The radii and temperatures of classical Cepheids

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

52

Cepheid Variables, Radii, Stellar Structure, Stellar Temperature, Brightness, Colorimetry, Distance, Radial Velocity, Stellar Evolution, Stellar Luminosity, Stellar Mass

Scientific paper

Radius and temperature determinations of classical Cepheids have been assembled from the literature and plotted along with theoretical relationships in (log P, log R)- and (log P, log Te)-diagrams. Different methods of radius determination give significantly different results. At shorter periods, the slope in the (log P, log R)-diagram is probably either 0.7 or 1.0. Arguments are presented for both interpretations, but the former value seems the more likely. In either case there are probably substantial systematic errors in many Wesselink determinations. From the temperatures it is seen that, for periods less than 12 days, the observed and theoretical blue edges agree quite well, but for longer periods the observed blue edge is cooler and has a steeper slope. This discrepancy, also observed in the Small Magellanic Cloud, cannot be removed by using any of the alternative temperature calibrations in the literature. Beat Cepheids are not confined to either the red or the blue edge of the instability strip.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

The radii and temperatures of classical Cepheids 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 The radii and temperatures of classical Cepheids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The radii and temperatures of classical Cepheids will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1379211

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.