Search Results - "Ong, J. M. Joel"

Mode Mixing and Rotational Splittings. II. Reconciling Different Approaches to Mode Coupling by Ong, J. M. Joel, Gehan, Charlotte

“…Abstract In the mixed-mode asteroseismology of subgiants and red giants, the coupling between the p- and g- mode cavities must be understood well in order to…”
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Investigating the Metallicity-Mixing-length Relation by Viani, Lucas S., Basu, Sarbani, J. M., Joel Ong, Bonaca, Ana, Chaplin, William J.

“…Stellar models typically use the mixing-length approximation as a way to implement convection in a simplified manner. While conventionally the value of the…”
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Red Giant Rotational Inversion Kernels Need Nonlinear Surface Corrections by Ong, J. M. Joel

“…Abstract Asteroseismology is our only means of measuring the rotations of stars in their interiors, rather than at their surfaces. Some techniques for…”
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Mixed Modes and Asteroseismic Surface Effects. I. Analytic Treatment by Joel Ong, J. M., Basu, Sarbani, Roxburgh, Ian W.

“…Abstract Normal-mode oscillation frequencies computed from stellar models differ from those that would be measured from stars with identical interior…”
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Evolutionary and Observational Properties of Red Giant Acoustic Glitch Signatures by Saunders, David P., Ong, J. M. Joel, Basu, Sarbani

“…Abstract While solar-like oscillations in red giants have been observed at massive scales by the Kepler mission, few features of these oscillation mode…”
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The Gasing Pangkah Collaboration. I. Asteroseismic Identification and Characterization of a Rapidly Rotating Engulfment Candidate by Ong 王, J. M. Joel 加冕, Hon, Marc Teng Yen, Soares-Furtado, Melinda, Stephan, Alexander P., van Saders, Jennifer, Tayar, Jamie, Shappee, Benjamin, Hey, Daniel R., Cao, Lyra, Yıldız, Mutlu, Orhan, Zeynep Çelik, Örtel, Sibel, Montet, Benjamin, Holoien, Thomas W.-S., Bland-Hawthorn, Joss, Buder, Sven, De Silva, Gayandhi M., Freeman, Ken C., Martell, Sarah L., Lewis, Geraint F., Sharma, Sanjib, Stello, Dennis

“…Abstract We report the discovery and characterization of TIC 350842552 (“Zvrk”), an apparently isolated, rapidly rotating ( P rot ∼ 99 days) red giant observed…”
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Fossil Signatures of Main-sequence Convective Core Overshoot Estimated through Asteroseismic Analyses by Lindsay, Christopher J., Ong, J. M. Joel, Basu, Sarbani

“…Abstract Some physical processes that occur during a star's main-sequence evolution also affect its post-main-sequence evolution. It is well known that stars…”
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Near-core Acoustic Glitches Are Not Oscillatory: Consequences for Asteroseismic Probes of Convective Boundary Mixing by Lindsay, Christopher J., Ong, J. M. Joel, Basu, Sarbani

“…Abstract Asteroseismology has been used extensively in recent years to study the interior structure and physical processes of main-sequence stars. We consider…”
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Mode Mixing and Rotational Splittings. I. Near-degeneracy Effects Revisited by Ong, J. M. Joel, Bugnet, Lisa, Basu, Sarbani

“…Abstract Rotation is typically assumed to induce strictly symmetric rotational splitting into the rotational multiplets of pure p - and g -modes. However, for…”
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Differential Modeling Systematics across the HR Diagram from Asteroseismic Surface Corrections by Ong, J. M. Joel, Basu, Sarbani, McKeever, Jean M.

“…Localized modeling error in the near-surface layers of evolutionary stellar models causes the frequencies of their normal modes of oscillation to differ from…”
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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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TESS Asteroseismology of β Hydri: A Subgiant with a Born-again Dynamo by Metcalfe, Travis S., van Saders, Jennifer L., Huber, Daniel, Buzasi, Derek, García, Rafael A., Stassun, Keivan G., Basu, Sarbani, Breton, Sylvain N., Claytor, Zachary R., Corsaro, Enrico, Nielsen, Martin B., Ong, J. M. Joel, Saunders, Nicholas, Stokholm, Amalie, Bedding, Timothy R.

“…Abstract The solar-type subgiant β Hyi has long been studied as an old analog of the Sun. Although the rotation period has never been measured directly, it was…”
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Structural and Evolutionary Diagnostics from Asteroseismic Phase Functions by Ong, J. M. Joel, Basu, Sarbani

“…In the asymptotic parameterization of mode frequencies, the phase function ϵ( ) completely specifies the detailed structure of the frequency eigenvalues. In…”
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Mixed Modes and Asteroseismic Surface Effects. II. Subgiant Systematics by Ong, J. M. Joel, Basu, Sarbani, Lund, Mikkel N., Bieryla, Allyson, Viani, Lucas S., Latham, David W.

“…Abstract Models of solar-like oscillators yield acoustic modes at different frequencies than would be seen in actual stars possessing identical interior…”
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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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Revisiting the Red Giant Branch Hosts KOI-3886 and ι Draconis. Detailed Asteroseismic Modeling and Consolidated Stellar Parameters by Campante, Tiago L., Li, Tanda, Ong, J. M. Joel, Corsaro, Enrico, Cunha, Margarida S., Bedding, Timothy R., Bossini, Diego, Breton, Sylvain N., Buzasi, Derek L., Chaplin, William J., Deal, Morgan, García, Rafael A., Hill, Michelle L., Hon, Marc, Huber, Daniel, Jiang, Chen, Kane, Stephen R., Kayhan, Cenk, Kuszlewicz, James S., Lillo-Box, Jorge, Mathur, Savita, F. G. Monteiro, Mário J. P., Pereira, Filipe, Santos, Nuno C., Serenelli, Aldo, Stello, Dennis

“…Abstract Asteroseismology is playing an increasingly important role in the characterization of red giant host stars and their planetary systems. Here, we…”
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Explaining Deviations from the Scaling Relationship of the Large Frequency Separation by Ong, J. M. Joel, Basu, Sarbani

“…Asteroseismic large frequency separations possess great diagnostic value. However, their expressions as scaling relations are predicated on homology arguments…”
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Mixed-mode Asteroseismology of Red Giant Stars Through the Luminosity Bump by Lindsay, Christopher J., Ong, J. M. Joel, Basu, Sarbani

“…Abstract Most current models of low-mass red giant stars do not reproduce the observed position of the red giant branch luminosity bump, a diagnostic of the…”
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Asteroseismic g-mode period spacings in strongly magnetic rotating stars by Rui, Nicholas Z, Ong, J M Joel, Mathis, Stéphane

“…ABSTRACT Strong magnetic fields are expected to significantly modify the pulsation frequencies of waves propagating in the cores of red giants or in the…”
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Semianalytic Expressions for the Isolation and Coupling of Mixed Modes by Ong, J. M. Joel, Basu, Sarbani

“…In the oscillation spectra of giant stars, nonradial modes may be seen to undergo avoided crossings, which produce a characteristic "mode bumping" of the…”
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