Search Results - "Ball, Warrick H."

Modules for Experiments in Stellar Astrophysics (MESA): Time-dependent Convection, Energy Conservation, Automatic Differentiation, and Infrastructure by Jermyn, Adam S., Bauer, Evan B., Schwab, Josiah, Farmer, R., Ball, Warrick H., Bellinger, Earl P., Dotter, Aaron, Joyce, Meridith, Marchant, Pablo, Mombarg, Joey S. G., Wolf, William M., Sunny Wong, Tin Long, Cinquegrana, Giulia C., Farrell, Eoin, Smolec, R., Thoul, Anne, Cantiello, Matteo, Herwig, Falk, Toloza, Odette, Bildsten, Lars, Townsend, Richard H. D., Timmes, F. X.

“…Abstract We update the capabilities of the open-knowledge software instrument Modules for Experiments in Stellar Astrophysics ( MESA ). The new auto _ diff…”
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aims – a new tool for stellar parameter determinations using asteroseismic constraints by Rendle, Ben M, Buldgen, Gaël, Miglio, Andrea, Reese, Daniel, Noels, Arlette, Davies, Guy R, Campante, Tiago L, Chaplin, William J, Lund, Mikkel N, Kuszlewicz, James S, Scott, Laura J A, Scuflaire, Richard, Ball, Warrick H, Smetana, Jiri, Nsamba, Benard

“…A key aspect in the determination of stellar properties is the comparison of observational constraints with predictions from stellar models. Asteroseismic…”
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Standing on the Shoulders of Dwarfs: the Kepler Asteroseismic LEGACY Sample. I. Oscillation Mode Parameters by Lund, Mikkel N., Aguirre, Víctor Silva, Davies, Guy R., Chaplin, William J., Christensen-Dalsgaard, Jørgen, Houdek, Günter, White, Timothy R., Bedding, Timothy R., Ball, Warrick H., Huber, Daniel, Antia, H. M., Lebreton, Yveline, Latham, David W., Handberg, Rasmus, Verma, Kuldeep, Basu, Sarbani, Casagrande, Luca, Justesen, Anders B., Kjeldsen, Hans, Mosumgaard, Jakob R.

“…The advent of space-based missions like Kepler has revolutionized the study of solar-type stars, particularly through the measurement and modeling of their…”
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Solar Evolution Models with a Central Black Hole by Bellinger, Earl P., Caplan, Matt E., Ryu, Taeho, Bollimpalli, Deepika, Ball, Warrick H., Kühnel, Florian, Farmer, R., de Mink, S. E., Christensen-Dalsgaard, Jørgen

“…Abstract Hawking proposed that the Sun may harbor a primordial black hole (BH) whose accretion supplies some of the solar luminosity. Such an object would have…”
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Stellar Cruise Control: Weakened Magnetic Braking Leads to Sustained Rapid Rotation of Old Stars by Saunders, Nicholas, van Saders, Jennifer L., Lyttle, Alexander J., Metcalfe, Travis S., Li, Tanda, Davies, Guy R., Hall, Oliver J., Ball, Warrick H., Townsend, Richard, Creevey, Orlagh, Dodds, Curt

“…Abstract Despite a growing sample of precisely measured stellar rotation periods and ages, the strength of magnetic braking and the degree of departure from…”
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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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Surface effects in solar-like oscillators by Ball, Warrick H.

“…Inaccurate modelling of the near-surface layers of solar models causes a systematic difference between modelled and observed solar mode frequencies. This…”
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Quasi-stars, giants and the Schönberg-Chandrasekhar limit by Ball, Warrick H., Tout, Christopher A., Żytkow, Anna N.

“…The Schönberg-Chandrasekhar (SC) limit is a well-established result in the understanding of stellar evolution. It provides an estimate of the point at which an…”
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Model-independent Measurement of Internal Stellar Structure in 16 Cygni A and B by Bellinger, Earl P., Basu, Sarbani, Hekker, Saskia, Ball, Warrick H.

“…We present a method for measuring internal stellar structure based on asteroseismology that we call "inversions for agreement." The method accounts for…”
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FUNDAMENTAL PARAMETERS OF MAIN-SEQUENCE STARS IN AN INSTANT WITH MACHINE LEARNING by Bellinger, Earl P., Angelou, George C., Hekker, Saskia, Basu, Sarbani, Ball, Warrick H., Guggenberger, Elisabeth

“…ABSTRACT Owing to the remarkable photometric precision of space observatories like Kepler, stellar and planetary systems beyond our own are now being…”
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Modelling Kepler red giants in eclipsing binaries: calibrating the mixing-length parameter with asteroseismology by Li, Tanda, Bedding, Timothy R, Huber, Daniel, Ball, Warrick H, Stello, Dennis, Murphy, Simon J, Bland-Hawthorn, Joss

