Spectrophotometric parallax for U Geminorum

Journal Article · Sun Apr 01 04:00:00 EST 1979 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/112450· OSTI ID:6465449

Wade, R A

Spectrophotometry of U Geminorum from lambda3200 to lambda10 900 shows an upturn in flux for wavelengths longward of lambda6000. The energy distribution can be interpreted as the sum of fluxes from an M4.5 or M5 star and a source giving a flat continuum. The presence of an M star is confirmed by a higher-resolution spectrum in the red and near infrared and by the work of Stauffer, Spinrad, and Thorstensen. The M companion is less dense than a main-sequence star of the same color index. The absolute photometry allows a distance modulus of 4.4 +- 0.4 mag to be derived for U Geminorum. The absolute visual magnitude of the quiescent system at orbital phase 0.08 is M/sub V/=10.3 +- 0.8.

• Research Organization: Hale Observatories, California Institute of Technology, Pasadena, California 91125
• OSTI ID: 6465449
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 84:4; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BINARY STARS
DATA
DATA FORMS
DISTANCE
DWARF STARS
EMISSION SPECTRA
ERUPTIVE VARIABLE STARS
EXPERIMENTAL DATA
INFORMATION
ISOLATED VALUES
MAIN SEQUENCE STARS
MASS TRANSFER
NOVAE
NUMERICAL DATA
RED DWARF STARS
SPECTRA
SPECTROPHOTOMETRY
STAR EVOLUTION
STARS
VARIABLE STARS