The absolute magnitude of RR Lyraes and the distance to the Galactic Centre

Details The absolute magnitude of RR Lyraes and the distance to the Galactic Centre The absolute magnitude of RR Lyraes and the distance to the Galactic Centre

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.226..927f&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 226, June 15, 1987, p. 927-942.

Astronomy and Astrophysics

Astronomy

30

Galactic Nuclei, Milky Way Galaxy, Star Clusters, Stellar Magnitude, Stellar Spectrophotometry, Variable Stars, Infrared Spectra, Interstellar Extinction, Metallicity, Stellar Luminosity

Scientific paper

The RR Lyrae absolute magnitude scale is discussed and evidence from the different methods of evaluating it is assembled. There is good agreement between the different methods that, at intermediate metallicities [Fe/H = -1.0], >MV< = 0.64±0.1, however, there is considerable disagreement about the slope of the absolute magnitude-metallicity relation. Depending on the true value of this slope the range of RR Lyraes absolute magnitudes may be as much as 0.7 mag. Arguments are presented to show that, in the infrared, the effects of metallicity on the absolute magnitude are considerably reduced and that, at these wavelengths, RR Lyraes should obey a simple period-luminosity relation. New H-band photometry of 70 RR Lyraes in Plaut's Field 3 Low (l = 0, b = -12) is presented. Using these data, plus the new period-luminosity relation the authors find R0 = 8.0 kpc with a total uncertainty of ±0.65 kpc. Because this distance was obtained using infrared data it is virtually independent of errors in the interstellar absorption.

Affiliated with

Also associated with

No associations

Rating

The absolute magnitude of RR Lyraes and the distance to the Galactic Centre 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 magnitude of RR Lyraes and the distance to the Galactic Centre, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The absolute magnitude of RR Lyraes and the distance to the Galactic Centre will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1818557