distance Scale”, Ed. M. Livio, Cambridge University Press, p. 273.
• Piatti, A.E., Clariá, J.J., Bica, E., Geisler, D., and Minniti, D. 1998, AJ, 116, 801.
• Prša, A., and Zwitter, T. 2005, ApJ, 628, 426.
• Russell, H.N., and Merrill, J.E. 1952, in: “Contributions from the Princeton University Observatory”, p. 23.
• Sagar, R., Munari, U., and de Boer, K.S. 2001, MNRAS, 327, 23.
• Schlafly, E.F., and Finkbeiner, D.P. 2011, ApJ, 737, 103.
• Sestito, P., Randich, S., and Bragaglia, A. 2007, A&A, 465, 185.
• Sousa, S.G., Santos, N.C., Israelian, G., Lovis, C., Mayor, M., Silva, P.B., and Udry, S. 2011, A&A, 526, A99.
• Southworth, J., Maxted, P.F.L., and Smalley, B. 2004, MNRAS, 349, 547.
• Stetson P.B. 1987, PASP, 99, 191.
• Twarog, B.A., Anthony-Twarog, B.J., and De Lee, N. 2003, AJ, 125, 1383.
• Wilson, R.E. 1979, ApJ, 234, 1054.
• Wilson, R.E., and Devinney, E.J. 1971, ApJ, 166, 605.
• Zucker, S., and Mazeh, T. 1994, ApJ, 420, 806.