Three-dimensional interferometric, spectrometric, and planetary views of Procyon

Abstract

We used a new realistic 3D radiative-hydrodynamical model atmosphere of Procyon generated with the Stagger Code and synthetic spectra computed with the radiative transfer code Optim3D to re-analyze interferometric and spectroscopic data from the optical to the infrared of Procyon. We compute intensity maps in two optical filters centered at 500 and 800 nm (MARK III) and one infrared filter centered at 2200 nm (VINCI). We constructed stellar disk images accounting for the center-to-limb variations and used them to derive visibility amplitudes and closure phases. We provide 3D limb-darkening coefficients in the optical as well as in the infrared. We show that visibility curves and closure phases show clear deviations from circular symmetry from the 3rd lobe on. These deviations are detectable with current interferometers using closure phases. We derive new angular diameters at different wavelengths with two independent methods based on 3D simulations. We find a diameter_Vinci = 5.390 \pm 0.03 mas that this is confirmed by an independent asteroseismic estimation. The resulting Teff is 6591 K, which is consistent with the infrared flux method determinations. We find also a value of the surface gravity log g = 4.01 \pm 0.03 that is larger by 0.05 dex from literature values. Spectrophotometric comparisons with observations provide very good agreement with the spectral energy distribution and photometric colors, allowing us to conclude that the thermal gradient of the simulation matches fairly well Procyon. Finally, we show that the granulation pattern of a planet hosting Procyon-like star has a non-negligible impact on the detection of hot Jupiters in the infrared using interferometry closure phases. It is then crucial to have a comprehensive knowledge of the host star to directly detect and characterize hot Jupiters. In this respect, RHD simulations are very important to reach this aim.

Accepted for publication on Astronomy and Astrophysics, 14 pages, 12 figures

References in corpus (13)

• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• Simulations of stellar convection with CO5BOLD
• Theoretical Spectra and Light Curves of Close-in Extrasolar Giant Planets and Comparison with Data
• A multi-site campaign to measure solar-like oscillations in Procyon. I. Observations, Data Reduction and Slow Variations
• Tests of stellar model atmospheres by optical interferometry: VLTI/VINCI limb-darkening measurements of the M4 giant psi phe
• Searching for faint companions with VLTI/PIONIER. I. Method and first results
• Toward Direct Detection of Hot Jupiters with Precision Closure Phase: Calibration Studies and First Results from the CHARA Array
• The diameter of the CoRoT target HD 49933. Combining the 3D limb darkening, asteroseismology, and interferometry
• The StaggerGrid Project: a Grid of 3D Model Atmospheres for High-Precision Spectroscopy
• Asteroseismology of Procyon with SOPHIE
• Closure Phase Signatures of Planet Transit Events
• Seismic inference of differential rotation in Procyon A
• Prospects for near-infrared characterisation of hot Jupiters with VSI

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