Calibrating the surface brightness - color relation for late-type red giants stars in the visible domain using VEGA/CHARA interferometric observations
arXiv:2006.16609 · doi:10.1051/0004-6361/202037679
Abstract
The surface brightness - color relationship (SBCR) is a poweful tool for determining the angular diameter of stars from photometry. It was for instance used to derive the distance of eclipsing binaries in the Large Magellanic Cloud (LMC), which led to its distance determination with an accuracy of 1%. We calibrate the SBCR for red giant stars in the 2.1 < V-K < 2.5 color range using homogeneous VEGA/CHARA interferometric data secured in the visible domain, and compare it to the relation based on infrared interferometric observations, which were used to derive the distance to the LMC. Observations of eight G-K giants were obtained with the VEGA/CHARA instrument. The derived limb-darkened angular diameters were combined with a homogeneous set of infrared magnitudes in order to constrain the SBCR. The average precision we obtain on the limb-darkened angular diameters of the eight stars in our sample is 2.4%. For the four stars in common observed by both VEGA/CHARA and PIONIER/VLTI, we find a 1 sigma agreement for the angular diameters. The SBCR we obtain in the visible has a dispersion of 0.04 magnitude and is consistent with the one derived in the infrared (0.018 magnitude). The consistency of the infrared and visible angular diameters and SBCR reinforces the result of 1% precision and accuracy recently achieved on the distance of the LMC using the eclipsing-binary technique. It also indicates that it is possible to combine interferometric observations at different wavelengths when the SBCR is calibrated.
arXiv comment9 pages, in press in A&A revue
References in corpus (29)
- Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
- Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
- A 2.4% Determination of the Local Value of the Hubble Constant
- Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
- An eclipsing binary distance to the Large Magellanic Cloud accurate to 2 per cent
- A distance to the Large Magellanic Cloud that is precise to one per cent
- First Results from the CHARA Array. II. A Description of the Instrument
- The angular size of dwarf stars and subgiants - Surface brightness relations calibrated by interferometry
- Interstellar Extinction Law toward the Galactic Center III: J, H, Ks bands in the 2MASS and the MKO systems, and 3.6, 4.5, 5.8, 8.0 micron in the Spitzer/IRAC system
- PIONIER: a 4-telescope visitor instrument at VLTI
- 3D maps of the local ISM from inversion of individual color excess measurements
- The Palomar Testbed Interferometer
- Three-dimensional mapping of the local interstellar medium with composite data
- Vertical distribution of Galactic disk stars IV - AMR and AVR from clump giants
- SearchCal: a Virtual Observatory tool for searching calibrators in optical long baseline interferometry. I: The bright object case
- A Problem with the Clustering of Recent Measures of the Distance to the Large Magellanic Cloud
- Direct Distances to Cepheids in the Large Magellanic Cloud: Evidence for a Universal Slope of the Period-Luminosity Relation up to Solar Abundance
- Studying the Diversity of Type Ia Supernovae in the Ultraviolet: Comparing Models with Observations
- Data reduction methods for single-mode optical interferometry - Application to the VLTI two-telescopes beam combiner VINCI
- A new LMC K-band distance from precision measurements of nearby red clump stars
- Study of the impact of the post-MS evolution of the host star on the orbits of close-in planets. I. Sample definition and physical properties
- Spherically-symmetric model stellar atmospheres and limb darkening I: limb-darkening laws, gravity-darkening coefficients and angular diameter corrections for red giant stars
- Improving the surface brightness-color relation for early-type stars using optical interferometry
- Spherically symmetric model stellar atmospheres and limb darkening II: limb-darkening laws, gravity-darkening coefficients and angular diameter corrections for FGK dwarf stars
- Fundamental properties of red-clump stars from long-baseline H-band interferometry
- The Araucaria Project. Accurate stellar parameters and distance to evolved eclipsing binary ASAS J180057-2333.8 in Sagittarius Arm
- A Physically-Based Method for Scaling Cepheid Light Curves for Future Distance Determinations
- The operation of VEGA/CHARA : from the scientific idea to the final products
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