Spots on the surface of Betelgeuse -- Results from new 3D stellar convection models

By Bernd Freytag, M. Steffen, B. Dorch. 2002

200 citations recorded by the source corpus.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Oceanography

View Paper: https://www.semanticscholar.org/paper/ef7bde9e7d76ac8382f846c4e546ca11bcbaf5ad

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Citations in the corpus

Three-dimensional hydrodynamical simulations of surface convection in red giant stars: impact on spectral line formation and abundance analysis (2007, background): “…convection have become feasible thanks to the advances in computer technology and the development of efficient numerical algorithms (e.g. Nordlund 1982; Nordlund & Dravins 1990; Stein & Nordlund 1998; Asplund et al. 1999; Freytag et al. 2002; Ludwig et al. 2002; Carlsson et al. 2004; Vögler 2004).”
The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not as Cool as We Thought (2005, unknown): “In addition, the velocities of the convective layers are nearly sonic, and even supersonic in the atmospheric layers, giving rise to shocks (Freytag et al. 2002).”
The metal–poor end of the Spite plateau: gravity sensitivity of the Hα wings fitting. (2009, unknown): “…et al. (2000) or Ali & Griem (1966) self-broadening theories (BA and ALI scales); H α ﬁtting against a 3D-hydrodynamical grid based on CO 5 BOLD models (Freytag et al. 2002; Wedemeyer et al. 2004) with Barklem et al. (2000) self-broadening (3D scale); InfraRed Flux method (IRFM, Gonz´alez…”
First stars XII. Abundances in extremely metal-poor turnoff stars,and comparison with the giants (2009, methodology): “To accomplish this, we used the two CO5BOLD (Freytag et al. 2002; Wedemeyer et al. 2004) 3D models described in Paper XI (Teff/log g/[Fe/H]: 6550/4.”
The elemental composition of the Sun: II. The iron group elements Sc to Ni (2014, methodology): “Caffau et al. (2011) analysed a set of Fe ii lines using a 3D solar model computed with the CO5BOLD code Freytag et al. (2002) and improved g f -values from Meléndez & Barbuy (2009), finding log Fe = 7.52 ± 0.06.”
SOLAR MODELS WITH ACCRETION. I. APPLICATION TO THE SOLAR ABUNDANCE PROBLEM (2011, methodology): “Based on 3D solar atmosphere models computed with the CO5BOLD code (Freytag et al. 2002), Caffau et al. (2010, and references there in) have derived best-value solar CNO abundances that are systematically higher than those in AGSS09 and associated uncertainties that are larger, so that the ranges…”
Solar Chemical Abundances Determined with a CO5BOLD 3D Model Atmosphere (2010, methodology): “…analyses of the solar photosphere are based on a time-dependent, 3D, hydrodynamical model atmosphere computed with the CO5BOLD code [http: SOLA: sunabbo_rev.tex; 4 March 2010; 21:37; p. 2 Solar Abundances //www.astro.uu.se/∼bf/co5bold 20020216/cobold.html] (Freytag, Steffen, and Dorch 2002, 2003).”
Non-equilibrium hydrogen ionization in 2D simulations of the solar atmosphere (2007, methodology): “It was earlier implemented in the code CO5BOLD (Freytag et al. 2002) to perform a 3D non-magnetic hydrodynamical simulation of the chromosphere by Leenaarts & Wedemeyer-Böhm (2006).”
Helioseismology and Solar Abundances (2007, methodology): “They used 3D models computed with CO5BOLD code (Freytag et al. 2002; Wedemeyer et al. 2004).”
Magnetic Field Generation in Fully Convective Rotating Spheres (2004, methodology): “By imposing fixed radial profile functions for surface cooling and velocity damping, we suppress the possibility of irregular surfaces that would develop, e.g. in red giants (Freytag et al. 2002), but this would not apply to real M dwarfs.”
The Effective Temperatures and Physical Properties of Magellanic Cloud Red Supergiants: The Effects of Metallicity (2006, background): “Radiative-hydrodynamic three-dimensional models of RSGs do show a pattern of large warm and cool patches on the surface (Freytag et al. 2002) that may explain this wavelength-dependent TeA.”
COMPREHENSIVE PHOTOMETRIC HISTORIES OF ALL KNOWN GALACTIC RECURRENT NOVAE (2009, background): “…Miras and non-pulsating stars) have ubiquitous power law PDS to very low frequencies (Kiss et al. 2006; Stello et al. 2008; Templeton & Karovska 2009) which is identified with the convection cells on the surface (Antia et al. 1984; Hayes 1984; Gray 2001; 2008; Bedding 2003; Freytag et al. 2002).”