Artículo
Abstract:
The first photoelectric analysis of the W UMa system LT Pav, based on U, B and V light curves, is presented. The light curves are modeled using the Wilson-Devinney approach. Single passband and multi passband solutions made with normal points against those obtained using individual observations are compared. Solutions were performed keeping the gravity darkening exponent fixed, and the effects of letting it vary with the rest of the main adjustable parameters from a "conservative" converged solution, or from the beginning of the solution are investigated. The main results are that iterations should be continued until all adjustable parameters stabilize, and that a solution can be found starting with normal points and switching afterwards to individual observations without lost of accuracy and reaching convergence in a few iterations. Two final solutions are found. One is characterized mainly by a high g and a low degree of overcontact, the other by the opposite. The primary (more massive) component is in a moderate stage of evolution based in its mean density and color. Preliminary absolute dimensions are derived. The radius of the primary exceeds that of a normal MS star of the same effective temperature by 17% if the temperature correction due to luminosity transfer is considered, and by 30% if the correction is not taken into account. LT Pav would be a W UMa system with the most massive primary known to date, if the absolute dimensions can be confirmed.
Registro:
| Documento: | Artículo |
| Título: | Differential corrections analysis of the UBV observations of LT Pavonis |
| Autor: | Cerruti, M.A. |
| Filiación: | Inst. Astronomia Fis. Espacio, CC 67, Suc. 28, 1428 Buenos Aires, Argentina Carrera del Investigador Cientifico, CONICET, Buenos Aires, Argentina |
| Palabras clave: | Binaries; Close - Stars; Eclipsing - Binaries; Individual; LT Pav |
| Año: | 1999 |
| Volumen: | 45 |
| Número: | 2 |
| Página de inicio: | 399 |
| Página de fin: | 418 |
| Título revista: | Acta Astronomica |
| Título revista abreviado: | Acta Astron. |
| ISSN: | 00015237 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00015237_v45_n2_p399_Cerruti |
Referencias:
- Al-Naimiy, H.M., (1978) Astrophys. Sp. Science, 53, p. 181
- Cerruti, M.A., (1994) Acta Astron., 44, p. 291
- De Landtsheer, A.C., (1983) Astron. Astrophys. Suppl. Ser., 52, p. 213
- Eaton, J.A., Wu, C.-C., Ruciński, S.M., (1992) Astrophys. J., 239, p. 919
- Harmanec, P., (1988) Bull. Astron. Inst. Czechosl., 39, p. 329
- Hilditch, R.W., King, D.J., McFarlane, T.M., (1988) MNRAS, 231, p. 341
- Kaluzny, J., (1985) Acta Astron., 35, p. 313
- Kang, Y.W., Wilson, R.E., (1989) Astron. J., 97, p. 848
- Kitamura, M., (1990) Active Close Binaries, p. 69. , Ed. C. Ibanoǧlu, Kluwer Ac. Publishers
- Koch, R., (1991) Reports on Astronomy, 21 A, p. 479. , Ed. D. McNally, Kluwer Ac. Publishers
- Leung, K.-C., Schneider, D.P., (1975) Astrophys. J., 201, p. 792
- Linnell, A.P., (1989) Space Science Rev., 50, p. 269
- Lucy, L.B., (1967) Z. Astrophys., 65, p. 89
- Mochnacki, S.W., (1981) Astrophys. J., 245, p. 650
- Mochnacki, S.W., (1984) Astrophys. J. Suppl. Ser., 55, p. 551
- Mochnacki, S.W., (1985) Astrophys. J. Suppl. Ser., 59, p. 445
- Popper, D.M., (1980) Ann. Rev. Astron. Astrophys., 18, p. 115
- Rafert, J.B., (1980) Astron. J., 100, p. 1253
- Rafert, J.B., Twigg, L.W., (1980) MNRAS, 193, p. 79
- Rafert, J.B., Markworth, N.L., (1986) Astron. J., 92, p. 678
- Rovithis-Livaniou, H., Rovithis, P., Bitzaraki, O., (1992) Astrophys. Sp. Science, 189, p. 237
- Ruciński, S.M., (1978) Nonstationary Evolution of Close Binaries, p. 117. , Ed. A.N. Żytkow, Polish Scientific Publishers, Warszawa
- Ruciński, S.M., (1993) P.A.S.P., 105, p. 1433
- Sarna, M.J., (1989) Astron. Astrophys., 224, p. 98
- Schmidt, E.G., (1992) IAU Inf. Bull. Var. Stars, 3733
- Twigg, L.W., (1979) MNRAS, 189, p. 907
- Twigg, L.W., Rafert, J.B., (1980) MNRAS, 193, p. 775
- Van Hamme, W., (1982) Astron. Astrophys., 116, p. 27
- Van Hamme, W., (1993) Astron. J., 106, p. 2096
- Wilson, R.E., (1979) Astrophys. J., 234, p. 1054
- Wilson, R.E., (1988) Critical Observations Versus Physical Models for Close Binary Stars, p. 193. , Ed. K-C. Leung, Gordon and Beach Science Publishers
- Wilson, R.E., (1990) Astrophys. J., 356, p. 613
- Wilson, R.E., Biermann, P., (1976) Astron. Astrophys., 48, p. 349
- Wilson, R.E., Devinney, E.J., (1971) Astrophys. J., 166, p. 605
Citas:
---------- APA ----------
(1999) . Differential corrections analysis of the UBV observations of LT Pavonis. Acta Astronomica, 45(2), 399-418.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00015237_v45_n2_p399_Cerruti [ ]
---------- CHICAGO ----------
Cerruti, M.A. "Differential corrections analysis of the UBV observations of LT Pavonis" . Acta Astronomica 45, no. 2 (1999) : 399-418.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00015237_v45_n2_p399_Cerruti [ ]
---------- MLA ----------
Cerruti, M.A. "Differential corrections analysis of the UBV observations of LT Pavonis" . Acta Astronomica, vol. 45, no. 2, 1999, pp. 399-418.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00015237_v45_n2_p399_Cerruti [ ]
---------- VANCOUVER ----------
Cerruti, M.A. Differential corrections analysis of the UBV observations of LT Pavonis. Acta Astron. 1999;45(2):399-418.Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00015237_v45_n2_p399_Cerruti [ ]
