Search Results - "Pinsonneault, Marc H"

Confirmation of the Gaia DR2 Parallax Zero-point Offset Using Asteroseismology and Spectroscopy in the Kepler Field by Zinn, Joel C., Pinsonneault, Marc H., Huber, Daniel, Stello, Dennis

“…We present an independent confirmation of the zero-point offset of Gaia Data Release 2 parallaxes using asteroseismic data of evolved stars in the Kepler…”
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The SPOTS Models: A Grid of Theoretical Stellar Evolution Tracks and Isochrones for Testing the Effects of Starspots on Structure and Colors by Somers, Garrett, Cao, Lyra, Pinsonneault, Marc H.

“…One-dimensional stellar evolution models have been successful at representing the structure and evolution of stars in diverse astrophysical contexts, but…”
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OLDER AND COLDER: THE IMPACT OF STARSPOTS ON PRE-MAIN-SEQUENCE STELLAR EVOLUTION by Somers, Garrett, Pinsonneault, Marc H.

“…ABSTRACT We assess the impact of starspots on the evolution of late-type stars during the pre-main sequence (pre-MS) using a modified stellar evolution code…”
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Rotation, inflation, and lithium in the Pleiades by Somers, Garrett, Pinsonneault, Marc H.

“…The rapidly rotating cool dwarfs of the Pleiades are rich in lithium relative to their slowly rotating counterparts. Motivated by observations of inflated…”
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Forward Modeling of the Kepler Stellar Rotation Period Distribution: Interpreting Periods from Mixed and Biased Stellar Populations by van Saders, Jennifer L., Pinsonneault, Marc H., Barbieri, Mauro

“…Stellar surface rotation carries information about stellar parameters-particularly ages-and thus the large rotational data sets extracted from Kepler time…”
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A TALE OF TWO ANOMALIES: DEPLETION, DISPERSION, AND THE CONNECTION BETWEEN THE STELLAR LITHIUM SPREAD AND INFLATED RADII ON THE PRE-MAIN SEQUENCE by Somers, Garrett, Pinsonneault, Marc H

“…We investigate lithium depletion in standard stellar models (SSMs) and main sequence (MS) open clusters, and explore the origin of the Li dispersion in young,…”
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HOW GOOD A CLOCK IS ROTATION? THE STELLAR ROTATION-MASS-AGE RELATIONSHIP FOR OLD FIELD STARS by Epstein, Courtney R, Pinsonneault, Marc H

“…The rotation-mass-age relationship offers a promising avenue for measuring the ages of field stars, assuming the attendant uncertainties to this technique can…”
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SPECTROSCOPIC DETERMINATION OF MASSES (AND IMPLIED AGES) FOR RED GIANTS by Ness, M., Hogg, David W., Rix, H.-W., Martig, M., Pinsonneault, Marc H., Ho, A. Y. Q.

“…ABSTRACT The mass of a star is arguably its most fundamental parameter. For red giant stars, tracers luminous enough to be observed across the Galaxy, mass…”
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Weakened magnetic braking as the origin of anomalously rapid rotation in old field stars by van Saders, Jennifer L., Ceillier, Tugdual, Metcalfe, Travis S., Aguirre, Victor Silva, Pinsonneault, Marc H., García, Rafael A., Mathur, Savita, Davies, Guy R.

“…The age of a young to middle-aged star can be determined from how quickly or slowly it rotates, but the relationship breaks down for old stars; models now show…”
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ON LITHIUM-RICH RED GIANTS. I. ENGULFMENT OF SUBSTELLAR COMPANIONS by Aguilera-Gómez, Claudia, Chanamé, Julio, Pinsonneault, Marc H., Carlberg, Joleen K.

“…ABSTRACT A small fraction of red giants are known to be lithium (Li) rich, in contradiction with expectations from stellar evolutionary theory. A possible…”
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Testing Angular Momentum Transport and Wind Loss in Intermediate-mass Core-helium Burning Stars by Tayar, Jamie, Pinsonneault, Marc H.

“…Stars between 2 and 3 M☉ rotate rapidly on the main sequence, and their rotation rates in the core-helium burning (secondary-clump) phase can therefore be used…”
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Core-envelope Decoupling Drives Radial Shear Dynamos in Cool Stars by Cao, Lyra, Pinsonneault, Marc H., van Saders, Jennifer L.

“…Abstract Differential rotation is thought to be responsible for the dynamo process in stars like our Sun, driving magnetic activity and starspots. We report…”
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TESS Stellar Rotation up to 80 Days in the Southern Continuous Viewing Zone by Claytor, Zachary R., van Saders, Jennifer L., Cao, Lyra, Pinsonneault, Marc H., Teske, Johanna, Beaton, Rachael L.

“…Abstract The Transiting Exoplanet Survey Satellite (TESS) mission delivers time-series photometry for millions of stars across the sky, offering a probe into…”
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Constraining Metallicity-dependent Mixing and Extra Mixing Using [C/N] in Alpha-rich Field Giants by Shetrone, Matthew, Tayar, Jamie, Johnson, Jennifer A., Somers, Garrett, Pinsonneault, Marc H., Holtzman, Jon A., Hasselquist, Sten, Masseron, Thomas, Mészáros, Szabolcs, Jönsson, Henrik, Hawkins, Keith, Sobeck, Jennifer, Zamora, Olga, García-Hernández, D. A.

