Search Results - "Mathur, Savita"

Evolution of Co-existing Long and Short Period Stellar Activity Cycles by Brandenburg, Axel, Mathur, Savita, Metcalfe, Travis S.

“…The magnetic activity of the Sun becomes stronger and weaker over roughly an 11 year cycle, modulating the radiation and charged particle environment…”
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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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A search for red giant solar-like oscillations in all Kepler data by Hon, Marc, Stello, Dennis, García, Rafael A, Mathur, Savita, Sharma, Sanjib, Colman, Isabel L, Bugnet, Lisa

“…ABSTRACT The recently published Kepler mission Data Release 25 (DR25) reported on ∼197 000 targets observed during the mission. Despite this, no wide search…”
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Gravity modes as a way to distinguish between hydrogen- and helium-burning red giant stars by Bedding, Timothy R., Mosser, Benoit, Huber, Daniel, Montalbán, Josefina, Beck, Paul, Christensen-Dalsgaard, Jørgen, Elsworth, Yvonne P., García, Rafael A., Miglio, Andrea, Stello, Dennis, White, Timothy R., De Ridder, Joris, Hekker, Saskia, Aerts, Conny, Barban, Caroline, Belkacem, Kevin, Broomhall, Anne-Marie, Brown, Timothy M., Buzasi, Derek L., Carrier, Fabien, Chaplin, William J., Di Mauro, Maria Pia, Dupret, Marc-Antoine, Frandsen, Søren, Gilliland, Ronald L., Goupil, Marie-Jo, Jenkins, Jon M., Kallinger, Thomas, Kawaler, Steven, Kjeldsen, Hans, Mathur, Savita, Noels, Arlette, Aguirre, Victor Silva, Ventura, Paolo

“…Kepler-based asteroseismology sorts red giants NASA's Kepler mission has been remarkably productive in its primary role, that of discovering and characterizing…”
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Spin alignment of stars in old open clusters by Corsaro, Enrico, Lee, Yueh-Ning, García, Rafael A., Hennebelle, Patrick, Mathur, Savita, Beck, Paul G., Mathis, Stephane, Stello, Dennis, Bouvier, Jérôme

“…Stellar clusters form by gravitational collapse of turbulent molecular clouds, with up to several thousand stars per cluster 1 . They are thought to be the…”
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Magnetic Activity Evolution of Solar-like Stars. I. S ph–Age Relation Derived from Kepler Observations by Mathur, Savita, Claytor, Zachary R., Santos, Ângela R. G., García, Rafael A., Amard, Louis, Bugnet, Lisa, Corsaro, Enrico, Bonanno, Alfio, Breton, Sylvain N., Godoy-Rivera, Diego, Pinsonneault, Marc H., van Saders, Jennifer

“…Abstract The ages of solar-like stars have been at the center of many studies such as exoplanet characterization or Galactic-archeology. While ages are usually…”
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CoRoT Reveals a Magnetic Activity Cycle in a Sun-Like Star by García, Rafael A, Mathur, Savita, Salabert, David, Ballot, Jérôme, Régulo, Clara, Metcalfe, Travis S, Baglin, Annie

“…The 11-year activity cycle of the Sun is a consequence of a dynamo process occurring beneath its surface. We analyzed photometric data obtained by the CoRoT…”
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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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The APO-K2 Catalog. I. ∼7500 Red Giants with Fundamental Stellar Parameters from APOGEE DR17 Spectroscopy and K2-GAP Asteroseismology by Schonhut-Stasik, Jessica, Zinn, Joel C., Stassun, Keivan G., Pinsonneault, Marc, Johnson, Jennifer A., Warfield, Jack T., Stello, Dennis, Elsworth, Yvonne, García, Rafael A., Mathur, Savita, Mosser, Benoit, Hon, Marc, Tayar, Jamie, Stringfellow, Guy S., Beaton, Rachael L., Jönsson, Henrik, Minniti, Dante

“…Abstract We present a catalog of fundamental stellar properties for ∼7500 evolved stars, including stellar radii and masses, determined from the combination of…”
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Spinning up the Surface: Evidence for Planetary Engulfment or Unexpected Angular Momentum Transport? by Tayar, Jamie, Moyano, Facundo D., Soares-Furtado, Melinda, Escorza, Ana, Joyce, Meridith, Martell, Sarah L., García, Rafael A., Breton, Sylvain N., Mathis, Stéphane, Mathur, Savita, Delsanti, Vincent, Kiefer, Sven, Reffert, Sabine, Bowman, Dominic M., Van Reeth, Timothy, Shetye, Shreeya, Gehan, Charlotte, Grunblatt, Samuel K.

