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Title: 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 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.

Authors:
; ; ;  [1];  [2]
  1. Department of Physics and Astronomy, Texas A and M University, College Station, TX 77840 (United States)
  2. Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30302-4106 (United States)
Publication Date:
OSTI Identifier:
22342253
Resource Type:
Journal Article
Journal Name:
Astronomical Journal (New York, N.Y. Online)
Additional Journal Information:
Journal Volume: 148; Journal Issue: 4; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1538-3881
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BINARY STARS; CATALOGS; COLOR; DWARF STARS; GALAXIES; METALLICITY; PHOTOMETRY; PROPER MOTION; STARS

Citation Formats

Li, Ting, Marshall, Jennifer L., Williams, Patrick, Chavez, Joy, and Lépine, Sébastien. Optical BVRI photometry of common proper motion F/G/K+M wide separation binaries. United States: N. p., 2014. Web. doi:10.1088/0004-6256/148/4/60.
Li, Ting, Marshall, Jennifer L., Williams, Patrick, Chavez, Joy, & Lépine, Sébastien. Optical BVRI photometry of common proper motion F/G/K+M wide separation binaries. United States. https://doi.org/10.1088/0004-6256/148/4/60
Li, Ting, Marshall, Jennifer L., Williams, Patrick, Chavez, Joy, and Lépine, Sébastien. 2014. "Optical BVRI photometry of common proper motion F/G/K+M wide separation binaries". United States. https://doi.org/10.1088/0004-6256/148/4/60.
@article{osti_22342253,
title = {Optical BVRI photometry of common proper motion F/G/K+M wide separation binaries},
author = {Li, Ting and Marshall, Jennifer L. and Williams, Patrick and Chavez, Joy and Lépine, Sébastien},
abstractNote = {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 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.},
doi = {10.1088/0004-6256/148/4/60},
url = {https://www.osti.gov/biblio/22342253}, journal = {Astronomical Journal (New York, N.Y. Online)},
issn = {1538-3881},
number = 4,
volume = 148,
place = {United States},
year = {Wed Oct 01 00:00:00 EDT 2014},
month = {Wed Oct 01 00:00:00 EDT 2014}
}