Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...219..979d&link_type=abstract
Astrophysical Journal, Part 1, vol. 219, Feb. 1, 1978, p. 979-984.
Astronomy and Astrophysics
Astrophysics
30
Late Stars, Stellar Luminosity, Stellar Spectrophotometry, White Dwarf Stars, Black Body Radiation, Colorimetry, Parallax, Spectral Energy Distribution, Stellar Atmospheres, Stellar Motions
Scientific paper
Astrometric, photometric, and spectrophotometric observations establish the red proper-motion star LP 701-29 as the intrinsically faintest known degenerate star. Broad-band photometry yields V = 15.66, B-V = 1.88, and (V-I)KM = 1.07. A trigonometric parallax determination gives an absolute parallax of 0.123 min + or - 0.005 min corresponding to an absolute magnitude of 16.11 + or - 0.09. The extreme redness of the B-V color results from a heavily blanketed blue spectrum. Identifiable features include strong Ca I and probable Ca II and Na I. The spectrum is nearly featureless over the wavelength range 5000-7000 A and can be fitted by a blackbody with an effective temperature of 4200 K. The energy distribution is compared with that of VB 11, the previous intrinsically faintest known degenerate star.
Dahn Conard C.
Hintzen Paul M.
Liebert James W.
Spinrad Hyron
Stockman Hervey S.
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