BF
B. Freytag
astro-ph.SRastro-phastro-ph.IMastro-ph.GAastro-ph.EPphysics.flu-dyn
On Valency
published · living versionsW_fqtqk7qp·v1 · currentpublished
Spectroscopic properties of a two-dimensional time-dependent Cepheid model I. Description and validation of the model
with V. Vasilyev, H. -G. Ludwig, B. Lemasle, M. Marconi
1 version
Preprints & journals
84 papers in the corpus · 1998–2026VLTI-GRAVITY measurements of cool evolved stars: II. Pulsation properties and mass-loss process of the Mira star R Car and the red supergiant VX Sgr2604.21621v2 · D. Jadlovsk'y, M. Wittkowski, A. Chiavassa et al.2026 · 1 citationA&A, 711, A259 (2026)
Multi-mode Pulsations in AGB Stars: Insights from 3D RHD CO5BOLD Simulations2502.11978v3 · Arief Ahmad, Bernd Freytag, Susanne Hofner2025 · 5 citationsA&A 699, A148 (2025)
Dimming events of evolved stars due to clouds of molecular gas. Scenarios based on 3D radiation-hydrodynamics simulations with CO5BOLD2411.17561v1 · Bernd Freytag, Susanne Hofner, Bernhard Aringer et al.2024 · 0 citationsarXiv
Retrieving stellar parameters and dynamics of AGB stars with Gaia parallax measurements and CO5BOLD RHD simulations2409.03422v1 · E. B'eguin, A. Chiavassa, A. Ahmad et al.2024 · 5 citationsarXiv
Asymmetries in asymptotic giant branch stars and their winds. I. From 3D RHD models to synthetic observables2407.17317v1 · Joachim Wiegert, Bernd Freytag, Susanne Hofner2024 · 4 citationsA&A 690, A162 (2024)
A new dimension in the variability of AGB stars: convection patterns size changes with pulsation2405.10164v1 · A. Rosales-Guzm'an, J. Sanchez-Bermudez, C. Paladini et al.2024 · 9 citationsA&A 688, A124 (2024)
Is Betelgeuse Really Rotating? Synthetic ALMA Observations of Large-scale Convection in 3D Simulations of Red Supergiants2311.16885v2 · Jing-Ze Ma, Andrea Chiavassa, Selma E. de Mink et al.2023 · 24 citationsApJL 962 L36 (2024)
Global 3D radiation-hydrodynamical models of AGB stars with dust-driven winds2301.11836v1 · Bernd Freytag, Susanne Hofner2023 · 49 citationsA&A, Volume 669, 2023, A155
Properties of self-excited pulsations in 3D simulations of AGB stars and red supergiants2211.07682v2 · Arief Ahmad, Bernd Freytag, Susanne Hofner2022 · 25 citationsA&A 669, A49 (2023)
Probing Red Supergiant dynamics through photo-center displacements measured by Gaia2205.05156v1 · A. Chiavassa, R. Kudritzki, B. Davies et al.2022 · 24 citationsAstronomy and Astrophysics, Volume 661, L1, May 2022
Explaining the winds of AGB stars: Recent progress2204.09728v1 · Susanne Hofner, Bernd Freytag2022 · 10 citationsarXiv
The extended atmosphere and circumstellar environment of the cool evolved star VX Sagittarii as seen by MATISSE2112.10695v1 · A. Chiavassa, K. Kravchenko, M. Montarges et al.2021 · 12 citationsA&A 658, A185 (2022)
Atmosphere of Betelgeuse before and during the Great Dimming event revealed by tomography2104.08105v1 · K. Kravchenko, A. Jorissen, S. Van Eck et al.2021 · 45 citationsA&A 650, L17 (2021)
Spatially resolved spectroscopy across stellar surfaces. V. Observational prospects: Toward Earth-like exoplanet detection2103.04996v1 · Dainis Dravins (Lund), Hans-Gunter Ludwig (Heidelberg), Bernd Freytag (Uppsala)2021 · 19 citationsA&A 649, A17 (2021)
Spatially resolved spectroscopy across stellar surfaces. IV. F, G, & K-stars: Synthetic 3D spectra at hyper-high resolution2103.03880v1 · Dainis Dravins (Lund), Hans-Gunter Ludwig (Heidelberg), Bernd Freytag (Uppsala)2021 · 15 citationsA&A 649, A16 (2021)
