Abstract
view Abstract Citations (46) References (65) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS UBV photometry of RR Lyrae variables in the globular cluster NGC 6121 (M4). Cacciari, C. Abstract Photometry in U, B, and V is reported for 11 RR Lyrae variables and 11 horizontal branch stars in the globular cluster NGC 6121 (M4). The variables cover the whole range of periods present. From the present data and Sturch's (1977) observations of 15 ab-type RR Lyraes the reddening E B - V =0.36+0.02 mag and the metal abundance [Fe/H] = -1.0+0.4 are derived. Detailed comparisons are made with the results of pulsation theory and the following physical quantities for the variables in M4 are derived: Y = 0.28+0.05 and M = 0.6+0.1 M0 assuming that M =0.6+0.1 mag. Publication: The Astronomical Journal Pub Date: October 1979 DOI: 10.1086/112572 Bibcode: 1979AJ.....84.1542C Keywords: Cepheid Variables; Globular Clusters; Stellar Spectrophotometry; Ubv Spectra; Ultraviolet Photometry; Visual Photometry; Abundance; Helium; Interstellar Extinction; Metals; Stellar Luminosity; Stellar Mass; Tables (Data); Astronomy; Globular Clusters:Photometry; Globular Clusters:RR Lyrae Stars; Metal Abundances:RR Lyrae Stars; Pulsations:RR Lyrae Stars full text sources ADS | data products SIMBAD (32) GCPD (1)
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
