Broad-band photometric colors and effective temperature calibrations for late-type giants. I. Z=0.02

Abstract

We present new synthetic broad-band photometric colors for late-type giants based on synthetic spectra calculated with the PHOENIX model atmosphere code. The grid covers effective temperatures T_eff=3000...5000K, gravities log g=-0.5...+3.5, and metallicities [M/H]=+0.5...-4.0. We show that individual broad-band photometric colors are strongly affected by model parameters such as molecular opacities, gravity, microturbulent velocity, and stellar mass. Our exploratory 3D modeling of a prototypical late-type giant shows that convection has a noticeable effect on the photometric colors too, as it alters significantly both the vertical and horizontal thermal structures in the outer atmosphere. The differences between colors calculated with full 3D hydrodynamical and 1D model atmospheres are significant (e.g., Δ(V-K)~0.2 mag), translating into offsets in effective temperature of up to ~70K. For a sample of 74 late-type giants in the Solar neighborhood, with interferometric effective temperatures and broad-band photometry available in the literature, we compare observed colors with a new PHOENIX grid of synthetic photometric colors, as well as with photometric colors calculated with the MARCS and ATLAS model atmosphere codes. (abridged)

30 pages, 21 figures, A&A in press. Table 2 can be obtained from the CDS or directly from the authors

References in corpus (33)

• Evolutionary tracks and isochrones for low- and intermediate-mass stars: from 0.15 to 7 M_sun, and from Z=0.0004 to 0.03
• The NextGen Model Atmosphere grid for $3000\le \Teff \le 10000\K$
• The Limiting Effects of Dust in Brown Dwarf Model Atmospheres
• Towards Better Age Estimates for Stellar Populations: The Y^2 Isochrones for Solar Mixture
• A standard stellar library for evolutionary synthesis: I. Calibration of theoretical spectra
• The effective temperature scale of FGK stars. II. Teff : color : [Fe/H] calibrations
• A standard stellar library for evolutionary synthesis: II. The M dwarf extension
• The NextGen Model Atmosphere grid: II. Spherically symmetric model atmospheres for giant stars with effective temperatures between 3000 and 6800~K
• Model Atmospheres for M (Sub)Dwarfs: I. The base model grid
• Stellar Iron Abundances: non-LTE Effects
• A Globular Cluster Metallicity Scale Based on the Abundance of Fe II
• Galactic Globular Cluster Metallicity Scale from the Calcium Triplet. II. Rankings, Comparisons and Puzzles
• Numerical simulation of the three-dimensional structure and dynamics of the non-magnetic solar chromosphere
• Star-to-Star Abundance Variations among Bright Giants in the Mildly Metal-Poor Globular Cluster M4
• Improved Color-Temperature Relations and Bolometric Corrections for Cool Stars
• Parallel Implementation of the PHOENIX Generalized Stellar Atmosphere Program
• Galactic Globular Cluster Relative Ages. II
• The effective temperature scale of FGK stars. I. Determination of temperatures and angular diameters with the infrared flux method
• New Analyses of Star-to-Star Abundance Variations Among Bright Giants in the Mildly Metal-Poor Globular Cluster M5
• New grids of ATLAS9 atmospheres I: Influence of convection treatments on model structure and on observable quantities
• A Study of the B-V Colour Temperature Relation
• Models for Old, Metal-Poor Stars with Enhanced alpha-Element Abundances. III. Isochrones and Isochrone Population Functions
• Towards the absolute planes: a new calibration of the Bolometric Corrections and Temperature scales for Population II Giants
• Color transformations and bolometric corrections for Galactic halo stars: alpha-enhanced vs scaled-solar results
• Synthetic Spectra and Color-Temperature Relations of M Giants
• Broad-band photometric colors and effective temperature calibrations for late-type giants. I. Z=0.02
• Tests of stellar model atmospheres by optical interferometry: VLTI/VINCI limb-darkening measurements of the M4 giant psi phe
• Parallel Implementation of the PHOENIX Generalized Stellar Atmosphere Program. II: Wavelength Parallelization
• The Effects of Fe II NLTE on Nova Atmospheres and Spectra
• Ages and metallicities of star clusters: new calibrations and diagnostic diagrams from visible integrated spectra
• Analysis of Keck High Resolution Spectra of VB10
• Abundances in Stars from the Red Giant Branch Tip to the Near Main Sequence in M71: II. Iron Abundance
• Coupling emitted light and chemical yields from stars: a basic constraint to population synthesis models of galaxies

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