Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-10-06
Astronomy and Astrophysics
Astrophysics
Invited talk presented at the conference "Stellar Pulsation and Evolution" at Monte Porzio Catone, June 2005. To appear in Mem
Scientific paper
A number of recent technical developments, including the Hipparcos satellite, the Hubble Space Telescope fine guidance sensors and long base line near-IR interferometry has made it possible to employ several largely geometrical methods to determine direct distances to RR Lyrae stars and Cepheids. The distance scale now rests on a much firmer basis and the significant differences between the distances based on RR Lyrae stars (short) and Cepheids (long) to the LMC have been largely eliminated. The effects of metalicity on the RR Lyrae period-luminosity (PL) relation in the K-band as well as on the Cepheid PL relation appears to be the main remaining issues but even here empirical results are beginning to show convergence. I review here some of these recent developments seen from the perspective of the near-IR surface brightness method.
No associations
LandOfFree
How good are RR Lyrae and Cepheids really as Distance Indicators? The observational approach 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 How good are RR Lyrae and Cepheids really as Distance Indicators? The observational approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and How good are RR Lyrae and Cepheids really as Distance Indicators? The observational approach will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-323532