Variable Stars in the Field of the Globular Cluster E3

• Autorzy: Mochejska B. J. , Kaluzny J. , Thompson I.
• Języki publikacji: EN

Abstrakty

EN

We present the results of a search for variable stars in the faint sparse globular cluster E3. We have found two variable stars: an SX Phe variable (V1) and a W UMa eclipsing binary (V2). We have applied period-luminosity and period-color-luminosity relations to the variables to obtain their distance moduli. V1 seems to be a blue straggler belonging to E3, based on its distance modulus and location in the CMD. V2 is probably located behind the cluster, in the Milky Way halo. We also present V/B-V and V/V-I color magnitude diagrams of E3.

Słowa kluczowe

EN

binaries: close; binaries: eclipsing; stars: variables: general; globular clusters: individual: E3

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2000
• Tom: Vol. 50, No. 1
• Strony: 105--111
• Opis fizyczny: Bibliogr. 17 poz., rys., tab., wykr.

Twórcy

autor

Mochejska B. J.

• Copernicus Astronomical Center, 00-716 Warszawa, Bartycka 18

autor

Kaluzny J.

• Copernicus Astronomical Center, 00-716 Warszawa, Bartycka 18

autor

Thompson I.

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

Bibliografia

• Alard, C. 1999, preprint (astro-ph/9903111).
• Alard, C., and Lupton, R.H. 1998, Astrophys. J., 503, 325.
• Frogel, J.A., and Twarog, B.A. 1983, Astrophys. J., 274, 270.
• Gratton, R.G., and Ortolani, S. 1987, Astron. Astrophys. Suppl. Ser., 67, 373.
• Harris, W.E. 1996, Astron. J., 112, 1487.
• Hesser,J.E., McClure, R.D., Hawarden, T.G., Cannon, R.D., von Rudloff, R., Kruger, B., and Egles, D. 1984, P.A.S.P., 96, 406.
• Kaluzny, J., Stanek, K.Z., Krockenberger, M., Sasselov, D.D., Tonry, J.L., and Mateo, M. 1998, Astron. J., 115, 1016.
• Landolt, A. 1992, Astron. J., 104, 340.
• Lauberts, A. 1976, Astron. Astrophys., 52, 309.
• McClure, R.D., Hesser, J.E., Stetson, P.B., and Stryker, L.L. 1985, P.A.S.P., 97, 665.
• McNamara, D.H. 1997, P.A.S.P., 109, 1221.
• Rucinski, S.M. 2000, preprint (astro-ph/0001152).
• Schlegel, D.J., Finkbeiner, D.P., and Davis, M. 1998, Astrophys. J., 500, 525.
• Schwarzenberg-Czerny, A. 1989, MNRAS, 253, 198.
• Stetson, P.B. 1987, P.A.S.P., 99, 191.
• van den Bergh, S., Demers, S., and Kunkel, W.E. 1980, Astrophys. J., 239, 112.
• Veronesi, C., Zaggia, S., Piotto, G., Ferraro, F.R., and Bellazzini, M. 1996, ASP Conference Series, 92, 301.