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3-D hydrodynamical model atmospheres: A tool to correct radial velocities and parallaxes for Gaia

Chiavassa, Andrea; Bigot, L; Thevenin, F; Collet, Remo; Jasniewicz, G; Magic, Zazralt; Asplund, Martin

Description

Convection plays an essential role in the emerging intensity for many stars that will be observed by Gaia. Convective-related surface structures affect the shape, shift, and asymmetry of absorption lines, the photocentric and photometric variability causing bias in Gaia measurements. Regarding the importance of Gaia mission and its goals, it is mandatory to have the best models of the observed stars. 3-D time-dependent hydrodynamical simulations of surface convection are crucial to model the...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Conference paper
URI: http://hdl.handle.net/1885/83070
Source: Journal of Physics: Conference Series 328
DOI: 10.1088/1742-6596/328/1/012012

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