“…Abstract Stellar models rely on a number of free parameters. High-quality observations of eclipsing binary stars observed by Kepler offer a great opportunity…”
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Standing on the Shoulders of Dwarfs: the Kepler Asteroseismic LEGACY Sample. II. Radii, Masses, and Ages by Aguirre, Víctor Silva, Lund, Mikkel N., Antia, H. M., Ball, Warrick H., Basu, Sarbani, Christensen-Dalsgaard, Jørgen, Lebreton, Yveline, Reese, Daniel R., Verma, Kuldeep, Casagrande, Luca, Justesen, Anders B., Mosumgaard, Jakob R., Chaplin, William J., Bedding, Timothy R., Davies, Guy R., Handberg, Rasmus, Houdek, Günter, Huber, Daniel, Kjeldsen, Hans, Latham, David W., White, Timothy R., Coelho, Hugo R., Miglio, Andrea, Rendle, Ben

“…We use asteroseismic data from the Kepler satellite to determine fundamental stellar properties of the 66 main-sequence targets observed for at least one full…”
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Asteroseismic Inference of the Central Structure in a Subgiant Star by Bellinger, Earl P., Basu, Sarbani, Hekker, Saskia, Christensen-Dalsgaard, Jørgen, Ball, Warrick H.

“…Abstract Asteroseismic measurements enable inferences of the underlying stellar structure, such as the density and the speed of sound at various points within…”
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Constraining the rotation profile in a low-luminosity subgiant with a surface rotation measurement by Wilson, Tanner A, Casey, Andrew R, Mandel, Ilya, Ball, Warrick H, Bellinger, Earl P, Davies, Guy

“…ABSTRACT Rotationally induced mode splitting frequencies of low-luminosity subgiants suggest that angular momentum transport mechanisms are 1–2 orders of…”
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Determining the Best Method of Calculating the Large Frequency Separation For Stellar Models by Viani, Lucas S., Basu, Sarbani, Corsaro, Enrico, Ball, Warrick H., Chaplin, William J.

“…Asteroseismology of solar-like oscillators often relies on the comparisons between stellar models and stellar observations in order to determine the properties…”
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Prospects for Galactic and stellar astrophysics with asteroseismology of giant stars in the TESS continuous viewing zones and beyond by Mackereth, J Ted, Miglio, Andrea, Elsworth, Yvonne, Mosser, Benoit, Mathur, Savita, Garcia, Rafael A, Nardiello, Domenico, Hall, Oliver J, Vrard, Mathieu, Ball, Warrick H, Basu, Sarbani, Beaton, Rachael L, Beck, Paul G, Bergemann, Maria, Bossini, Diego, Casagrande, Luca, Campante, Tiago L, Chaplin, William J, Chiappini, Cristina, Girardi, Léo, Jørgensen, Andreas Christ Sølvsten, Khan, Saniya, Montalbán, Josefina, Nielsen, Martin B, Pinsonneault, Marc H, Rodrigues, Thaíse S, Serenelli, Aldo, Silva Aguirre, Victor, Stello, Dennis, Tayar, Jamie, Teske, Johanna, van Saders, Jennifer L, Willett, Emma

“…ABSTRACT The NASA Transiting Exoplanet Survey Satellite (NASA-TESS) mission presents a treasure trove for understanding the stars it observes and the Milky…”
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Projected spin–orbit alignments from Kepler asteroseismology and Gaia astrometry by Ball, Warrick H, Triaud, Amaury H M J, Hatt, Emily, Nielsen, Martin B, Chaplin, William J

“…ABSTRACT The angle between the rotation and orbital axes of stars in binary systems – the obliquity – is an important indicator of how these systems form and…”
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Stellar models with calibrated convection and temperature stratification from 3D hydrodynamics simulations by Mosumgaard, Jakob Rørsted, Ball, Warrick H, Silva Aguirre, Víctor, Weiss, Achim, Christensen-Dalsgaard, Jørgen

“…ABSTRACT Stellar evolution codes play a major role in present-day astrophysics, yet they share common simplifications related to the outer layers of stars. We…”
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Solar cycle variation of νmax in helioseismic data and its implications for asteroseismology by Howe, Rachel, Chaplin, William J, Basu, Sarbani, Ball, Warrick H, Davies, Guy R, Elsworth, Yvonne, Hale, Steven J, Miglio, Andrea, Nielsen, Martin Bo, Viani, Lucas S

“…ABSTRACT The frequency, νmax, at which the envelope of pulsation power peaks for solar-like oscillators is an important quantity in asteroseismology. We…”
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Magnetic and Rotational Evolution of ρ CrB from Asteroseismology with TESS by Metcalfe, Travis S., van Saders, Jennifer L., Basu, Sarbani, Buzasi, Derek, Drake, Jeremy J., Egeland, Ricky, Huber, Daniel, Saar, Steven H., Stassun, Keivan G., Ball, Warrick H., Campante, Tiago L., Finley, Adam J., Kochukhov, Oleg, Mathur, Savita, Reinhold, Timo, See, Victor, Baliunas, Sallie, Soon, Willie

“…Abstract During the first half of main-sequence lifetimes, the evolution of rotation and magnetic activity in solar-type stars appears to be strongly coupled…”
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