CCD photometry of the globular cluster M15: RR lyrae fourier decomposition and physical parameters
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Nacional Autónoma de México
2006
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| author | A. Arellano Ferro |
| author_facet | A. Arellano Ferro |
| contents | CCD photometry of the globular cluster M15: RR lyrae fourier decomposition and physical parameters A. Arellano Ferro G. García Lugo P. Rosenzweig Física, Astronomía y Matemáticas GLOBULAR CLUSTERS (M15) STARS: HORIZONTAL BRANCH STARS: VARIABLES: RR LYRAE Results of CCD photometry using V and R filters are reported for 33RR Lyrae stars in M15. The periodicities of some variables have been revised andnew ephemerides are given. The Blazhko effect, previously reported in V12, wasnot detected. Applying the approach of Fourier decomposition of the light curves,the physical parameters of the type RRab and RRc variables were estimated. Thecluster is Oosterhoff type II and the values for the iron content and distance are:[Fe/H]= 1:98 0:24 and d = 8:67 0:41 kpc, respectively. The mean values ofthe physical parameters determined for the RR Lyrae stars place the cluster pre-cisely into the sequences Oosterhoff type metallicity and metallicity effectivetemperature, valid for globular clusters. Evidences of evolution from the ZAHB arefound for the RRc but not for the RRab stars. 2006 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57142108 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.42 |
| format | Artículo científico |
| id | redalyc_57142108 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | CCD photometry of the globular cluster M15: RR lyrae fourier decomposition and physical parameters A. Arellano Ferro Física, Astronomía y Matemáticas GLOBULAR CLUSTERS (M15) STARS: HORIZONTAL BRANCH STARS: VARIABLES: RR LYRAE CCD photometry of the globular cluster M15: RR lyrae fourier decomposition and physical parameters A. Arellano Ferro G. García Lugo P. Rosenzweig Física, Astronomía y Matemáticas GLOBULAR CLUSTERS (M15) STARS: HORIZONTAL BRANCH STARS: VARIABLES: RR LYRAE Results of CCD photometry using V and R filters are reported for 33RR Lyrae stars in M15. The periodicities of some variables have been revised andnew ephemerides are given. The Blazhko effect, previously reported in V12, wasnot detected. Applying the approach of Fourier decomposition of the light curves,the physical parameters of the type RRab and RRc variables were estimated. Thecluster is Oosterhoff type II and the values for the iron content and distance are:[Fe/H]= 1:98 0:24 and d = 8:67 0:41 kpc, respectively. The mean values ofthe physical parameters determined for the RR Lyrae stars place the cluster pre-cisely into the sequences Oosterhoff type metallicity and metallicity effectivetemperature, valid for globular clusters. Evidences of evolution from the ZAHB arefound for the RRc but not for the RRab stars. 2006 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57142108 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.42 |
| title | CCD photometry of the globular cluster M15: RR lyrae fourier decomposition and physical parameters |
| topic | Física, Astronomía y Matemáticas GLOBULAR CLUSTERS (M15) STARS: HORIZONTAL BRANCH STARS: VARIABLES: RR LYRAE |
| url | https://www.redalyc.org/articulo.oa?id=57142108 |