Search Results - "ELSWORTH, Y"

Detection of solar-like oscillations in relics of the Milky Way: asteroseismology of K giants in M4 using data from the NASA K2 mission by Miglio, A., Chaplin, W. J., Brogaard, K., Lund, M. N., Mosser, B., Davies, G. R., Handberg, R., Milone, A. P., Marino, A. F., Bossini, D., Elsworth, Y. P., Grundahl, F., Arentoft, T., Bedin, L. R., Campante, T. L., Jessen-Hansen, J., Jones, C. D., Kuszlewicz, J. S., Malavolta, L., Nascimbeni, V., Sandquist, E. L.

“…Asteroseismic constraints on K giants make it possible to infer radii, masses and ages of tens of thousands of field stars. Tests against independent estimates…”
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A Combined Analysis of the Observational Aspects of the Quasi-biennial Oscillation in Solar Magnetic Activity by Bazilevskaya, G., Broomhall, A.-M., Elsworth, Y., Nakariakov, V. M.

“…Solar quasi-biennial oscillations (QBOs) with the time scale of 0.6–4 yrs appear to be a basic feature of the Sun’s activity. Observational aspects of QBOs are…”
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Nitrogen depletion in field red giants: mixing during the He flash? by Masseron, T, Lagarde, N, Miglio, A, Elsworth, Y, Gilmore, G

“…We combine simultaneous constraints on stellar evolutionary status from asteroseismology, and on nitrogen abundances derived from large spectroscopic surveys,…”
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Asteroseismology of old open clusters with Kepler: direct estimate of the integrated red giant branch mass-loss in NGC 6791 and 6819 by Miglio, A., Brogaard, K., Stello, D., Chaplin, W. J., D'Antona, F., Montalbán, J., Basu, S., Bressan, A., Grundahl, F., Pinsonneault, M., Serenelli, A. M., Elsworth, Y., Hekker, S., Kallinger, T., Mosser, B., Ventura, P., Bonanno, A., Noels, A., Silva Aguirre, V., Szabo, R., Li, J., McCauliff, S., Middour, C. K., Kjeldsen, H.

“…Mass-loss of red giant branch (RGB) stars is still poorly determined, despite its crucial role in the chemical enrichment of galaxies. Thanks to the recent…”
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Hot super-Earths stripped by their host stars by Lundkvist, M. S., Kjeldsen, H., Albrecht, S., Davies, G. R., Basu, S., Huber, D., Justesen, A. B., Karoff, C., Silva Aguirre, V., Van Eylen, V., Vang, C., Arentoft, T., Barclay, T., Bedding, T. R., Campante, T. L., Chaplin, W. J., Christensen-Dalsgaard, J., Elsworth, Y. P., Gilliland, R. L., Handberg, R., Hekker, S., Kawaler, S. D., Lund, M. N., Metcalfe, T. S., Miglio, A., Rowe, J. F., Stello, D., Tingley, B., White, T. R.

“…Simulations predict that hot super-Earth sized exoplanets can have their envelopes stripped by photoevaporation, which would present itself as a lack of these…”
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Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology by Silva Aguirre, V., Davies, G. R., Basu, S., Christensen-Dalsgaard, J., Creevey, O., Metcalfe, T. S., Bedding, T. R., Casagrande, L., Handberg, R., Lund, M. N., Nissen, P. E., Chaplin, W. J., Huber, D., Serenelli, A. M., Stello, D., Van Eylen, V., Campante, T. L., Elsworth, Y., Gilliland, R. L., Hekker, S., Karoff, C., Kawaler, S. D., Kjeldsen, H., Lundkvist, M. S.

“…We present a study of 33 Kepler planet-candidate host stars for which asteroseismic observations have sufficiently high signal-to-noise ratio to allow…”
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Asteroseismic inference on rotation, gyrochronology and planetary system dynamics of 16 Cygni by Davies, G R, Chaplin, W J, Farr, W M, Garcia, R A, Lund, M N, Mathis, S, Metcalfe, T S, Appourchaux, T, Basu, S, Benomar, O, Campante, T L, Ceillier, T, Elsworth, Y, Handberg, R, Salabert, D, Stello, D

“…The solar analogues 16 Cyg A and B are excellent asteroseismic targets in the Kepler field of view and together with a red dwarf and a Jovian planet form an…”
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Mirror principle and the red-giant bump: the battle of entropy in low-mass stars by Hekker, S, Angelou, G C, Elsworth, Y, Basu, S

“…ABSTRACT The evolution of low-mass stars into red giants is still poorly understood. During this evolution the core of the star contracts and, simultaneously,…”
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Low-degree solar rotational splitting from 45 yr of BiSON observations by Howe, Rachel, Chaplin, W J, Elsworth, Y P, Hale, S J, Nielsen, M B

“…ABSTRACT We present solar low-degree rotational splitting values based on a new analysis of Sun-as-a-star observations from the Birmingham Solar Oscillations…”
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Oscillation frequencies for 35 Kepler solar-type planet-hosting stars using Bayesian techniques and machine learning by Davies, G. R., Aguirre, V. Silva, Bedding, T. R., Handberg, R., Lund, M. N., Chaplin, W. J., Huber, D., White, T. R., Benomar, O., Hekker, S., Basu, S., Campante, T. L., Christensen-Dalsgaard, J., Elsworth, Y., Karoff, C., Kjeldsen, H., Lundkvist, M. S., Metcalfe, T. S., Stello, D.