“…Internal mixing on the giant branch is an important process which affects the evolution of stars and the chemical evolution of the galaxy. While several…”
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The Origin of Weakened Magnetic Braking in Old Solar Analogs by Metcalfe, Travis S., Finley, Adam J., Kochukhov, Oleg, See, Victor, Ayres, Thomas R., Stassun, Keivan G., van Saders, Jennifer L., Clark, Catherine A., Godoy-Rivera, Diego, Ilyin, Ilya V., Pinsonneault, Marc H., Strassmeier, Klaus G., Petit, Pascal

“…Abstract The rotation rates of main-sequence stars slow over time as they gradually lose angular momentum to their magnetized stellar winds. The rate of…”
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Bayesian distances and extinctions for giants observed by Kepler and APOGEE by Rodrigues, Thaíse S., Girardi, Léo, Miglio, Andrea, Bossini, Diego, Bovy, Jo, Epstein, Courtney, Pinsonneault, Marc H., Stello, Dennis, Zasowski, Gail, Prieto, Carlos Allende, Chaplin, William J., Hekker, Saskia, Johnson, Jennifer A., Mészáros, Szabolcs, Mosser, Benoît, Anders, Friedrich, Basu, Sarbani, Beers, Timothy C., Chiappini, Cristina, da Costa, Luiz A.N., Elsworth, Yvonne, García, Rafael A., Pérez, Ana E. García, Hearty, Fred R., Maia, Marcio A.G., Majewski, Steven R., Mathur, Savita, Montalbán, Josefina, Nidever, David L., Santiago, Basilio, Schultheis, Mathias, Serenelli, Aldo, Shetrone, Matthew

“…We present a first determination of distances and extinctions for individual stars in the first release of the APOKASC catalogue, built from the joint efforts…”
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Stellar Models are Reliable at Low Metallicity: An Asteroseismic Age for the Ancient Very Metal-poor Star KIC 8144907 by Huber, Daniel, Slumstrup, Ditte, Hon, Marc, Li, Yaguang, Børsen-Koch, Victor Aguirre, Bedding, Timothy R., Joyce, Meridith, Ong, J. M. Joel, Serenelli, Aldo, Stello, Dennis, Berger, Travis, Grunblatt, Samuel K., Greklek-McKeon, Michael, Hirano, Teruyuki, Kirby, Evan N., Pinsonneault, Marc H., Alencastro Puls, Arthur, Zinn, Joel

“…Abstract Very-metal-poor stars ([Fe/H] < −2) are important laboratories for testing stellar models and reconstructing the formation history of our galaxy…”
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The APO-K2 Catalog. II. Accurate Stellar Ages for Red Giant Branch Stars across the Milky Way by Warfield, Jack T., Zinn, Joel C., Schonhut-Stasik, Jessica, Johnson, James W., Pinsonneault, Marc H., Johnson, Jennifer A., Stello, Dennis, Beaton, Rachael L., Elsworth, Yvonne, García, Rafael A., Mathur, Savita, Mosser, Benoît, Serenelli, Aldo, Tayar, Jamie

“…Abstract We present stellar age determinations for 4661 red giant branch stars in the APO-K2 catalog, derived using mass estimates from K2 asteroseismology…”
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Asteroseismology and Spectropolarimetry of the Exoplanet Host Star λ Serpentis by Metcalfe, Travis S., Buzasi, Derek, Huber, Daniel, Pinsonneault, Marc H., van Saders, Jennifer L., Ayres, Thomas R., Basu, Sarbani, Drake, Jeremy J., Egeland, Ricky, Kochukhov, Oleg, Petit, Pascal, Saar, Steven H., See, Victor, Stassun, Keivan G., Li, Yaguang, Bedding, Timothy R., Breton, Sylvain N., Finley, Adam J., García, Rafael A., Kjeldsen, Hans, Nielsen, Martin B., Ong, J. M. Joel, Rørsted, Jakob L., Stokholm, Amalie, Winther, Mark L., Clark, Catherine A., Godoy-Rivera, Diego, Ilyin, Ilya V., Strassmeier, Klaus G., Jeffers, Sandra V., Marsden, Stephen C., Vidotto, Aline A., Baliunas, Sallie, Soon, Willie

“…Abstract The bright star λ Ser hosts a hot Neptune with a minimum mass of 13.6 M ⊕ and a 15.5 day orbit. It also appears to be a solar analog, with a mean…”
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Galactic Globular and Open Clusters in the Sloan Digital Sky Survey. II. Test of Theoretical Stellar Isochrones by An, Deokkeun, Pinsonneault, Marc H, Masseron, Thomas, Delahaye, Franck, Johnson, Jennifer A, Terndrup, Donald M, Beers, Timothy C, Ivans, Inese I, Ivezić, Željko

“…We perform an extensive test of theoretical stellar models for main-sequence (MS) stars in ugriz, using cluster fiducial sequences obtained in the previous…”
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