Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/995
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dc.contributor.authorLazaro, C-
dc.contributor.authorArellano Ferro, A-
dc.contributor.authorArevalo, M. J-
dc.contributor.authorBramich, D. M-
dc.contributor.authorGiridhar, S-
dc.contributor.authorPoretti, E-
dc.date.accessioned2006-06-13T11:19:42Z-
dc.date.available2006-06-13T11:19:42Z-
dc.date.issued2006-10-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, Vol. 372, No. 1, pp. 69–80en
dc.identifier.urihttp://hdl.handle.net/2248/995-
dc.descriptionRestricted Access-
dc.description.abstractWe report the results of CCD V and R photometry of the RR Lyrae stars in M2. The periodicities of most variables are revised and new ephemerides are calculated. Light curve decomposition of the RR Lyrae stars was carried out and the corresponding mean physical parameters [Fe/H]= -1.49, T/subeff/ = 6237 K, log L = 1.62 L and Mv = 0.72 for RRab and [Fe/H] = -1.57, M = 0.65 M, T/subeff/ = 7271 K, log L = 1.73 L and Mv = 0.73 for RRc stars were calculated. A comparison of the radii obtained from the above luminosity and temperature with predicted radii from nonlinear convective models is discussed. The estimated mean distance to the cluster is 10:6 plus or minus 0:3 kpc. These results place M2 correctly in the general globular cluster sequences Oosterhoff type, mass, luminosity and temperature, all as a function of the metallicity. Mean relationships for M, log L/L, T/subeee/ and Mv as a funtion of [Fe/H] for a family of globular clusters are offered. These trends are consistent with evolutionary and structural notions on the horizontal branch. Eight new variables are reported.en
dc.format.extent945705 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherWiley-Blackwell-
dc.rights© Wiley-Blackwell-
dc.subjectGlobular clustersen
dc.subjectM2-Variable Starsen
dc.subjectRR Lyraeen
dc.subjectBlazhko effecten
dc.titleCCD Photometry of the globular cluster M2. RR Lyrae physical parameters and new variablesen
dc.typeArticleen
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