The Optical Gravitational Lensing Experiment. Catalog of RR Lyr Stars from the Small Magellanic Cloud

• Autorzy: Soszyński I. , Udalski A. , Szymański M. , Kubiak M. , Pietrzyński G. , Woźniak P. , Żebruń K. , Szewczyk O. , Wyrzykowski Ł.
• Języki publikacji: EN

Abstrakty

EN

We present the catalog of RR Lyrae stars from 2.4 square degrees of central parts of the Small Magellanic Cloud (SMC). The photometric data were collected during four years of the OGLE-II microlensing survey. Photometry of each star was obtained using the Difference Image Analysis (DIA) method. The catalog contains 571 objects, including 458 RRab, 56 RRc variables, and 57 double mode RR Lyr stars (RRd). Additionally we attach a list of variables with periods between 0.18-0.26 days, which are probably δ Sct stars. Period, BVI photometry, astrometry, amplitude, and parameters of the Fourier decomposition of the I-band light curve are provided for each object. We also present the Petersen diagram for double mode pulsators. We found that the SMC RR Lyr stars are fairly uniformly distributed over the studied area, with no clear correlation to any location. The most preferred periods for RRab and RRc stars are 0.589 and 0.357 days, respectively. We noticed significant excess of stars with periods of about 0.29 days, which might be second-overtone RR Lyr stars (RRe). The mean extinction free magnitudes derived for RRab stars are 18.97, 19.45 and 19.73 mag for the I, V and B-band, respectively. All presented data, including individual BVI observations, are available from the OGLE Internet archive.

Słowa kluczowe

EN

stars: variables: RR Lyr; Magellanic Clouds; catalogs

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2002
• Tom: Vol. 52, No. 4
• Strony: 369--396
• Opis fizyczny: Bibliogr. 37 poz., rys., tab., wykr.

Twórcy

autor

Soszyński I.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
• Princeton University Observatory, Princeton, NJ 08544-1001 USA

autor

Udalski A.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland

autor

Szymański M.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland

autor

Kubiak M.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland

autor

Pietrzyński G.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
• Universidad de Concepción, Departamento de Fisica, Casilla 160-C, Concepción, Chile

autor

Woźniak P.

• Los Alamos National Laboratory, MS-D436, Los Alamos, NM 87545 USA

autor

Żebruń K.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland

autor

Szewczyk O.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland

autor

Wyrzykowski Ł.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland

Bibliografia

• Alard, C., and Lupton, R.H. 1998, Astrophys. J., 503, 325.
• Alard, C. 2000, Astron. Astrophys. Suppl. Ser., 144, 363.
• Alcock, C., et al. (MACHO team) 1993, Nature, 365, 621.
• Alcock, C., et al. (MACHO team) 1996, Astron. J., 111, 1146.
• Aubourg, E., et al. (EROS team) 1993, Nature, 365, 623.
• Baade, W. 1952, Trans. IAU, 8, 397.
• Bono, G., Caputo, F., Castellani, V., and Marconi, M. 1997, Astron. Astrophys. Suppl. Ser., 121, 327.
• Clement, C., et al. 2001, Astron. J., 122, 2587.
• Dziembowski, W., and Cassisi, S. 1999, Acta Astron., 49, 371.
• Graham, J.A. 1975, P.A.S.P., 87, 641.
• Kovács, G., et al. 2000, in: IAU Colloq. 176, “The Impact of Large-Scale Surveys on Pulsating Star Resaerch”, Ed. L. Szabados and D.W. Kurtz, ASP Conference Series, Vol. 203, 313.
• Kovács, G., and Walker, A.R. 2001, Astron. Astrophys., 371, 579.
• Moskalik, P. 2000, in: IAU Colloq. 176, “The Impact of Large-Scale Surveys on Pulsating Star Resaerch”, Ed. L. Szabados and D.W. Kurtz, ASP Conference Series, Vol. 203, 135.
• Olech, A., et al. 1999, Astron. J., 118, 442.
• Olszewski, E.W., Schommer, R.A., and Aaronson, M. 1987, Astron. J., 93, 565.
• Paczyński, B. 2000, P.A.S.P., 112, 1281.
• Pietrzyński, G., Udalski, A., Kubiak, M., Szymański, M., Woźniak, P., and Żebruń, K. 1998, Acta Astron., 48, 175.
• Popielski, B.L., Dziembowski, W.A., and Cassisi, S. 2000, Acta Astron., 50, 491.
• Roberts, D.H., Lehár, J., and Dreher, J.W. 1987, Astron. J., 93, 968.
• Schechter, P.L., Saha, K., and Mateo, M. 1993, P.A.S.P., 105, 1342.
• Schlegel, D.J., Finkbeiner, D.P., and Davis, M. 1998, Astrophys. J., 500, 525.
• Schwarzenberg-Czerny, A. 1989, MNRAS, 241, 153.
• Sharpee, B., Stark, M., Pritzl, B., Smith, H., Silbermann, N., Wilhelm, R., and Walker, A. 2002, Astron. J., 124, 2341.
• Smith, H.A., Silbermann, N.A., Baird, S.R., and Graham, J.A. 1992, Astron. J., 104, 1430.
• Stellingwerf, R.F., Gauchy, A., and Dickens, R.J. 1987, Astrophys. J., 313, L75.
• Stryker, L.L., Da Costa, G.S., and Mould, J.R. 1985, Astrophys. J., 298, 544.
• Thackeray, A.D. 1951, The Observatory, 71, 219.
• Udalski, A., Kubiak, M., and Szymański, M. 1997, Acta Astron., 47, 319.
• Udalski, A., Szymański, M., Kubiak, M., Pietrzyński, G., Woźniak, P., and Żebruń, K. 1998a, Acta Astron., 48, 147.
• Udalski, A., Soszyński, I., Szymański, M., Kubiak, M., Pietrzyński, G., Woźniak, P., and Żebruń, K. 1998b, Acta Astron., 48, 563.
• Udalski, A., Soszyński, I., Szymański, M., Kubiak, M., Pietrzyński, G., Woźniak, P., and Żebruń, K. 1999, Acta Astron., 49, 437.
• van Albada, T.S., and Baker, N.H. 1973, Astrophys. J., 185, 477.
• Walker, A. 1989, P.A.S.P., 101, 570.
• Walker, A.R., and Nemec J.M. 1986, Astron. J., 112, 2026.
• Woźniak, P. R. 2000, Acta Astron., 50, 421.
• Żebruń, K., Soszyński, I., and Woźniak, P.R. 2001, Acta Astron., 51, 303.
• Żebruń, K., Soszyński, I., Woźniak, P., Udalski, A., Kubiak, M., Szymański, M., Pietrzyński, G., Szewczyk, O., and Wyrzykowski, Ł. 2001, Acta Astron., 51, 317.