Praesepe members light curves : J/MNRAS/442/2081

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Authors : Kovacs G. orcid , Hartman J.D., Bakos G.A. (hide) , Hartman J.D., Bakos G.A. et..al

VizieR DOI : 10.26093/cds/vizier.74422081
Bibcode : 2014MNRAS.442.2081K (ADS) (Simbad) (Objects)
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CDS Keywords : Clusters, open; Photometry, SDSS
UAT : Open star clusters, Optical astronomy, Sloan photometry

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Inserted into VizieR : 10-Jul-2014
Last modification : 09-Aug-2024

Stellar rotational periods in the planet hosting open cluster Praesepe. (2014)

Keywords : planetary systems - stars rotation - starspots - stars: variables: delta Scuti - open clusters and associations: individual: Praesepe

Abstract:By using the dense coverage of the extrasolar planet survey project HATNet (Hungarian-made Automated Telescope Network), we Fourier analyse 381 high-probability members of the nearby open cluster Praesepe (Beehive/M44/NGC 2632). In addition to the detection of 10 variables (of delta Scuti and other types), we identify 180 rotational variables (including the two known planet hosts). This sample increases the number of known rotational variables in this cluster for spectral classes earlier than M by more than a factor of 3. These stars closely follow a colour/magnitude - period relation from early F to late K stars. We approximate this relation by polynomials for an easier reference to the rotational characteristics in different ...(more)
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Monthly Notices policies
Light curves used in the time series analysis of Praesepe are presented. There are 381 light curves on instrumental Sloan r' magnitude scale with the zero points determined by the 2MASS magnitudes according to Eq. (1) of the paper. We present two types of magnitudes: a) external parameter decorrelated (EPD) and b), the ones obtained after the application of a trend filtering algorithm (TFA) on the EPD time series. These two methods are briefly described in the paper and in detail in the references therein. Here we just note that both methods are intended to filter out systematics due to environmental effects (instrumental, weather, etc.). For TFA filtering we used 600 templates and did not apply signal reconstruction.
Geza Kovacs, kovacs(at)konkoly.hu

                


                

                    

                


                

                    

                


                

                    
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