Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apjs...55..289w&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 55, June 1984, p. 289-299.
Astronomy and Astrophysics
Astrophysics
45
Astronomical Catalogs, Stellar Parallax, Stellar Spectrophotometry, Calibrating, Dwarf Stars, Northern Sky, Stellar Color, Stellar Luminosity
Scientific paper
VRI photometry is presented for a sample of 413 stars selected from among the stars of color class m in the NLTT catalog for which no trigonometric parallaxes have been measured and which are not known to be on a trigonometric parallax program. Additional VRI photometry of stars with good trigonometric parallaxes provides the basis for the calibration of color/absolute-magnitude relations used to compute photometric parallaxes for the program stars, about 90 of which are found to have photometric parallax greater than or equal to 0.040 arscec. Attention is called to a few apparently subluminous stars of possible interest. On the basis of the present sample, it appears that the catalog color index m(pg)-m(R) will not be useful in identifying nearby stars from among the thousands of color-class-m stars with small proper motion in the NLTT catalog.
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