Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...276...87c&link_type=abstract
Astronomy and Astrophysics, Vol.276, NO. 1/SEPI, P. 87, 1993
Astronomy and Astrophysics
Astrophysics
10
Clusters: Globular, Stars: Rr Lyr, Stars: Mass Of
Scientific paper
The mass of RR Lyrae variables has been a controversial problem for about a decade, as the stellar evolution and pulsation theories predicted values in significant disagreement. An independent method for estimating physical parameters of type-c RR Lyrae stars such as mass, luminosity and temperature was found by Simon (1989, 1990a) and recently revised by Simon & Clement (t992a,b). This method makes use of the Fourier parameter 31 and we have applied it to a number of RRc stars in globular clusters of both Oosterhoff types, namely M3, MS, M62, NGC320l, NGC4147, NGC6t7t, M15, M53, M68 and NGC4833. The average values of mass we have found are M=0.60±0.16M and 0.67±0.19Msun, and the luminosities are logL = 1.685±0.021 and 1.768±0.022 for Oosterhoff type I and II clusters respectively. These results are discussed and compared with other determinations and the present requirements of the stellar evolution and pulsation theories. There is a strong indication for a brighter zero-point of the luminosity scale by approximately 0.2-0.3 mag with respect to the results of the Baade-Wesselink method applied to field RR Lyrae stars.
Bruzzi A.
Cacciari Carla
No associations
LandOfFree
On the Mass of Type-C Rr-Lyrae Variables in Globular Clusters 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 On the Mass of Type-C Rr-Lyrae Variables in Globular Clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Mass of Type-C Rr-Lyrae Variables in Globular Clusters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1558815