“…Kepler has revolutionized our understanding of both exoplanets and their host stars. Asteroseismology is a valuable tool in the characterization of stars and…”
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Unexpected solar-cycle variation of acoustic mode power in Sun-as-a-star observations by Howe, Rachel, Chaplin, W J, Elsworth, Y P, Hale, S J, Nielsen, M B

“…ABSTRACT We examine the solar-cycle variation of the power in the low-degree helioseismic modes by looking at binned power spectra from 45 yr of observations…”
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Low-frequency, low-degree solar p-mode properties from 22 years of Birmingham Solar Oscillations Network data by Davies, G. R., Broomhall, A. M., Chaplin, W. J., Elsworth, Y., Hale, S. J.

“…The solar low-degree low-frequency modes of oscillation are of particular interest as their frequencies can be measured with very high precision and hence…”
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The Octave (Birmingham–Sheffield Hallam) automated pipeline for extracting oscillation parameters of solar-like main-sequence stars by Hekker, S., Broomhall, A.-M., Chaplin, W. J., Elsworth, Y. P., Fletcher, S. T., New, R., Arentoft, T., Quirion, P.-O., Kjeldsen, H.

“…The number of main-sequence stars for which we can observe solar-like oscillations is expected to increase considerably with the short-cadence high-precision…”
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Oscillating red giants in eclipsing binary systems: empirical reference value for asteroseismic scaling relation by Themeßl, N, Hekker, S, Southworth, J, Beck, P G, Pavlovski, K, Tkachenko, A, Angelou, G C, Ball, W H, Barban, C, Corsaro, E, Elsworth, Y, Handberg, R, Kallinger, T

“…ABSTRACT The internal structures and properties of oscillating red-giant stars can be accurately inferred through their global oscillation modes…”
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Performance of the Birmingham Solar-Oscillations Network (BiSON) by Hale, S. J., Howe, R., Chaplin, W. J., Davies, G. R., Elsworth, Y. P.

“…The Birmingham Solar-Oscillations Network (BiSON) has been operating with a full complement of six stations since 1992. Over 20 years later, we look back on…”
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SEISMIC EVIDENCE FOR A RAPIDLY ROTATING CORE IN A LOWER-GIANT-BRANCH STAR OBSERVED WITH KEPLER by Deheuvels, S, Garcia, R A, Chaplin, W J, Basu, S, Antia, H M, APPOURCHAUX, T, BENOMAR, O, Davies, G R, Elsworth, Y, Gizon, L

“…Rotation is expected to have an important influence on the structure and the evolution of stars. However, the mechanisms of angular momentum transport in stars…”
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BiSON data preparation: a correction for differential extinction and the weighted averaging of contemporaneous data by Davies, G. R., Chaplin, W. J., Elsworth, Y., Hale, S. J.

“…The Birmingham Solar Oscillations Network (BiSON) has provided high-quality high-cadence observations from as far back in time as 1978. These data must be…”
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Super-Nyquist asteroseismology of solar-like oscillators with Kepler and K2 – expanding the asteroseismic cohort at the base of the red giant branch by Chaplin, W. J., Elsworth, Y., Davies, G. R., Campante, T. L., Handberg, R., Miglio, A., Basu, S.

“…We consider the prospects for detecting solar-like oscillations in the ‘super-Nyquist’ regime of long-cadence (LC) Kepler photometry, i.e. above the associated…”
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Characterization of red giant stars in the public Kepler data by Hekker, S., Gilliland, R. L., Elsworth, Y., Chaplin, W. J., De Ridder, J., Stello, D., Kallinger, T., Ibrahim, K. A., Klaus, T. C., Li, J.

“…The first public release of long-cadence stellar photometric data collected by the NASA Kepler mission has now been made available. In this paper, we…”
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Why should we correct reported pulsation frequencies for stellar line-of-sight Doppler velocity shifts? by Davies, G. R., Handberg, R., Miglio, A., Campante, T. L., Chaplin, W. J., Elsworth, Y.

“…In the age of Kepler and CoRoT, extended observations have provided estimates of stellar pulsation frequencies that have achieved new levels of precision,…”
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