Results 41 to 50 of about 1,219 (138)

TESS Observations of the Pleiades Cluster: A Nursery for δ Scuti Stars

The Astrophysical Journal Letters, 2023
We studied 89 A- and F-type members of the Pleiades open cluster, including five escaped members. We measured projected rotational velocities ( $v\sin i$ ) for 49 stars and confirmed that stellar rotation causes a broadening of the main sequence in the ...
Timothy R. Bedding, Simon J. Murphy, Courtney Crawford, Daniel R. Hey, Daniel Huber, Hans Kjeldsen, Yaguang Li, Andrew W. Mann, Guillermo Torres, Timothy R. White, George Zhou   +10 more
doaj   +1 more source

The Effects of Metallicity on Convective Overshoot Behavior in Models of δ Scuti Variable Stars

The Astrophysical Journal, 2022
Abstract δ Scuti variables are stars which exhibit periodic changes in their luminosity through radial and nonradial pulsations. Internally, these stars have relatively small convective cores, and convective overshoot can significantly affect the size.
V. Dornan, C. C. Lovekin
openaire   +2 more sources

Measuring mean densities of delta Scuti stars with asteroseismology. Theoretical properties of large separations using TOUCAN

, 2014
We aim at studying the theoretical properties of the regular spacings found in the oscillation spectra of delta Scuti stars. We performed a multi-variable analysis covering a wide range of stellar structure and seismic properties and model parameters ...
A. García Hernández, A. Moya, Antoci, Baglin, Breger, Breger, Breger, C. Rodrigo, Catala, Christensen-Dalsgaard, Dupret, Dziembowski, Dziembowski, E. Solano, García Hernández, García Hernández, Gilliland, Gough, Goupil, Handler, J. C. Suárez, J. R. Rodón, Jackson, Kallinger, Kjeldsen, Lebreton, Lignières, Lignières, MacGregor, Mantegazza, Matthews, Metcalfe, Morel, Morel, Moya, Moya, Moya, Moya, Moya, Paxton, Perryman, Poretti, Poretti, Poretti, R. Garrido, Reese, Reese, Reese, Reese, Soufi, Suárez, Suárez, Suárez, Suárez, Tassoul, Tingley, Uytterhoeven, Uytterhoeven, Walker, Winn, Wright, Zahn, Zwintz   +62 more
core   +1 more source

Asteroseismic Determination of Stellar Rotation: On Synchronization in the Close Eclipsing Binaries AB Cas and OO Dra

The Astrophysical Journal, 2023
A star’s rotation rate is difficult to estimate without surface inhomogeneities such as dark or bright spots. This paper presents asteroseismic results to determine the rotation rates of δ Sct-type pulsating primary stars in two eclipsing binary systems,
Seung-Lee Kim
doaj   +1 more source

Interaction Between Convection and Pulsation [PDF]

, 2015
This article reviews our current understanding of modelling convection dynamics in stars. Several semi-analytical time-dependent convection models have been proposed for pulsating one-dimensional stellar structures with different formulations for how the
A Baglin, A Boury, A Grigahcène, A Grigahcène, A Moya, A Munteanu, A Nordlund, AA Townsend, AN Cox, AS Brun, AS Brun, AS Eddington, B Freytag, B Mosser, B Paczyński, CM Geroux, CS Rosenthal, CS Rosenthal, CW Straka, D Huber, D Mihalas, D Stello, D Stello, D-R Xiong, D-R Xiong, D-R Xiong, D-R Xiong, DA Keeley, DB Guenther, DO Gough, DO Gough, DO Gough, DO Gough, DO Gough, DO Gough, DO Gough, DO Gough, DO Gough, DO Gough, DO Gough, DO Gough, DO Gough, DO Gough, DO Gough, DO Gough, DR Xiong, DR Xiong, DR Xiong, DR Xiong, DR Xiong, DR Xiong, DW Kurtz, DW Kurtz, DW Kurtz, E Böhm-Vitense, E Mundprecht, E Rodríguez, E Schatzman, E Vitense, EA Olivier, EA Spiegel, EA Spiegel, EJ Öpik, EL Koschmieder, F Baudin, F Carrier, F Kamijo, F Kupka, F Kupka, FJ Robinson, G Bono, G Bono, G Gonczi, G Gonczi, G Gonczi, G Gonczi, G Houdek, G Houdek, G Houdek, G Houdek, G Houdek, G Houdek, G Houdek, G Houdek, G Houdek, G Houdek, G Houdek, G Houdek, GE Langer, GI Taylor, GI Taylor, GK Batchelor, GW Platzman, H Cugier, H Kjeldsen, H Kjeldsen, H Saio, H Shibahashi, H Siedentopf, H Siedentopf, HJ Muthsam, HM Antia, J Boussinesq, J Christensen-Dalsgaard, J Christensen-Dalsgaard, J Christensen-Dalsgaard, J Christensen-Dalsgaard, J Christensen-Dalsgaard, J Christensen-Dalsgaard, J Christensen-Dalsgaard, J Christensen-Dalsgaard, J Christensen-Dalsgaard, J Christensen-Dalsgaard, J Christensen-Dalsgaard, J Christensen-Dalsgaard, J Christensen-Dalsgaard, J Daszyńska-Daszkiewicz, J Daszyńska-Daszkiewicz, J De Ridder, J Montalbán, J Rotta, JA Guzik, JA Guzik, JA Guzik, JA Guzik, JC Suärez, JI Castor, JL Innis, JM Mihaljan, JO Petersen, JP Cox, JR Buchler, JR Elliott, JR Elliott, K Belkacem, K Belkacem, K Belkacem, K Hanjalic, KL Chan, L Biermann, L Biermann, L Biermann, L Biermann, L Bigot, L Prandtl, L Prandtl, LA Balona, LA Balona, LD Landau, LH Li, LV Keller, M Breger, M Gabriel, M Gabriel, M Gabriel, M Gehmeyr, M Grosjean, M Gruberbauer, M Gruberbauer, M Millionshtchikov, M Salaris, M Takata, M Takata, M-A Dupret, M-A Dupret, M-A Dupret, M-A Dupret, M-A Dupret, M-A Dupret, M-A Dupret, M-A Dupret, M-A Dupret, M-A Dupret, M-A Dupret, MH Montgomery, MH Montgomery, MS Cunha, MS Cunha, MS Miesch, N Baker, N Baker, N Baker, N Dolez, NH Baker, NH Baker, NJ Balmforth, NJ Balmforth, NJ Balmforth, NJ Balmforth, NJ Balmforth, O Kochukhov, P Goldreich, P Goldreich, P Kumar, P Ledoux, P Ledoux, PA Stamford, PA Yecko, PD Edmonds, PD Tooth, PH Smith, PY Chou, R Garrido, R Kuhfuß, R Samadi, R Smolec, R Smolec, R Smolec, R Smolec, R Swenson, R Trampedach, R Trampedach, R Trampedach, R Trampedach, RA García, RD Watson, RF Stein, RF Stein, RF Stein, RF Stellingwerf, RF Stellingwerf, RF Stellingwerf, RF Stellingwerf, RG Deupree, RG Deupree, RH Kraichnan, RK Ulrich, S Chandrasekhar, S Chandrasekhar, S Frandsen, S Hekker, S Mathur, S Théado, S Wedemeyer, S-A Orszag, SA Grossman, SC Tripathy, ST Fletcher, T Appourchaux, T Appourchaux, T Appourchaux, T Kallinger, TC Teixeira, TG Cowling, TM Brown, TS Metcalfe, TS Metcalfe, V Antoci, V Antoci, VM Canuto, VM Canuto, VM Canuto, VM Canuto, VM Canuto, W Dziembowski, W Dziembowski, W Dziembowski, W Heisenberg, W Rodi, W Unno, W Unno, W Unno, W Unno, W Unno, W Unno, WA Dziembowski, WH Ball, WJ Chaplin, WJ Chaplin, WP Jones, WP Jones, Y-C Kim, Z Magic, Z Magic   +273 more
core   +4 more sources

