Optical BVRI Photometry of Common Proper Motion F/G/K+M Wide Separation Binaries

Abstract

We present optical (BVRI) photometric measurements of a sample of 76 common proper motion wide separation main sequence binary pairs. The pairs are composed of a F-, G-, or K-type primary star and an M-type secondary. The sample is selected from the revised NLTT catalog and the LSPM catalog. The photometry is generally precise to 0.03 mag in all bands. We separate our sample into two groups, dwarf candidates and subdwarf candidates, using the reduced proper motion (RPM) diagram constructed with our improved photometry. The M subdwarf candidates in general have larger $V-R$ colors than the M dwarf candidates at a given $V-I$ color. This is consistent with an average metallicity difference between the two groups, as predicted by the PHOENIX/BT-Settl models. The improved photometry will be used as input into a technique to determine the metallicities of the M-type stars.

arXiv comment26 pages, 8 figures, accepted for publication in AJ

References in corpus (21)

• The USNO-B Catalog
• A Catalog of Northern Stars With Annual Proper Motions Larger Than 0.15 Seconds of Arc (LSPM catalog - North)
• Metallicity and Temperature Indicators in M dwarf K band Spectra: Testing New & Updated Calibrations With Observations of 133 Solar Neighborhood M dwarfs
• M-Subdwarfs: Spectroscopic Classification and the Metallicity Scale
• A Spectroscopic Catalog of the Brightest (J<9) M Dwarfs in the Northern Sky
• Improved Astrometry and Photometry for the Luyten Catalog. II. Faint Stars and the Revised Catalog
• Near-infrared Metallicities, Radial Velocities and Spectral Types for 447 Nearby M Dwarfs
• Revised metallicity classes for low-mass stars: dwarfs (dM), subdwarfs (sdM), extreme subdwarfs (esdM), and ultra subdwarfs (usdM)
• Prospecting in late-type dwarfs: a calibration of infrared and visible spectroscopic metallicities of late-K and M dwarfs spanning 1.5 dex
• Disk and Halo Wide Binaries from the Revised Luyten Catalog: Probes of Star Formation and MACHO Dark Matter
• Galactic Stellar Populations in the Era of SDSS and Other Large Surveys
• Metallicity measurements using atomic lines in M and K dwarf stars
• Accurate M Dwarf Metallicities from Spectral Synthesis: A Critical Test of Model Atmospheres
• M-dwarf metallicities - A high-resolution spectroscopic study in the near infrared
• Calibrating M dwarf metallicities using molecular indices
• Nearby stars from the LSPM-north Proper Motion Catalog. I. Main Sequence Dwarfs and Giants Within 33 Parsecs of the Sun
• Twenty-three new ultra-cool subdwarfs from the Sloan Digital Sky Survey
• New High Proper Motion Stars from the Digitized Sky Survey. IV. Completion of the Southern Survey and 170 Additional Stars with pm>0.45 arcsec/yr
• Improved Astrometry and Photometry for the Luyten Catalog. I. Bright Stars
• Mapping the Local Halo: Statistical Parallax Analysis of SDSS Low-Mass Subdwarfs
• Finding Extreme Subdwarfs

Cited by in corpus (6)

• Wide Binaries in Tycho-{\it Gaia}: Search Method and the Distribution of Orbital Separations
• The First Tidally Disrupted Ultra-Faint Dwarf Galaxy? - Spectroscopic Analysis of the Tucana III Stream
• Reaching the boundary between stellar kinematic groups and very wide binaries. III. Sixteen new stars and eight new wide systems in the beta Pictoris moving group
• Wide Binaries in Tycho-Gaia II: Metallicities, Abundances, and Prospects for Chemical Tagging
• Overlooked wide companions of nearby F stars
• New nearby white dwarfs from Gaia DR1 TGAS and UCAC5/URAT