A redetermination of the luminosity, distance, and reddening of Beta Lyrae

Details A redetermination of the luminosity, distance, and reddening of Beta Lyrae A redetermination of the luminosity, distance, and reddening of Beta Lyrae

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90..773d&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, May 1985, p. 773-783.

Astronomy and Astrophysics

Astronomy

22

Distance, Eclipsing Binary Stars, Lyra Constellation, Red Shift, Stellar Luminosity, Stellar Magnitude, Giant Stars, Hertzsprung-Russell Diagram, Main Sequence Stars, Stellar Atmospheres, Stellar Evolution, Stellar Mass, Stellar Spectrophotometry, Stellar Temperature

Scientific paper

The authors have redetermined the distance to β Lyrae and found that it probably lies between 345 and 400 pc, with the most likely value being 370 pc. With the corresponding true distance modulus of 7.8 mag, they find that the eclipsing system of β Lyrae has a maximum absolute visual magnitude of -4.7 mag. Using Wilson's model, the authors conclude that the average absolute visual magnitude of the primary component is -4.1 mag, so that the star is best classified as B8.5 or B9 II-Ib. The visual absolute magnitude of the secondary component is -3.3 mag. The color excess is small, E(B-V) = 0.04 mag. These data are based on optical and IUE scans of the brightest visual companion to β Lyrae, HD 174664, and on an analysis of the hydrogen line profiles in its spectrum. The authors find that the star is mildly evolved within the main-sequence band. Its effective temperature (14250K) and surface gravity (log g ≅ 4.0) correspond most closely to those of stars classified as B6 V. This conclusion creates a certain evolutionary dilemma, since the age of HD 174664 should not exceed 20 - 30 million years if the basic model of β Lyrae as an Algol-type binary is correct while the authors' result is 48×106yr.

Affiliated with

Also associated with

No associations

Rating

A redetermination of the luminosity, distance, and reddening of Beta Lyrae does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A redetermination of the luminosity, distance, and reddening of Beta Lyrae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A redetermination of the luminosity, distance, and reddening of Beta Lyrae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1630639