Horizontal spreading of planetary debris accreted by white dwarfs2102.09564v1 · Tim Cunningham, Pier-Emmanuel Tremblay, Evan B. Bauer et al.2021 · 49 citationsarXiv
3D spectroscopic analysis of helium-line white dwarfs2011.12693v1 · Elena Cukanovaite, Pier-Emmanuel Tremblay, Pierre Bergeron et al.2020 · 43 citationsarXiv
Tomography of cool giant and supergiant star atmospheres III. Validation of the method on VLTI/AMBER observations of the Mira star S Ori2009.03955v1 · Kateryna Kravchenko, Markus Wittkowski, Alain Jorissen et al.2020 · 9 citationsA&A 642, A235 (2020)
Optical interferometry and Gaia measurement uncertainties reveal the physics of asymptotic giant branch stars2006.07318v1 · A. Chiavassa, K. Kravchenko, F. Millour et al.2020 · 18 citationsA&A 640, A23 (2020)
VLTI-PIONIER imaging of the red supergiant V602 Carinae2002.09243v1 · J. B. Climent, M. Wittkowski, A. Chiavassa et al.2020 · 12 citationsA&A 635, A160 (2020)
Tomography of cool giant and supergiant star atmospheres II. Signature of convection in the atmosphere of the red supergiant star Cep1910.04657v1 · K. Kravchenko, A. Chiavassa, S. Van Eck et al.2019 · 37 citationsA&A 632, A28 (2019)
Calibration of the mixing length theory for structures of helium-dominated atmosphere white dwarfs1909.10532v1 · Cukanovaite E., P.-E. Tremblay, B. Freytag et al.2019 · 35 citationsarXiv
Convective Overshoot and Macroscopic Diffusion in Pure-Hydrogen Atmosphere White Dwarfs1906.11252v1 · Tim Cunningham, Pier-Emmanuel Tremblay, Bernd Freytag et al.2019 · 67 citationsarXiv
Exploring the origin of clumpy dust clouds around cool giants. A global 3D RHD model of a dust-forming M-type AGB star1902.04074v1 · Susanne Hofner, Bernd Freytag2019 · 48 citationsA&A 623, A158 (2019)
Tomography of the red supergiant star {\mu} Cep1809.07581v1 · K. Kravchenko, A. Chiavassa, S. Van Eck et al.2018 · 0 citationsProc. IAU 14 (2018) 441-442
Pure-helium 3D model atmospheres of white dwarfs1809.00590v1 · E. Cukanovaite, P.-E. Tremblay, B. Freytag et al.2018 · 38 citationsarXiv
Atmospheres and wind properties of non-spherical AGB stars1808.05043v1 · S. Liljegren, S. Hofner, B. Freytag et al.2018 · 24 citationsA&A 619, A47 (2018)
Heading Gaia to measure atmospheric dynamics in AGB stars1808.02548v1 · A. Chiavassa, B. Freytag, M. Schultheis2018 · 54 citationsA&A 617, L1 (2018)
Large granulation cells on the surface of the giant star π1 Gruis.29258298 · Paladini, C, Baron, F, Jorissen, A et al.2018 · 72 citationsNature. 2018;553(7688):310-312
Using the CIFIST grid of CO5BOLD 3D model atmospheres to study the effects of stellar granulation on photometric colours. I. Grids of 3D corrections in the UBVRI, 2MASS, Hipparcos, Gaia, and SDSS systems1712.00024v2 · P. Bonifacio, E. Caffau, H.-G. Ludwig et al.2017 · 28 citationsA&A 611, A68 (2018)
Tomography of cool giant and supergiant star atmospheres. I. Validation of the method1711.08327v2 · K. Kravchenko, S. Van Eck, A. Chiavassa et al.2017 · 24 citationsA&A 610, A29 (2018)
Spectroscopic properties of a two-dimensional time-dependent Cepheid model II. Determination of stellar parameters and abundances1711.00236v2 · V. Vasilyev, H.-G. Ludwig, B. Freytag et al.2017 · 21 citationsA&A 611, A19 (2018)
