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Related papers: Asteroseismology of sz lyn using multi-band high t…

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The helium-rich hot subdwarf LS IV -14 116 shows remarkably high surface abundances of zirconium, yttrium, strontium, and germanium, indicative of strong chemical stratification in the photosphere. It also shows photometric behaviour…

Solar and Stellar Astrophysics · Physics 2014-11-25 C. Simon Jeffery , Amir Ahmad , Naslim Neelamkodan , Wolfgang Kerzendorf

We present a detailed abundance study of 11 RR Lyrae ab-type variables: AS Vir, BS Aps, CD Vel, DT Hya, RV Oct, TY Gru, UV Oct, V1645 Sgr, WY Ant, XZ Aps, and Z Mic.High resolution and high S/N echelle spectra of these variables were…

Solar and Stellar Astrophysics · Physics 2015-05-30 Bi-Qing For , Christopher Sneden , George W. Preston

The high-precision and long-duration photometry provided by the $Kepler$ mission has greatly advanced frequency analyses of a large number of pulsating stars, a fundamental step in asteroseismology. For $\delta$ Scuti stars, analyses are…

Solar and Stellar Astrophysics · Physics 2025-07-25 Zilu Yang , Jianning Fu , Xuan Wang , Yanqi Mo , Weikai Zong

Space-based photometry reveals regular high-frequency patterns in many young $\delta$ Scuti stars. These pulsations provide a powerful means of inferring stellar properties, particularly ages, for young $\delta$ Scuti stars for which…

Solar and Stellar Astrophysics · Physics 2026-03-26 Anuj Gautam , Simon J. Murphy , Timothy R. Bedding

Pulsations and binarity are both common features of massive stars. The study of pulsating massive stars in eclipsing binary systems hold great potential for constraining stellar structure and evolution theory. However, prior to the all-sky…

Solar and Stellar Astrophysics · Physics 2022-04-13 John Southworth , Dominic M. Bowman

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

We present the detailed analysis of a new hybrid (p- and g-mode) sdB pulsator, TIC441725813 (TYC 4427-1021-1), discovered and monitored by TESS over 670 days. The TESS light curves available for this star were analysed using prewhitening…

Solar and Stellar Astrophysics · Physics 2024-10-01 Wenchao Su , Stéphane Charpinet , Marilyn Latour , Weikai Zong , Elizabeth M Green , Gang Li

We analyse the OGLE-IV photometry of the first overtone and double-mode RR Lyrae stars (RRc/RRd) in the two fields towards the Galactic bulge observed with high cadence. In 27 per cent of RRc stars we find additional non-radial mode, with…

Solar and Stellar Astrophysics · Physics 2015-09-01 H. Netzel , R. Smolec , P. Moskalik

We assess the potential of asteroseismology for determining the fundamental properties of individual $\delta$ Scuti stars. We computed a grid of evolution and adiabatic pulsation models using the Yale Rotating Evolution Code to study the…

Astrophysics · Physics 2009-11-07 M. R. Templeton , S. Basu , P. Demarque

BE Lyncis (BE Lyn) is a well-studied high-amplitude $\delta$ Scuti variable star (HADS). Recently, Niu et al. (2026) analyzed a 39-year baseline of times of maximum light of BE Lyn, reporting that it is the most eccentric binary known ($e…

Solar and Stellar Astrophysics · Physics 2026-03-26 Pranav Nagarajan , Kareem El-Badry , Thomas J. Maccarone , Giuliano Iorio , Sara Rastello , Johanna Müller-Horn

In this article we present a first discovery of non radial pulsations in both components of the Herbig Ae spectroscopic binary star RS Cha. The binary was monitored in quasi-continuous observations during 14 observing nights (Jan 2006) at…

Astrophysics · Physics 2009-11-13 T. Böhm , W. Zima , C. Catala , E. Alecian , K. Pollard , D. Wright

For $\delta$ Scuti star CoRoT 102749568, 52 independent frequencies were obtained by Papar$\acute{o}$ et al. 2013. We find that there are 4 multiplets and 8 doublets with nearly equal split caused by rotation. Differential rotation is…

Solar and Stellar Astrophysics · Physics 2016-09-26 X. H. Chen , Y. Li

A high-accuracy multisite campaign was carried out from 2002 January to May with a photometric coverage of 398 hours at five observatories. The concentration on a few selected sites gives better consistency and accuracy than collecting…

Aims: We present a photometric study of the deeply eclipsing SW Sex-type nova-like cataclysmic variable star BH Lyn Methods: Time-resolved V-band CCD photometry was obtained for seven nights between 1999 and 2004. Results: We determined 11…

Astrophysics · Physics 2007-05-23 V. Stanishev , Z. Kraicheva , V. Genkov

The known beta Cephei star HD 180642 was observed by the CoRoT satellite in 2007. From the very high-precision light curve, its pulsation frequency spectrum could be derived for the first time (Degroote and collaborators). In this paper, we…

The study of pulsating stars in eclipsing binaries holds the promise of combining two different ways of measuring the physical properties of a star to obtain improved constraints on stellar theory. Gravity (g) mode pulsations such as those…

Solar and Stellar Astrophysics · Physics 2022-08-03 John Southworth , Timothy Van Reeth

Asteroseismology, the study of stellar vibrations, is a method which can probe the structure deformation and internal rotation of stars. Salient among the seismic inferences of rotation from TESS observations are TIC 408165734, whose…

Solar and Stellar Astrophysics · Physics 2025-05-20 S. K. Panda , S. Hanasoge

We present 3.6 to 70 {\mu}m Spitzer photometry of 154 weak-line T Tauri stars (WTTS) in the Chamaeleon, Lupus, Ophiuchus and Taurus star formation regions, all of which are within 200 pc of the Sun. For a comparative study, we also include…

We report the first asteroseismic results obtained with the Hertzsprung SONG Telescope from an extensive high-precision radial-velocity observing campaign of the subgiant muHerculis. The data set was collected during 215 nights in 2014 and…

Massive binaries play significant roles in many fields. Identification of massive stars, particularly massive binaries, is of great importance. In this paper, by adopting the technique of measuring the equivalent widths of several spectral…

Solar and Stellar Astrophysics · Physics 2022-02-16 Yanjun Guo , Jiao Li , Jianping Xiong , Jiangdan Li , Luqian Wang , Heran Xiong , Feng Luo , Yonghui Hou , Chao Liu , Zhanwen Han , Xuefei Chen