WIYN Open Cluster Study LXII: Comparison of Isochrone Systems using Deep Multi-Band Photometry of M35

Abstract

Current generation stellar isochrone models exhibit non-negligible discrepancies due to variations in the input physics. The success of each model is determined by how well it fits the observations, and this paper aims to disentangle contributions from the various physical inputs. New deep, wide-field optical and near-infrared photometry ($UBVRIJH{K}_S$) of the cluster M35 is presented, against which several isochrone systems are compared: Padova, PARSEC, Dartmouth and Y${}^2$. Two different atmosphere models are applied to each isochrone: ATLAS9 and BT-Settl. For any isochrone set and atmosphere model, observed data are accurately reproduced for all stars more massive then $0.7$ M${}_{\odot }$. For stars less massive than 0.7 M${}_{\odot }$, Padova and PARSEC isochrones consistently produce higher temperatures than observed. Dartmouth and Y${}^2$ isochrones with BT-Settl atmospheres reproduce optical data accurately, however they appear too blue in IR colors. It is speculated that molecular contributions to stellar spectra in the near-infrared may not be fully explored, and that future study may reconcile these differences.

References in corpus (15)

• The chemical composition of the Sun
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• Low Temperature Opacities
• Theoretical isochrones in several photometric systems I. Johnson-Cousins-Glass, HST/WFPC2, HST/NICMOS, Washington, and ESO Imaging Survey filter sets
• Models of Stars, Brown Dwarfs and Exoplanets
• New catalogue of optically visible open clusters and candidates
• Solar Chemical Abundances Determined with a CO5BOLD 3D Model Atmosphere
• Towards Better Age Estimates for Stellar Populations: The Y^2 Isochrones for Solar Mixture
• A standard stellar library for evolutionary synthesis: II. The M dwarf extension
• The ACS Survey of Galactic Globular Clusters. II. Stellar Evolution Tracks, Isochrones, Luminosity Functions, and Synthetic Horizontal-Branch Models
• Low-temperature gas opacity - AESOPUS: a versatile and quick computational tool
• The CFHT Open Star Cluster Survey. IV. Two Rich, Young Open Star Clusters: NGC 2168 (M35) and NGC 2323 (M50)
• WIYN Open Cluster Study 5. Lithium Depletion and Metallicity in G and K Dwarfs of the Open Cluster M35
• WIYN Open Cluster Study XI: WIYN 3.5m Deep Photometry of M35 (NGC 2168)
• WIYN Open Cluster Study XVI: Optical/Infrared Photometry and Comparisons With Theoretical Isochrones

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