The absolute magnitudes of RR Lyraes from HIPPARCOS parallaxes and proper motions

Details The absolute magnitudes of RR Lyraes from HIPPARCOS parallaxes and proper motions The absolute magnitudes of RR Lyraes from HIPPARCOS parallaxes and proper motions

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...330..515f&link_type=abstract

Astronomy and Astrophysics, v.330, p.515-520 (1998)

Astronomy and Astrophysics

Astrophysics

119

Stars: Variables: Rr Lyraes, Galaxy: Globular Clusters, Galaxies: Magellanic Clouds

Scientific paper

We have used HIPPARCOS proper motions and the method of Statistical Parallax to estimate the absolute magnitude of RR Lyrae stars. In addition we used the HIPPARCOS parallax of RR Lyrae itself to determine it's absolute magnitude. These two results are in excellent agreement with each other and give a zero-point for the RR Lyrae M_v,[Fe/H] relation of 0.77+/-0.15 at [Fe/H]=-1.53. This zero-point is in good agreement with that obtained recently by several groups using Baade-Wesselink methods which, averaged over the results from the different groups, gives M_v = 0.73+/-0.14 at [Fe/H]=-1.53. Taking the HIPPARCOS based zero-point and a value of 0.18+/-0.03 for the slope of the M_v,[Fe/H] relation from the literature we find firstly, the distance modulus of the LMC is 18.26+/-0.15 and secondly, the mean age of the Globular Clusters is 17.4+/-3.0 GYrs. These values are compared with recent estimates based on other "standard candles" that have also been calibrated with HIPPARCOS data. It is clear that, in addition to astrophysical problems, there are also problems in the application of HIPPARCOS data that are not yet fully understood. Table 1, which contains the basic data for the RR Lyraes, is available only at CDS. It may be retrieved via anonymous FTP at cdsarc.u-strasbg.fr (130.79.128.5) or via the Web at http://cdsweb.u-strasbg.fr/Abstract.html

Affiliated with

Also associated with

No associations

Rating

The absolute magnitudes of RR Lyraes from HIPPARCOS parallaxes and proper motions 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 absolute magnitudes of RR Lyraes from HIPPARCOS parallaxes and proper motions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The absolute magnitudes of RR Lyraes from HIPPARCOS parallaxes and proper motions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1221126