Astronomy and Astrophysics – Astronomy
Scientific paper
May 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89..702l&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 89, May 1984, p. 702-719.
Astronomy and Astrophysics
Astronomy
21
Astronomical Catalogs, Astronomical Photography, Stellar Motions, Stellar Spectra, Classifications, Northern Hemisphere, Spectrographs, Statistical Analysis, Stellar Parallax, Ultraviolet Astronomy
Scientific paper
Spectral types have been found for as many as possible of the approximately 9000 stars of high proper motion contained in the Lowell Observatory northern hemisphere proper-motion star survey. New spectral types have been determined for about 900 stars, mainly previously unclassified objects, from objective-prism plates already existing or specially obtained with the Burrell Schmidt of the Warner and Swasey Observatory. Classifications of about 80 stars of large tangential velocity were also made utilizing slit spectrograms taken with the 36-in. reflector. This work has enabled the writer to make a new calibration of Luyten's Mpg-vs-H (= m + 5 + 5 log μ) relation, and in particular to investigate its dependence on spectral type.
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