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Pulsating subdwarf B stars oscillate in short-period $p$-modes or long-period $g$-modes. HS 0702 + 6043 is one of currently three objects known to show characteristics of both types and hence is classified as hybrid pulsator. We briefly…

Astrophysics · Physics 2008-12-31 R. Lutz , S. Schuh , R. Silvotti , R. Kruspe , S. Dreizler

We present the results of the asteroseismic analysis of the red-giant star KIC 4351319 (TYC 3124-914-1), observed for 30 days in short-cadence mode with the Kepler satellite. The analysis has allowed us to determine the large and small…

The 76 frequencies determined from Kepler measurements of the A-type star KIC 9700322 can be understood in a rather simple way as the radial fundamental and first overtone radial modes, a nonradial \ell = 2 quintuplet, stellar rotation and…

Solar and Stellar Astrophysics · Physics 2015-03-19 Michel Breger

We report the identification of 61.45 d^-1 (711.2 mu Hz) oscillations, with amplitudes of 62.6-mu mag, in KIC 4768731 (HD 225914) using Kepler photometry. This relatively bright (V=9.17) chemically peculiar star with spectral type A5 Vp…

In the first spectroscopic campaign for a PG 1716 variable (or long-period pulsating subdwarf B star), we succeeded in detecting velocity variations due to g-mode pulsations at a level of 1.0-1.5 km/s.The observations were obtained during…

We present an analysis of three new pulsating subdwarf B stars discovered in the SuperWASP archive. Two of the stars, J1938+5609 and J0902-0720, are p-mode pulsators; J1938+5609 shows a pulsation at 231.62 d$^{-1}$ ($P=373$ s; 2681 $\mu$Hz)…

Solar and Stellar Astrophysics · Physics 2017-01-18 Daniel L. Holdsworth , Roy H. Østensen , Barry Smalley , John H. Telting

In this paper, we present an analysis of the pulsating behavior of $Kepler$ target KIC 10284901. The Fourier transform of the high-precision light curve reveals seven independent frequencies for its light variations. Among them, the first…

Solar and Stellar Astrophysics · Physics 2019-07-08 Tao-Zhi Yang , Ali Esamdin

We present a new asteroseismic analysis of KIC~6048106, a \textit{Kepler} Algol-type eclipsing binary star in a circularized orbit with $P_\rm{orb}$=1.559361$\pm$0.000036~d. Based on a physical model for the binary and its corresponding set…

Solar and Stellar Astrophysics · Physics 2018-11-20 Anya Samadi Gh. , Patricia Lampens , Davood M. Jassur

KIC 10526294 is a very slowly rotating and slowly pulsating late B-type star. Its 19 consecutive dipole gravity modes constitute a series with almost constant period spacing. This unique collection of identified modes probes the near-core…

Solar and Stellar Astrophysics · Physics 2015-07-22 Ehsan Moravveji , Conny Aerts , Peter I. Papics , Santiago Andres Triana , Bram Vandoren

V391 Peg (HS2201+2610) is an extreme horizontal branch subdwarf B (sdB) star, it is an hybrid pulsator showing p- and g-mode oscillations, and hosts a 3.2/sini M_Jup planet at an orbital distance of about 1.7 AU. In order to improve the…

Solar and Stellar Astrophysics · Physics 2015-05-19 Roberto Silvotti , Suzanna Randall , Vik S. Dhillon , Tom R. Marsh , Chris D. Savoury , Sonja Schuh , Gilles Fontaine , Pierre Brassard

This paper examines the 46 frequencies found in the Delta Sct star KIC 8054146 involving a frequency spacing of exactly 2.814 c/d (32.57 microHz), which is also a dominant low-frequency peak near or equal to the rotational frequency. These…

Solar and Stellar Astrophysics · Physics 2015-06-16 M. Breger , P. Lenz , A. A. Pamyatnykh

2M1938+4603 (KIC 9472174) displays a spectacular light curve dominated by a strong reflection effect and rather shallow, grazing eclipses. The orbital period is 0.126 days, the second longest period yet found for an eclipsing sdB+dM, but…

We present the analysis of KIC 7760680, the rotating Slowly Pulsating B-type star identified in the Kepler photometry. The oscillation spectrum of the star exhibits a series of 36 frequencies which are quasi-equally spaced in period. We…

Solar and Stellar Astrophysics · Physics 2017-11-08 Wojciech Szewczuk , Jadwiga Daszyńska-Daszkiewicz , Przemysław Walczak

KIC 7955301 is a hierarchical triple system with eclipse timing and depth variations discovered by the Kepler mission. It is composed of a non-eclipsing primary star at the bottom of the red giant branch on a 209-day orbit with a K/G-type…

We present results of a multi-site photometric campaign on the high-amplitude $\delta$\,Scuti star KIC\,6382916 in the {\it Kepler} field. The star was observed over a 85-d interval at five different sites in North America and Europe during…

KIC 10685175 (TIC 264509538) was discovered to be a rapidly oscillating Ap star from {\it Kepler} long cadence data using super-Nyquist frequency analysis. It was re-observed by TESS with 2-min cadence data in Sectors 14 and 15. We analyzed…

Solar and Stellar Astrophysics · Physics 2020-08-14 Fangfei Shi , Donald Kurtz , Hideyuki Saio , Jianning Fu , Huawei Zhang

In this paper, we present a detailed analysis of the light variation of KIC 5623923 using high-precision time-series data from the $Kepler$ mission. The analysis reveals this target is an eclipsing binary system with $\delta$ Scuti type…

Solar and Stellar Astrophysics · Physics 2025-11-26 Tao-Zhi Yang , Zhao-Yu Zuo , Shi-ping Guo , Xu Ding , Hao-zhi Wang , Shahidin Yaqup , Ali Esamdin

Context: Several hundred candidate hybrid pulsators of type A-F have been identified from space-based observations. Their large number allows both statistical analyses and detailed investigations of individual stars. This offers the…

We present the analysis of K2 short cadence data of the rapidly oscillating Ap (roAp) star, 33 Librae (HD 137949). The precision afforded to the K2 data allow us to identify at least 11 pulsation modes in this star, compared to the three…

Solar and Stellar Astrophysics · Physics 2018-08-08 Daniel L. Holdsworth , Margarida S. Cunha , Hiromoto Shibahashi , Donald W. Kurtz , Dominic M. Bowman

The short-period (P $\approx1.7$ d), Algol-type eclipsing binary KIC 7385478 consists of an F-type primary star ($M_1 \approx 1.71M_{\odot}$) and an evolved K-type secondary ($M_2 \approx 0.37M_{\odot}$) (Ozdarcan \& Ali Dal 2017). We study…

Solar and Stellar Astrophysics · Physics 2019-09-18 Zhao Guo , Gang Li