VI photometry and spectroscopy in h+{chi} Per : J/ApJS/186/191

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Authors : Currie T. orcid , Hernandez J., Irwin J. (hide) , Hernandez J., Irwin J. et..al

VizieR DOI : 10.26093/cds/vizier.21860191
Bibcode : 2010ApJS..186..191C (ADS) (Simbad) (Objects)
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CDS Keywords : Associations, stellar; Photometry, VRI; Spectra, infrared Spectral types; Clusters, open
UAT : Stellar associations, Infrared photometry, Optical astronomy, Photometry, Open star clusters

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Inserted into VizieR : 25-May-2010
Last modification : 11-Jan-2018

The stellar population of h and {chi} Persei cluster properties, membership, and the intrinsic colors and temperatures of stars. (2010)

Keywords : open clusters and associations individual (NGC 869, NGC 884) stars: pre-main sequence

Abstract:From photometric observations of ~47000 stars and spectroscopy of ~11000 stars, we describe the first extensive study of the stellar population of the famous Double Cluster, h and {chi} Persei, down to subsolar masses. By analyzing optical spectra and optical/infrared photometry, we constrain the distance moduli (dM), reddening (E(B-V)), and ages for h Persei, {chi} Persei, and the low-density halo population surrounding both cluster cores. With the exception of mass and spatial distribution, the clusters are nearly identical in every measurable way. From these data, we establish the first spectroscopic and photometric membership lists of cluster stars down to early/mid M dwarfs. At minimum, there are ~5000 members within 10' ...(more)
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Optical VI photometry of h and {chi} Persei were taken with the Mosaic Imager at the 4m Mayall telescope at the Kitt Peak National Observatory on 2006 October 13-16 and 27-30. We acquired low-resolution optical spectroscopy of Two Micron All Sky Survey (2MASS)-detected stars within 1deg^2^ of the cluster centers. For faint stars, we used the multiobject, fiber-fed spectrograph Hectospec on the 6.5m MMT. Brighter stars were observed with the fiber-fed spectrograph Hydra on the 3.5m WIYN telescope at Kitt Peak National Observatory and single-slit FAST spectrograph on the 1.5m Tillinghast telescope at the Fred Lawrence Whipple Observatory. 


                


                

                    

                


                

                    

                


                

                    
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