“…Abstract In this paper, we report the potential detection of a nonmonotonic radial rotation profile in a low-mass lower-luminosity giant star. For most low-…”
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Evidence for compact binary systems around Kepler red giants by Colman, Isabel L., Huber, Daniel, Bedding, Timothy R., Kuszlewicz, James S., Yu, Jie, Beck, Paul G., Elsworth, Yvonne, García, Rafael A., Kawaler, Steven D., Mathur, Savita, Stello, Dennis, White, Timothy R.

“…Abstract We present an analysis of 168 oscillating red giants from NASA's Kepler mission that exhibit anomalous peaks in their Fourier amplitude spectra. These…”
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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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Towards age/rotation/magnetic activity relation with seismology by Mathur, Savita

“…The knowledge of stellar ages directly impacts the characterization of a planetary system as it puts strong constraints on the moment when the system was born…”
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Revisiting the Impact of Stellar Magnetic Activity on the Detectability of Solar-Like Oscillations by Kepler by Mathur, Savita, García, Rafael A., Bugnet, Lisa, Santos, Ângela R.G., Santiago, Netsha, Beck, Paul G.

“…Over 2,000 stars were observed for 1 month with a high enough cadence in order to look for acoustic modes during the survey phase of the Kepler mission…”
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A Giant Impact as the Likely Origin of Different Twins in the Kepler-107 Exoplanet System by Bonomo, Aldo S., Zeng, Li, Damasso, Mario, Leinhardt, Zoe M., Justesen, Anders B., Lopez, Eric, Lund, Mikkel N., Malavolta, Luca, Aguirre, Victor Silva, Buchhave, Lars A., Corsaro, Enrico, Denman, Thomas, Lopez-Morales, Mercedes, Mills, Sean M., Mortier, Annelies, Rice, Ken, Sozzetti, Alessandro, Vanderburg, Andrew, Affer, Laura, Arentoft, Torben, Benbakoura, Mansour, Bouchy, François, Christensen-Dalsgaard, Joergen, Cameron, Andrew Collier, Cosentino, Rosario, Dressing, Courtney D., Dumusque, Xavier, Figueira, Pedro, Fiorenzano, Aldo F. M., García, Rafael A., Handberg, Rasmus, Harutyunyan, Avet, Johnson, John A., Kjeldsen, Hans, Latham, David W., Lovis, Christophe, Lundkvist, Mia S., Mathur, Savita, Mayor, Michel, Micela, Giusi, Molinari, Emilio, Motalebi, Fatemeh, Nascimbeni, Valerio, Nava, Chantanelle, Pepe, Francesco, Phillips, David F., Piotto, Giampaolo, Poretti, Ennio, Sasselov, Dimitar, Ségransan, Damien, Udry, Stéphane, Watson, Chris

“…Measures of exoplanet bulk densities indicate that small exoplanets with radius less than 3 Earth radii (R(sub ⊕)) range from low-density sub-Neptunes…”
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Perspectives on the physics of late-type stars from beyond low earth orbit, the moon and mars by Mathur, Savita, Santos, Ângela R. G.

