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Abstrakty
Fourier coefficients for δ Scuti from the OGLE dark matter survey of the Galactic bulge are compared to the coefficients of similar stars, mainly High Amplitude δ Scuti and SX Phe stars. While in previous studies there appears to be a division amongst the δ Scuti stars based upon the R21 parameter, such a division is not apparent in the OGLE stars. There does though appear to be a separation of the δ Scuti stars based upon the φ31 variable. This separation is not likely due to a metal variation and its cause is not known. Values for the extinction towards the Galactic bulge can be used to estimate a distance of approximately 7.6 kpc for the δ Scuti stars. One variable does appear to be located beyond the Galactic bulge at a distance of approximately 21 kpc.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
509--518
Opis fizyczny
Bibliogr. 20 poz., tab., wykr.
Twórcy
autor
- Department of Earth Science, University of Northern Iowa, Cedar Falls, IA 50614-0335, USA
autor
- Department of Earth Science, University of Northern Iowa, Cedar Falls, IA 50614-0335, USA
autor
- Department of Earth Science, University of Northern Iowa, Cedar Falls, IA 50614-0335, USA
Bibliografia
- Antonello, E., Broglia, P., Conconi, P., and Mantegazza, L. 1986, Astron. Astrophys., 169, 122.
- 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.
- Cox, A.N., McNamara, B.J., and Ryan, W. 1984, Astrophys. J., 284, 250.
- Ibata, R.A., Gilmore, G., and Irwin, M.J. 1994, Nature, 370, 194.
- 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.
- Morgan, S.M., Simet, M., and Bargenquast, S. 1998, Acta Astron., 48, 341.
- Petersen, J.O., and Høg, E. 1998, Astron. Astrophys., 331, 989.
- Poretti, E., and Antonello, E. 1988, Astron. Astrophys., 199, 191.
- Poretti, E., Antonello, E., and Le Borgne, J.F. 1990, Astron. Astrophys., 228, 350.
- 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 Moffett, T.J. 1985, P.A.S.P., 97, 1078.
- Stanek, K.Z. 1996, Astrophys. J. Letters, 460, L37.
- 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.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-d78087c5-b8ed-4f81-977f-6d7744f9e4cf