Fourier Coefficients of OGLE Variables. II. RR Lyraes

• Autorzy: Morgan S. M. , Simet M. , Bargenquast S.
• Języki publikacji: EN

Abstrakty

EN

Fourier coefficients for RR Lyraes in the OGLE survey are compared to the coefficients of field and cluster RR Lyraes. Based upon the location of the Bailey type ab and c stars for a range of metallicity, it appears that the vast majority of the OGLE variables have a [Fe/H] near -1.1. Using both empirical and theoretical relations for the Fourier coefficients, stellar characteristics are found to be similar to those derived in other RR Lyrae studies. There are also some stars in the OGLE sample which appear to be of a slightly different metal abundance, as well as some which are members of the Sagittarius dwarf galaxy. These latter stars do show a slight metal deficiency relative to most of the OGLE stars. The OGLE variables give a distance to the Galactic bulge of approximately 8 kpc, and a distance to the Sagittarius dwarf galaxy of about 25 kpc.

Słowa kluczowe

EN

stars: fundamental parameters; stars: oscillations

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 1998
• Tom: Vol. 48, No. 2
• Strony: 341--353
• Opis fizyczny: Bibliogr. 27 poz., tab., wykr.

Twórcy

autor

Morgan S. M.

• Department of Earth Science, University of Northern Iowa, CedarFalls, IA 50614-0335, USA

autor

Simet M.

• Department of Earth Science, University of Northern Iowa, CedarFalls, IA 50614-0335, USA

autor

Bargenquast S.

• Department of Earth Science, University of Northern Iowa, CedarFalls, IA 50614-0335, USA

Bibliografia

• Alcock, C., et al. 1997, Astrophys. J., 474, 217.
• Alcock, C., et al. 1998, Astrophys. J., 492, 190.
• Clement, C.M., Jankulak, M., and Simon, N.R. 1992, Astrophys. J., 395, 192.
• Clement, C. M., Ferance, S., and Simon, N. R. 1993, Astrophys. J., 412, 183.
• Hansen, L., and Petersen, J. O. 1991, Astron. Astrophys. Suppl. Ser., 88, 95.
• Harris, W.E. 1996, Astron. J., 112, 1487.
• Ibata, R.A., Gilmore, G., and Irwin, M.J. 1994, Nature, 370, 194.
• Jurcsik, J. and Kovács, G. 1996, Astron. Astrophys., 312, 111.
• Kovács, G., Shlosman, I., and Buchler, J.R. 1986, Astrophys. J., 307, 593.
• Kovács, G., and Jurcsik, J. 1996, Astrophys. J. Letters, 466, L17.
• Kovács, G., and Jurcsik, J. 1997, Astron. Astrophys., 322, 218.
• Marconi, G., Buonanno, R., Castellani, M., Iannicaola, G., Molaro, P., Pasquini, L., and Pulone, L. 1998, Astron. Astrophys., 330, 453.
• Mateo, M., Kubiak, M., Szymański, M., Kałużny, J., Krzemiński, W., and Udalski, A. 1995, Astron. J., 110, 1141.
• Morgan, S. M., Simet, M., and Bargenquast, S. 1998, Acta Astron., 48, 331.
• Olech, A. 1997, Acta Astron., 47, 183.
• Paczyński, B. and Stanek, K. 1998, Astrophys. J. Letters, 494, L219.
• Simon, N.R. 1988, Astrophys. J., 328, 747.
• Simon, N.R., and Clement, C.M. 1993, Astrophys. J., 410, 526.
• Simon, N.R., and Lee, A.S. 1981, Astrophys. J., 248, 291.
• Simon, N.R., and Teays, T.J. 1982, Astrophys. J., 261, 586.
• Udalski, A., et al. 1994, Acta Astron., 44, 317.
• Udalski, A., et al. 1995a, Acta Astron., 45, 1.
• Udalski, A., et al. 1995b, Acta Astron., 45, 433.
• Udalski, A., et al. 1996, Acta Astron., 46, 51.
• Udalski, A., et al. 1997, Acta Astron., 47, 1.
• Walker, A.R. 1994, Astron. J., 108, 555.
• Walker, A.R., and Terndrup, D.M. 1991, Astrophys. J., 378, 119.