BV light curves of 11 RR Lyrae : J/AJ/139/2014

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Authors : Kinman T.D. orcid , Brown W.R. (hide) , Brown W.R. et..al

VizieR DOI : 10.26093/cds/vizier.51392014
Bibcode : 2010AJ....139.2014K (ADS) (Simbad) (Objects)
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CDS Keywords : Stars, variable; Photometry, CCD; Photometry, UBV
UAT : Variable stars, CCD photometry, Optical astronomy, Broad band photometry

Observation (OC)

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Inserted into VizieR : 17-Jun-2012
Last modification : 04-Jul-2017

Low-amplitude variables distinguishing RR Lyrae stars from eclipsing binaries. (2010)

Keywords : Galaxy halo - Galaxy: structure - stars: horizontal-branch - stars: individual (RR Lyrae)

Abstract:It is not easy to identify and classify low-amplitude variables, but it is important that the classification is done correctly. We use photometry and spectroscopy to classify low-amplitude variables in a 246deg^2^ part of the Akerlof et al. (2000, Cat. J/AJ/119/1901) field. Akerlof and Collaborators found that 38% of the RR Lyrae stars in their 2000deg^2^ test field were RR1 (type c). This suggests that these RR Lyrae stars belong to an Oosterhoff Type II population, while their period distribution is primarily Oosterhoff Type I. Our observations support their RR0 (type ab) classifications; however, six of the seven stars that they classified as RR1 (type c) are eclipsing binaries. Our classifications are supported by spectroscopic metallicities, ...(more)
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American Astronomical Society policies
We first observed the variables in Table 2 on 9 nights of a 12 night run with the 42 inch John S. Hall telescope of the Lowell Observatory using the Kron aperture photometer and a thermoelectrically cooled EMI 6256 photomultiplier. Landolt standards (Landolt 1992) were observed nightly so that the V and (B-V) are on the Johnson system. We obtained further photometric observations between 2004 and 2009 using the commercial robotic f/7 0.8m Ritchey-Chretien telescope of the Tenagra Observatory in Arizona. The photoelectric data of 2002 are given in Table 3 and the Tenagra photometric data are given in Table 4.

  • B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2012)

                


                

                    

                


                

                    

                


                

                    
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