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Related papers: Systematic search for stellar pulsators in the ecl…

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KIC 9851944 is a short period ($P=2.16$ days) eclipsing binary in the {\it Kepler} field of view. By combining the analysis of {\it Kepler} photometry and phase resolved spectra from Kitt Peak National Observatory and Lowell Observatory, we…

Solar and Stellar Astrophysics · Physics 2016-07-27 Zhao Guo , Douglas R. Gies , Rachel A. Matson , Antonio García Hernández

Using TESS 20-sec 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 $\delta$ Scuti star with pulsations over the range 32-41 d$^{-1}$; this…

We announce the discovery of pulsations in HD 23642, the only bright eclipsing system in the Pleiades, based on light curves from the Transiting Exoplanet Survey Satellite (TESS). We measure 46 pulsation frequencies and attribute them to…

Solar and Stellar Astrophysics · Physics 2023-01-25 John Southworth , Simon J. Murphy , Kresimir Pavlovski

Theories of stellar convective core overshoot can be examined through analysis of pulsating stars. Better accuracy can be achieved by obtaining external constraints such as those provided by observing pulsating stars in eclipsing binary…

Solar and Stellar Astrophysics · Physics 2022-02-16 Padraic Odesse , Catherine Lovekin

We present multi-epoch spectroscopy of "heartbeat stars," eccentric binaries with dynamic tidal distortions and tidally induced pulsations originally discovered with the Kepler satellite. Optical spectra of six known heartbeat stars using…

Solar and Stellar Astrophysics · Physics 2015-06-23 Rachel A. Smullen , Henry A. Kobulnicky

The recently launched NASA Transiting Exoplanet Survey Satellite (TESS) mission is going to collect lightcurves for a few hundred million of stars and we expect to increase the number of pulsating stars to analyze compared to the few…

Solar and Stellar Astrophysics · Physics 2018-11-30 L. Bugnet , R. A. García , G. R. Davies , S. Mathur , O. J. Hall , B. M. Rendle

We present results of a continuation of our Transiting Exoplanet Survey Satellite (TESS) search for short-period pulsations in compact stellar objects observed during Years 2 and 4 of the TESS mission that targeted the northern ecliptic…

Solar and Stellar Astrophysics · Physics 2024-03-06 A. S. Baran , S. Charpinet , R. H. Østensen , M. D. Reed , V. Van Grootel , C. Lyu , J. H. Telting , P. Németh

Some pulsating stars are good clocks. When they are found in binary stars, the frequencies of their luminosity variations are modulated by the Doppler effect caused by orbital motion. For each pulsation frequency this manifests itself as a…

Solar and Stellar Astrophysics · Physics 2015-06-04 Hiromoto Shibahashi , Donald W. Kurtz

We report the discovery of four new pulsating subdwarf B (sdBV) stars from Campaign 7 of the Kepler spacecraft's K2 mission. EPICs 215776487, 217280630, 218366972, and 218717602 are all gravity (g)-mode pulsators and we also detect two…

Solar and Stellar Astrophysics · Physics 2021-09-01 M. D. Reed , A. J. Slayton , A. S. Baran , J. H. Telting , R. H. Ostensen , C. S. Jeffery , M. Uzundag , S. Sanjayan

Binaries play key roles in determining stellar parameters and exploring stellar evolution models. We build a catalog of 88 eclipsing binaries with spectroscopic information, taking advantage of observations from both the Large Sky Area…

Solar and Stellar Astrophysics · Physics 2020-08-19 Fan Yang , Richard J. Long , Su-Su Shan , Bo Zhang , Rui Guo , Yu Bai , ZhongRui Bai , KaiMing Cui , Song Wang , Ji-Feng Liu

The satellite Planetary Transits and Oscillations of stars (PLATO), due to be launched late 2026, will provide us with an unprecedented sample of light curves of solar-type stars that will exhibit both solar-type oscillations and signatures…

Solar and Stellar Astrophysics · Physics 2023-12-06 Sylvain N. Breton , Antonino F. Lanza , Sergio Messina

The Kepler mission has provided high-accurate photometric data in a long time span for more than two hundred thousands stars, looking for planetary transits. Among the detected candidates, the planetary nature of around 15% has been…

Earth and Planetary Astrophysics · Physics 2015-04-15 J. Lillo-Box , D. Barrado , L. Mancini , Th. Henning , P. Figueira , S. Ciceri , N. Santos

The NASA's Transiting Exoplanet Survey Satellite (TESS) is about to provide full-frame images of almost the entire sky. The amount of stellar data to be analysed represents hundreds of millions stars, which is several orders of magnitude…

Solar and Stellar Astrophysics · Physics 2019-04-24 L. Bugnet , R. A. García , S. Mathur , G. R. Davies , O. J. Hall , M. N. Lund , B. M. Rendle

During the last two years we have received long time-series photometric observations of bright (V mag < 8) main-sequence A- and B-type stars observed by the NASA TESS spacecraft and the Austria-Poland-Canada BRITE satellites. Using TESS…

The realistic simulation of variable star populations is fundamental to determine the selection function and contamination in existing and upcoming multi-epoch surveys. We present \ellisa, a simulator that produces an ensemble of mock light…

Hundreds of candidate hybrid pulsators of intermediate type A-F were revealed by the recent space missions. Hybrid pulsators allow to study the full stellar interiors, where p- and g-modes are simultaneously excited. The true hybrid stars…

Eclipsing binaries are vital for directly determining stellar parameters without reliance on models or scaling relations. Spectroscopically derived parameters of detached and semi-detached binaries allow us to determine component masses…

Solar and Stellar Astrophysics · Physics 2017-11-15 Rachel A. Matson , Douglas R. Gies , Zhao Guo , Stephen J. Williams

Gamma Doradus stars (hereafter gamma Dor stars) are gravity-mode pulsators of spectral type A or F. Such modes probe the deep stellar interior, offering a detailed fingerprint of their structure. Four-year high-precision space-based Kepler…

We present the results of time-series photometric analysis of 15106 A-K type stars observed by the Kepler space mission. We identified 513 new rotational variables and measured their starspot rotation periods as a function of spectral type…

Solar and Stellar Astrophysics · Physics 2018-12-10 Sowgata Chowdhury , Santosh Joshi , Chris A. Engelbrecht , Peter De Cat , Yogesh. C. Joshi , K. T. Paul

We use four years of Kepler photometry to study the non-eclipsing spectroscopic binary KIC 10080943. We find both components to be $\gamma$ Doradus/$\delta$ Scuti hybrids, which pulsate in both p and g modes. We present an analysis of the g…

Solar and Stellar Astrophysics · Physics 2015-10-14 M. A. Keen , T. R. Bedding , S. J. Murphy , V. S. Schmid , C. Aerts , A. Tkachenko , R. -M. Ouazzani , D. W. Kurtz