Search Results - "Guzik, Joyce A."

Variable Blue Straggler Stars in the Open Cluster NGC 6819 Observed in the Kepler “Superstamp” Field by Guzik, Joyce A., Baran, Andrzej S., Sanjayan, Sachu, Németh, Péter, Hedlund, Anne M., Jackiewicz, Jason, Dauelsberg, Lori R.

“…Abstract NGC 6819 is an open cluster of age 2.4 Gyr that was in the NASA Kepler spacecraft’s field of view from 2009 to 2013. The central part of the cluster…”
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A New Asteroseismic Kepler Benchmark Constrains the Onset of Weakened Magnetic Braking in Mature Sun-like Stars by Bhalotia, Vanshree, Huber, Daniel, van Saders, Jennifer L., Metcalfe, Travis S., Stassun, Keivan G., White, Timothy R., Aguirre Børsen-Koch, Víctor, Ball, Warrick H., Basu, Sarbani, Serenelli, Aldo M., Sawczynec, Erica, Guzik, Joyce A., Howard, Andrew W., Isaacson, Howard

“…Abstract Stellar spin down is a critical yet poorly understood component of stellar evolution. In particular, results from the Kepler Mission imply that mature…”
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An Expanded Set of Los Alamos OPLIB Tables in MESA: Type-1 Rosseland-mean Opacities and Solar Models by Farag, Ebraheem, Fontes, Christopher J., Timmes, F. X., Bellinger, Earl P., Guzik, Joyce A., Bauer, Evan B., Wood, Suzannah R., Mussack, Katie, Hakel, Peter, Colgan, James, Kilcrease, David P., Sherrill, Manolo E., Raecke, Tryston C., Chidester, Morgan T.

“…Abstract We present a set of 1194 Type-1 Rosseland-mean opacity tables for four different metallicity mixtures. These new Los Alamos OPLIB atomic radiative…”
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Opacity Effects on Pulsations of Main-Sequence A-Type Stars by Guzik, Joyce, Fontes, Christopher, Fryer, Chris

“…Opacity enhancements for stellar interior conditions have been explored to explain observed pulsation frequencies and to extend the pulsation instability…”
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Core overshoot and convection in δ Scuti and γ Doradus stars by Lovekin, Catherine, Guzik, Joyce A.

“…The effects of rotation on pulsation in δ Scuti and γ Doradus stars are poorly understood. Stars in this mass range span the transition from convective…”
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Solar Models with Dynamic Screening and Early Mass Loss Tested by Helioseismic, Astrophysical, and Planetary Constraints by Wood, Suzannah R., Mussack, Katie, Guzik, Joyce A.

“…The faint young Sun paradox remains an open question. Presented here is one possible solution to this apparent inconsistency, a more massive early Sun. Based…”
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Revisiting the δ Scuti star FG Virginis using Kepler K2 and TESS data by Guzik, Joyce A., Jackiewicz, Jason, Hedlund, Anne M.

“…FG Virginis is a δ Scuti variable star that was the target of several ground-based multisite photometric campaigns from 1992 to 2004. Over 75 pulsation…”
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Can Enhanced Diffusion Improve Helioseismic Agreement for Solar Models with Revised Abundances? by Guzik, Joyce A, Watson, L. Scott, Cox, Arthur N

“…Recent solar photospheric abundance analyses (by Asplund et al. and Lodders) revise the C, N, O, Ne, and Ar abundances downward by 0.15-0.2 dex compared to…”
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Driving the Gravity-Mode Pulsations in γ Doradus Variables by Guzik, Joyce A, Kaye, Anthony B, Bradley, Paul A, Cox, Arthur N, Neuforge, Corinne

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A Theoretical γ Doradus Instability Strip by Warner, Phillip B, Kaye, Anthony B, Guzik, Joyce A

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Theoretical Prediction of an Observed Solar g-Mode by Cox, Arthur N, Guzik, Joyce A

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A Pilot Project to Manage Kepler-Derived Data in a Digital Object Repository by Miller, Laniece E., Powell, James E., Guzik, Joyce A., Bradley, Paul A., Miles, Lillian F.

“…Staff at the Research Library at Los Alamos National Laboratory (LANL) worked with LANL astrophysicists to archive data derived from Kepler Mission…”
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Seismological Comparisons of Solar Models with Element Diffusion Using the MHD, Opal, and Sireff Equations of State by Guzik, Joyce A, Swenson, Fritz J

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Light WIMPs in the Sun: Constraints from helioseismology by Cumberbatch, Daniel T., Guzik, Joyce. A., Silk, Joseph, Watson, L. Scott, West, Stephen M.

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Asteroseismology of the Multiply Periodic δ Scuti Star θ Tucanae by Templeton, Matthew R, Bradley, Paul A, Guzik, Joyce A

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Kepler Asteroseismology Program: Introduction and First Results by Gilliland, Ronald L., Brown, Timothy M., Christensen-Dalsgaard, Jørgen, Kjeldsen, Hans, Aerts, Conny, Appourchaux, Thierry, Basu, Sarbani, Bedding, Timothy R., Chaplin, William J., Cunha, Margarida S., De Cat, Peter, De Ridder, Joris, Guzik, Joyce A., Handler, Gerald, Kawaler, Steven, Kiss, László, Kolenberg, Katrien, Kurtz, Donald W., Metcalfe, Travis S., Monteiro, Mario J. P. F. G., Szabó, Robert, Arentoft, Torben, Balona, Luis, Debosscher, Jonas, Elsworth, Yvonne P., Quirion, Pierre-Olivier, Stello, Dennis, Suárez, Juan Carlos, Borucki, William J., Jenkins, Jon M., Koch, David, Kondo, Yoji, Latham, David W., Rowe, Jason F., Steffen, Jason H.

“…Asteroseismology involves probing the interiors of stars and quantifying their global properties, such as radius and age, through observations of normal modes…”
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Standard and Non-Standard Solar Models by Guzik, Joyce A, Neuforge-Verheecke, Corinne, Young, ACody, Epstein, Richard I, Poulin, Francis M, Schissel, Jason R

“…We summarize the physical input and assumptions commonly adopted in modern standard solar models that also produce good agreement with solar oscillation…”
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Deneb and the alpha Cygni Variables by Guzik, Joyce A, Kloppenborg, Brian, Jackiewicz, Jason

“…Deneb, the prototype alpha Cygni variable, is a blue-white supergiant that shows irregular variability with quasi-period around 12 days in brightness and…”
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Light WIMPs in the Sun: Constraints from Helioseismology by Cumberbatch, Daniel T, Guzik, Joyce. A, Silk, Joseph, Watson, L. Scott, West, Stephen M

“…Phys.Rev.D82:103503,2010 We calculate solar models including dark matter (DM) weakly-interacting massive particles (WIMPs) of mass 5-50 GeV and test these…”
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Abrupt Periodic Pulsation Resumptions in Deneb by Guzik, Joyce A, Abt, Helmut A, Jackiewicz, Jason, Kloppenborg, Brian

“…Deneb (alpha Cygni) is a bright (V magnitude 1.25) blue-white supergiant (spectral type A2 Ia) which shows variability in both radial velocity and photometric…”
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