The study of short orbital period delta Scuti pulsating variable star

, 2019
In this contribution, we pointed out the applicability of Modified binarogram in detecting low orbit Kepler binaries.
Mohammed, Yasin Abduselam, Feleke Getinet   +1 more
openaire   +1 more source

TIC 5724661: A Long-period Binary with a Pulsating sdB Star and δ Scuti Variable

The Astrophysical Journal, 2022
Abstract Using TESS 20 s cadence data, we have discovered an unusual combination of pulsating stars in what we infer to be a binary system. The binary consists of a standard δ Scuti star with pulsations over the range 32–41 day−1; this is in a likely wide orbit with a hot subdwarf-B (sdB) star, which itself has a large-amplitude p-mode ...
Rahul Jayaraman, Saul A. Rappaport, Lorne Nelson, Donald W. Kurtz, George Dufresne, Gerald Handler, Abdel Senhadji, David W. Latham, George Zhou, Allyson Bieryla, George R. Ricker   +10 more
openaire   +3 more sources

Variable Blue Straggler Stars in the Open Cluster NGC 6819 Observed in the Kepler “Superstamp” Field

The Astronomical Journal, 2023
NGC 6819 is an open cluster of age 2.4 Gyr that was in the NASA Kepler spacecraft’s field of view from 2009 to 2013. The central part of the cluster was observed in a 200 × 200 pixel “superstamp” during these four years in 30 minute cadence photometry ...
Joyce A. Guzik, Andrzej S. Baran, Sachu Sanjayan, Péter Németh, Anne M. Hedlund, Jason Jackiewicz, Lori R. Dauelsberg   +6 more
doaj   +1 more source

MOST discovers a multimode delta Scuti star in a triple system: HD 61199

, 2008
A field star, HD 61199 (V ~ 8), simultaneously observed with Procyon by the MOST (Microvariability & Oscillations of STars) satellite in continuous runs of 34, 17, and 34 days in 2004, 2005, and 2007, was found to pulsate in 11 frequencies in the delta ...
A. F. J. Moffat, A. Scholtz, Balona, Breger, Böhm-Vitense, D. B. Guenther, D. Huber, D. Sasselov, Daszynska-Daszkiewicz, Donati, Dziemblowski, Dziembowski, Frémat, G. A. H. Walker, Gatewood, H. Lehmann, Hadrava, Hauck, Heiter, Huber, J. F. Rowe, J. M. Matthews, Kupka, Kupka, Lenz, M. Hareter, Matthews, Matthews, Moon, Napiwotzki, O. Kochukhov, P. Lenz, Piskunov, R. Kuschnig, Reegen, Reegen, Ribas, Rowe, Ryabchikova, S. Rucinski, Schaller, Stellingwerf, V. Tsymbal, W. W. Weiss, Walker   +44 more
core   +2 more sources

Asteroseismology Applied to Constrain Structure Parameters of δ Scuti Stars

The Astrophysical Journal
Asteroseismology is a powerful tool to probe stellar structure. Spaceborne instruments like CoRoT, Kepler, and TESS have observed the oscillations of numerous stars, among which δ Scutis are particularly interesting, owing to their fast rotation and ...
Subrata Kumar Panda, Siddharth Dhanpal, Simon J. Murphy, Shravan Hanasoge, Timothy R. Bedding   +4 more
doaj   +1 more source