view Abstract Citations (13) References (16) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The globular cluster NGC 6712. Frogel, J. A. Abstract New infrared photometry is presented for 15 red giants, including five variables, in the metal-rich globular cluster NGC 6712. From infrared color-magnitude diagrams a value of [Fe/H]IR = -0.92 is derived, identical to that for NGC 6171 and in close agreement with optical determinations of the abundance. Nonetheless, the CO indices of the NGC 6712 giants are quite strong - about 0.04 mag greater than for stars in 47 Tucanae. The long-period variable V7 is the only star in the cluster with a luminosity greater than that predicted for the location of core He flash. Two variables - V2 and V8 - are identified as being members of a class of variables characterized by blue colors and high temperatures relative to other giants of the same luminosity. Publication: The Astrophysical Journal Pub Date: April 1985 DOI: 10.1086/163098 Bibcode: 1985ApJ...291..581F Keywords: Abundance; Globular Clusters; Infrared Spectra; Red Giant Stars; Stellar Spectrophotometry; Variable Stars; Carbon Monoxide; Color-Magnitude Diagram; Helium; Stellar Luminosity; Astrophysics full text sources ADS | data products SIMBAD (13)