Spectroscopic properties of a two-dimensional time-dependent Cepheid model I. Description and validation of the model1709.03905v1 · V. Vasilyev, H.-G. Ludwig, B. Freytag et al.2017 · 16 citationsA&A 606, A140 (2017)on Valency
Global 3D radiation-hydrodynamics models of AGB stars. Effects of convection and radial pulsations on atmospheric structures1702.05433v1 · Bernd Freytag, Sofie Liljegren, Susanne Hofner2017 · 127 citationsA&A 600, A137 (2017)
Non-magnetic photospheric bright points in 3D simulations of the solar atmosphere1612.04278v1 · Flavio Calvo, Oskar Steiner, Bernd Freytag et al.2016 · 17 citationsA&A, 596, A43 (2016)
Enhanced methods for computing spectra from CO5BOLD models using Linfor3D. Molecular bands in metal-poor stars1610.04427v1 · A. J. Gallagher, M. Steffen, E. Caffau et al.2016 · 1 citationarXiv
Application of a Theory and Simulation based Convective Boundary Mixing model for AGB Star Evolution and Nucleosynthesis1605.06159v1 · U. Battino, M. Pignatari, C. Ritter et al.2016 · 74 citationsarXiv
Near-infrared spectro-interferometry of Mira variables and comparisons to 1D dynamic model atmospheres and 3D convection simulations1601.02368v1 · M. Wittkowski, A. Chiavassa, B. Freytag et al.2016 · 34 citationsA&A 587, A12 (2016)
Pathways for Observing Stellar Surfaces Using 3D Hydrodynamical Simulations of Evolved Stars1512.03590v1 · A. Chiavassa, B. Freytag2015 · 0 citationsarXiv
On The Evolution of Magnetic White Dwarfs1509.05398v1 · P.-E. Tremblay, G. Fontaine, B. Freytag et al.2015 · 88 citationsarXiv
3D Model Atmospheres for Extremely Low-Mass White Dwarfs1507.01927v1 · P.-E. Tremblay, A. Gianninas, M. Kilic et al.2015 · 93 citationsarXiv
What causes the large extensions of red-supergiant atmospheres? Comparisons of interferometric observations with 1-D hydrostatic, 3-D convection, and 1-D pulsating model atmospheres1501.01560v1 · B. Arroyo-Torres, M. Wittkowski, A. Chiavassa et al.2015 · 73 citationsA&A 575, A50 (2015)
Calibration of the Mixing-Length Theory for Convective White Dwarf Envelopes1412.1789v1 · P.-E. Tremblay, H.-G. Ludwig, B. Freytag et al.2014 · 72 citationsarXiv
3D hydrodynamical simulations of evolved stars and observations of stellar surfaces1410.3868v1 · A. Chiavassa, B. Freytag2014 · 2 citationsarXiv
White Dwarfs In The UKIRT Infrared Deep Sky Survey Data Release 91405.0266v1 · P.-E. Tremblay, S. K. Leggett, N. Lodieu et al.2014 · 8 citationsarXiv
Weather on the Nearest Brown Dwarfs: Resolved Simultaneous Multi-Wavelength Variability Monitoring of WISE J104915.57-531906.1AB1310.5144v1 · Beth A. Biller, Ian J.M. Crossfield, Luigi Mancini et al.2013 · 95 citationsarXiv
Spectroscopic analysis of DA white dwarfs with 3D model atmospheres1309.0886v1 · P.-E. Tremblay, H.-G. Ludwig, M. Steffen et al.2013 · 220 citationsarXiv
Granulation properties of giants, dwarfs, and white dwarfs from the CIFIST 3D model atmosphere grid1307.2810v1 · P.-E. Tremblay, H.-G. Ludwig, B. Freytag et al.2013 · 69 citationsarXiv
Oxygen spectral line synthesis: 3D non-LTE with CO5BOLD hydrodynamical model atmospheres1303.2016v1 · D. Prakapavicius, M. Steffen, A. Kucinskas et al.2013 · 3 citationsarXiv
Progress in Modeling Very Low Mass Stars, Brown Dwarfs, and Planetary Mass Objects1302.6559v2 · F. Allard, D. Homeier, B. Freytag et al.2013 · 52 citationsarXiv
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