J
Joyce A. Guzik
Researcher at Los Alamos National Laboratory
Publications - 183
Citations - 6928
Joyce A. Guzik is an academic researcher from Los Alamos National Laboratory. The author has contributed to research in topics: Stars & Asteroseismology. The author has an hindex of 38, co-authored 180 publications receiving 6416 citations. Previous affiliations of Joyce A. Guzik include Iowa State University & Kavli Institute for Theoretical Physics.
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Journal ArticleDOI
The Current State of Solar Modeling
Jørgen Christensen-Dalsgaard,Werner Däppen,S. V. Ajukov,E. Anderson,H. M. Antia,Sarbani Basu,V. A. Baturin,Gabrielle Berthomieu,Brian Chaboyer,S. M. Chitre,Arthur N. Cox,Pierre Demarque,J. Donatowicz,W. A. Dziembowski,M. Gabriel,Douglas Gough,David B. Guenther,Joyce A. Guzik,J. W. Harvey,Frank Hill,G. Houdek,Carlos A. Iglesias,Alexander G. Kosovichev,John Leibacher,Pierre Morel,C. R. Proffitt,Janine Provost,J. Reiter,Edward J. Rhodes,Forrest J. Rogers,Ian W. Roxburgh,Michael Thompson,Roger K. Ulrich +32 more
TL;DR: Data from the GONG project and other helioseismic experiments reveal subtle errors in the models, such as an excess in sound speed just beneath the convection zone, which is plausible that the sound-speed differences reflect weak mixing in stellar interiors.
Journal ArticleDOI
Kepler Asteroseismology Program: Introduction and First Results
Ronald L. Gilliland,Timothy M. Brown,Jørgen Christensen-Dalsgaard,Hans Kjeldsen,Conny Aerts,T. Appourchaux,Sarbani Basu,Timothy R. Bedding,William J. Chaplin,Margarida S. Cunha,Peter De Cat,Joris De Ridder,Joyce A. Guzik,Gerald Handler,Steven D. Kawaler,László L. Kiss,László L. Kiss,Katrien Kolenberg,D. W. Kurtz,Travis S. Metcalfe,Mário J. P. F. G. Monteiro,Róbert Szabó,Torben Arentoft,Luis A. Balona,Jonas Debosscher,Yvonne Elsworth,P.-O. Quirion,Dennis Stello,Juan Carlos Suárez,William J. Borucki,Jon M. Jenkins,David G. Koch,Yoji Kondo,David W. Latham,Jason F. Rowe,Jason H. Steffen +35 more
TL;DR: The first 43 days of the Kepler asteroseismology program were reported in this paper, showing that the unique capabilities of Kepler in providing a revolutionary advance in stellar astrophysics are already well in evidence.
Journal ArticleDOI
The Kepler characterization of the variability among A- and F-type stars I. General overview
K. Uytterhoeven,K. Uytterhoeven,K. Uytterhoeven,A. Moya,A. Grigahcène,Joyce A. Guzik,Juan Gutiérrez-Soto,Juan Gutiérrez-Soto,Juan Gutiérrez-Soto,Barry Smalley,Gerald Handler,Luis A. Balona,Ewa Niemczura,L. Fox Machado,Serena Benatti,E. Chapellier,Andrew Tkachenko,Róbert Szabó,Juan Carlos Suárez,Vincenzo Ripepi,Jose Antonio Pascual,P. Mathias,S. Martin-Ruiz,Holger Lehmann,Jason Jackiewicz,Saskia Hekker,Saskia Hekker,Michael Gruberbauer,Michael Gruberbauer,Rafael A. García,Xavier Dumusque,Xavier Dumusque,D. Díaz-Fraile,Paul A. Bradley,Victoria Antoci,Markus Roth,B. Leroy,Simon J. Murphy,P. De Cat,J. Cuypers,Hans Kjeldsen,Jørgen Christensen-Dalsgaard,Michel Breger,Michel Breger,Andrzej Pigulski,László L. Kiss,László L. Kiss,Martin Still,Susan E. Thompson,J. Van Cleve +49 more
TL;DR: In this article, the authors present a first general characterization of the pulsational behavior of A-F type stars as observed in the Kepler light curves of a sample of 750 candidate A-f type stars, and observationally investigate the relation between γ Doradus (γ Dor), δ Scuti (δ Sct), and hybrid stars.
Journal ArticleDOI
Driving the Gravity-Mode Pulsations in γ Doradus Variables
TL;DR: In this paper, the authors present the results of calculations that predict pulsation instability of high-order g-modes with periods between 0.4 and 3 days, as observed in these stars.
Journal ArticleDOI
A uniform asteroseismic analysis of 22 solar-type stars observed by Kepler
Savita Mathur,Travis S. Metcalfe,M. Woitaszek,Hans Bruntt,Graham A. Verner,Jørgen Christensen-Dalsgaard,Jørgen Christensen-Dalsgaard,O. L. Creevey,G. Doğan,G. Doğan,Sarbani Basu,Christoffer Karoff,Christoffer Karoff,Dennis Stello,T. Appourchaux,Tiago L. Campante,Tiago L. Campante,William J. Chaplin,Rafael A. García,Timothy R. Bedding,Othman Benomar,Alfio Bonanno,S. Deheuvels,Y. P. Elsworth,Patrick Gaulme,Joyce A. Guzik,Rasmus Handberg,Saskia Hekker,Saskia Hekker,W. Herzberg,Mário J. P. F. G. Monteiro,L. Piau,P.-O. Quirion,C. Régulo,C. Régulo,Markus Roth,David Salabert,Aldo Serenelli,Michael Thompson,Regner Trampedach,Timothy R. White,J. Ballot,I. M. Brandão,J. Molenda-Zakowicz,Hans Kjeldsen,Joseph D. Twicken,Kamal Uddin,Bill Wohler +47 more
TL;DR: In this paper, the authors performed a uniform analysis of 22 stars with the highest signal-to-noise ratio observed for 1 month each during the first year of the Kepler space telescope and quantified the precision and relative accuracy of asteroseismic determinations of the stellar radius, mass and age that are possible using various methods.