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Revised Baade–Wesselink Analysis of RR Lyrae Stars

Published online by Cambridge University Press:  12 April 2016

Carla Cacciari ,
Gisella Clementini1 ,
Fiorella Castelli  and
Fabrizio Melandri
Carla Cacciari
Affiliation:
Osservatorio Astronomico, Via Ranzani 1, I-40127 Bologna, Italy
Gisella Clementini1
Affiliation:
Osservatorio Astronomico, Via Ranzani 1, I-40127 Bologna, Italy
Fiorella Castelli
Affiliation:
Osservatorio Astronomico, Via Tiepolo 11, I-34131 Trieste, Italy
Fabrizio Melandri
Affiliation:
Dipartimento di Astronomia, Via Ranzani 1, I-40127 Bologna, Italy

Abstract

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We have applied the Baade–Wesselink method to two field RR Lyrae stars, i.e. SW And and RR Cet, and derived their distances and physical parameters. With respect to previous B–W analyses we have applied the following improvements: i) use of all sets of available data, after proper comparison for homogeneity and compatibility; ii) use of the most recent and accurate model atmospheres, with turbulent velocity Vturb = 4 km s−1 and the no-overshooting approximation, and comparison with other treatments of convection; iii) use of the instantaneous gravity along the pulsation cycle rather than the mean value; iv) comparison with modified radial velocity curves according to various assumptions on radial velocity gradients in the atmosphere; and v) careful reanalysis of the temperature scale. The main aim of this study is to evaluate the effect of the above items on the B–W results and verify whether any (or a combination) of them can possibly account for the discrepancy of the absolute magnitude zero-point with respect to other independent determinations.

Type
Part 3. Cepheids, RR Lyrae Stars, Distance Scales
Information
International Astronomical Union Colloquium , Volume 176: The Impact of Large-Scale Surveys on Pulsating Star Research , 2000 , pp. 176 - 181
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

Cacciari, C., Clementini, G., & Fernley, J. 1992, ApJ, 396, 219 CrossRefGoogle Scholar
Canuto, V. & Mazzitelli, I. 1992, ApJ, 389, 724 Google Scholar
Carretta, E., Gratton, R., Clementini, G., & Fusi Pecci, F. 1999, ApJ, submitted [astro-ph/9902086]Google Scholar
Castelli, F. 1999a, private communicationGoogle Scholar
Castelli, F. 1999b, A&A, 346, 564 Google Scholar
Chaboyer, B., Demarque, P., Kernan, P.J., & Krauss, L.M. 1998, ApJ, 494, 96 CrossRefGoogle Scholar
Chadid, M. & Gillet, D. 1998, A&A, 335, 255 Google Scholar
Chieffi, A., Limongi, M., & Straniero, O. 1998, private communicationGoogle Scholar
Cole, A.A. 1998, ApJ, 500, L137 Google Scholar
Dorman, B., Rood, R.T., & O’Connell, R. 1993, ApJ, 419, 596 Google Scholar
Feast, M.W. & Catchpole, R.M. 1997, MNRAS, 286, L1 CrossRefGoogle Scholar
Fernley, J. 1994, A&A, 284, L16 Google Scholar
Fernley, J., Carney, B.W., Skillen, I., Cacciari, C., & Janes, K. 1998, MNRAS, 293, L61 CrossRefGoogle Scholar
Ferrara, F.R., Messineo, M., Fusi Pecci, F., et al. 1999, AJ, in press [astro- ph/9906248]Google Scholar
Fuhrmann, K., Axer, M., & Gehren, T. 1993, A&A, 271, 451 Google Scholar
Gardiner, R.B., Kupka, F., & Smalley, B. 1999, A&A, 347, 876 Google Scholar
Gautschy, A. 1987, Vistas in Astron., 30, 197 Google Scholar
Gould, A. & Popowski, P. 1998, ApJ, 508, 844 Google Scholar
Gratton, R. 1998, MNRAS, 296, 739 CrossRefGoogle Scholar
Gratton, R., Fusi Pecci, F., Carretta, E., et al. 1997, ApJ, 491, 749 CrossRefGoogle Scholar
Grundahl, F., VandenBerg, D.A., & Andersen, M.I. 1998, ApJ, 500, L179 Google Scholar
Guinan, E.F., Fitzpatrick, E.L., Dewarf, L.E., et al. 1998, ApJ, 509, L21 CrossRefGoogle Scholar
Jones, R.V., Carney, B.W., Latham, D.W., & Kurucz, R.L. 1987, ApJ, 312, 254 CrossRefGoogle Scholar
Jones, R.V., Carney, B.W., Storm, J., & Latham, D.W. 1992, ApJ, 386, 646 CrossRefGoogle Scholar
Kovács, G. & Walker, A.R. 1998, ApJ, 512, 271 CrossRefGoogle Scholar
Kurucz, R.L. 1979, ApJS, 40, 1 Google Scholar
Kurucz, R.L. 1995, available at http://cfaku5.harvard.edu Google Scholar
Lee, M.G., Freedman, W.L., & Madore, B.F. 1993, ApJ, 417, 553 Google Scholar
Liu, T. & Janes, K.A. 1990, ApJ, 354, 273 CrossRefGoogle Scholar
Martin, J.C. & Morrison, H.L. 1998, AJ, 116, 1724 Google Scholar
Montegriffo, P., Ferrara, F.R., Origlia, L., & Fusi Pecci, F. 1998, MNRAS, 297, 872 Google Scholar
Oke, J.B., Giver, L.P., & Searle, L. 1962, ApJ, 136, 393 CrossRefGoogle Scholar
Panagia, N. 1998, Mem. S. A. It., 69, 225 Google Scholar
Pont, E., Mayor, M., Turon, C., & VandenBerg, D.A. 1998, A&A, 329, 87 Google Scholar
Reid, I.N. 1997, AJ, 114, 161 CrossRefGoogle Scholar
Sandage, A. 1993, AJ, 106, 703 CrossRefGoogle Scholar
Skillen, I., Fernley, J., Stobie, R.S., & Jameson, R.F. 1993, MNRAS, 265, 301 Google Scholar
Sweigart, A.W. 1997, ApJ, 474, L23 Google Scholar
Udalski, A., Pietrzynski, G., Wozniak, P., et al. 1998, ApJ, 509, L25 Google Scholar