DECam Survey of Scorpius Centaurus : J/MNRAS/484/5049

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Authors : Moolekamp F.E. orcid , Mamajek E.E., James D.J. (hide) , Mamajek E.E., James D.J. et..al

VizieR DOI : 10.26093/cds/vizier.74845049
Bibcode : 2019MNRAS.484.5049M (ADS) (Simbad) (Objects)
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CDS Keywords : Stars, M-type; Stars, masses; Photometry, ugriz
UAT : M stars, Stellar masses, Infrared photometry, Optical astronomy, Broad band photometry

Observation (OC)

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Inserted into VizieR : 29-Dec-2020
Last modification : 19-Aug-2024

DECam survey for low-mass stars and substellar objects in the UCL and LCC subgroups of the Sco-Cen OB Association (SCOCENSUS). (2019)

Keywords : techniques image processing - techniques: photometric - proper motions - (stars:) brown dwarfs - stars: luminosity function, mass function

Abstract:Using images taken with the Dark Energy Camera (DECam), the first extensive survey of low mass and substellar objects is made in the ~15-20Myr Upper Centaurus Lupus (UCL) and Lower Centaurus Crux (LCC) subgroups of the Scorpius-Centaurus OB Association (Sco-Cen). Due to the size of our data set (>2Tb), we developed an extensive open source set of python libraries to reduce our images, including astrometry, coaddition, and PSF photometry. Our survey consists of 29x3deg^2^ fields in the UCL and LCC subgroups of Sco-Cen and the creation of a catalogue with over 11 million point sources. We create a prioritized list of UCL and LCC candidate members, with 118 best and another 348 good candidates. We show that the luminosity and mass ...(more)
Abstract: (hide)
Monthly Notices policies
Photometric and estimated properties of M and L dwarfs in the UCL and LCC subgroups of Scorpius Centaurus. izY magnitudes are PSF magnitudes made on DECam images and calibrated using SDSS reference fields. ID's for all cross-matched objects in external catalogs (2MASS, AllWISE, etc) are also given, as entries in those catalogs were used to estimate the proper motions of our stellar and substellar candidates as described in the paper. Some fields were observed multiple times with DECam, in which case we list proper motions estimated using decam observations only, in addition to proper motions using our DECam observations and reference catalogs. Using the Baraffe et al. (2015A&A...577A..42B) models combined with our photometric measurements we estimated mass, Teff, age, spectral type, atmospheric extinction, and distance to each object. The tables also includes flags used for processing, including a confidence estimate as described in the paper. Some starts were saturated in the 200s exposures, so shorter 7s exposures were used and sources with entries from the short exposures are marked with a "shortexp" column name.
Frea Moolekamp, fred.moolekamp(at)gmail.com

                


                

                    

                


                

                    

                


                

                    
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