“…With the new discoveries enabled thanks to the recent space missions, stellar physics is going through a revolution. However, these discoveries opened the door…”
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Age dating of an early Milky Way merger via asteroseismology of the naked-eye star ν Indi by Chaplin, William J., Serenelli, Aldo M., Miglio, Andrea, Morel, Thierry, Mackereth, J. Ted, Vincenzo, Fiorenzo, Kjeldsen, Hans, Basu, Sarbani, Ball, Warrick H., Stokholm, Amalie, Verma, Kuldeep, Mosumgaard, Jakob Rørsted, Silva Aguirre, Victor, Mazumdar, Anwesh, Ranadive, Pritesh, Antia, H. M., Lebreton, Yveline, Ong, Joel, Appourchaux, Thierry, Bedding, Timothy R., Christensen-Dalsgaard, Jørgen, Creevey, Orlagh, García, Rafael A., Handberg, Rasmus, Huber, Daniel, Kawaler, Steven D., Lund, Mikkel N., Metcalfe, Travis S., Stassun, Keivan G., Bazot, Michäel, Beck, Paul G., Bell, Keaton J., Bergemann, Maria, Buzasi, Derek L., Benomar, Othman, Bossini, Diego, Bugnet, Lisa, Campante, Tiago L., Orhan, Zeynep Çelik, Corsaro, Enrico, González-Cuesta, Lucía, Davies, Guy R., Di Mauro, Maria Pia, Egeland, Ricky, Elsworth, Yvonne P., Gaulme, Patrick, Ghasemi, Hamed, Guo, Zhao, Hall, Oliver J., Hasanzadeh, Amir, Hekker, Saskia, Howe, Rachel, Jenkins, Jon M., Jiménez, Antonio, Kiefer, René, Kuszlewicz, James S., Kallinger, Thomas, Latham, David W., Lundkvist, Mia S., Mathur, Savita, Montalbán, Josefina, Mosser, Benoit, Bedón, Andres Moya, Nielsen, Martin Bo, Örtel, Sibel, Rendle, Ben M., Ricker, George R., Rodrigues, Thaíse S., Roxburgh, Ian W., Safari, Hossein, Schofield, Mathew, Seager, Sara, Smalley, Barry, Stello, Dennis, Szabó, Róbert, Tayar, Jamie, Themeßl, Nathalie, Thomas, Alexandra E. L., Vanderspek, Roland K., van Rossem, Walter E., Vrard, Mathieu, Weiss, Achim, White, Timothy R., Winn, Joshua N., Yıldız, Mutlu

“…Over the course of its history, the Milky Way has ingested multiple smaller satellite galaxies 1 . Although these accreted stellar populations can be…”
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Photometric magnetic-activity metrics tested with the Sun: application to Kepler M dwarfs by Mathur, Savita, Salabert, David, García, Rafael A., Ceillier, Tugdual

“…The Kepler mission has been providing high-quality photometric data leading to many breakthroughs in the exoplanet search and in stellar physics. Stellar…”
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Seismic constraints on rotation of Sun-like star and mass of exoplanet by Gizon, Laurent, Ballot, Jérome, Michel, Eric, Stahn, Thorsten, Vauclair, Gérard, Bruntt, Hans, Quirion, Pierre-Olivier, Benomar, Othman, Vauclair, Sylvie, Appourchaux, Thierry, Auvergne, Michel, Baglin, Annie, Barban, Caroline, Baudin, Fréderic, Bazot, Michaël, Campante, Tiago, Catala, Claude, Chaplin, William, Creevey, Orlagh, Deheuvels, Sébastien, Dolez, Noël, Elsworth, Yvonne, García, Rafael, Gaulme, Patrick, Mathis, Stéphane, Mathur, Savita, Mosser, Benoît, Régulo, Clara, Roxburgh, Ian, Salabert, David, Samadi, Réza, Sato, Kumiko, Verner, Graham, Hanasoge, Shravan, Sreenivasan, Katepalli R.

“…Rotation is thought to drive cyclic magnetic activity in the Sun and Sun-like stars. Stellar dynamos, however, are poorly understood owing to the scarcity of…”
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Kepler main-sequence solar-like stars: surface rotation and magnetic-activity evolution by Santos, Ângela R. G., Godoy-Rivera, Diego, Finley, Adam J., Mathur, Savita, García, Rafael A., Breton, Sylvain N., Broomhall, Anne-Marie

“…While the mission’s primary goal was focused on exoplanet detection and characterization, Kepler made and continues to make extraordinary advances in stellar…”
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