M75, a globular cluster with a trimodal horizontal branch.: II.: <i>BV</i> photometry of the RR lyrae variables

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dc.contributor.authorCorwin, TM
dc.contributor.authorCatelan, M
dc.contributor.authorSmith, HA
dc.contributor.authorBorissova, J
dc.contributor.authorFerraro, FR
dc.contributor.authorRaburn, WS
dc.date.accessioned2025-01-21T01:09:23Z
dc.date.available2025-01-21T01:09:23Z
dc.date.issued2003
dc.description.abstractWe present new BV CCD photometry, light curves, and ephemerides for nine previously known, 29 newly detected RR Lyrae variables, and one newly detected variable of an unknown type in the globular cluster M75. The photometry used for the detection of the additional variables was obtained with the image subtraction package ISIS. The data were acquired on an observing run in 1999 July and range over seven observing nights. Estimates of fundamental photometric parameters are presented including intensity- and magnitude-averaged B and V magnitudes, magnitude-averaged colors, pulsation periods, and pulsation amplitudes. The mean period of the RRab variables, [P-ab] = 0.5868 days, and the number fraction of RRc stars, N-c/N-RR = 0.342, are both large for an Oosterho. type I (OoI) globular cluster, suggesting that M75 may be Oosterhoff-intermediate. Possible conflicts between Oosterhoff-type determination based on the A(V)-log P and A(B)-log P diagrams are discussed. The physical parameters of the RRc and RRab variables, as obtained from Fourier decomposition of their light curves, do not show any clear deviation from normal OoI behavior.
dc.fuente.origenWOS
dc.identifier.eissn1538-3881
dc.identifier.issn0004-6256
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96578
dc.identifier.wosidWOS:000182371800020
dc.issue.numero5
dc.language.isoen
dc.pagina.final2558
dc.pagina.inicio2543
dc.revistaAstronomical journal
dc.rightsacceso restringido
dc.subjectglobular clusters : individual (M75, NGC 6864)
dc.subjectRR Lyrae variable
dc.subjectstars : horizontal-branch
dc.titleM75, a globular cluster with a trimodal horizontal branch.: II.: <i>BV</i> photometry of the RR lyrae variables
dc.typeartículo
dc.volumen125
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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