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We present our analyses of 15 months of Kepler data on KIC 10139564. We detected 57 periodicities with a variety of properties not previously observed all together in one pulsating subdwarf B star. Ten of the periodicities were found in the…

The recently discovered subdwarf B (sdB) pulsator KIC7668647 is one of the 18 pulsating sdB stars detected in the Kepler field. It features a rich g-mode frequency spectrum, with a few low-amplitude p-modes at short periods. We use new…

太阳与恒星天体物理 · 物理学 2014-11-05 J. H. Telting , A. S. Baran , P. Nemeth , R. H. Ostensen , T. Kupfer , S. Macfarlane , U. Heber , C. Aerts , S. Geier

KIC 10001893 is a V1093 Her type pulsating subdwarf-B star, which was observed extensively by the Kepler spacecraft. It was a part of the survey searching for compact pulsators in the Kepler field of view. An amplitude spectrum of the star…

太阳与恒星天体物理 · 物理学 2021-06-09 M. Uzundag , A. S. Baran , R. H. Østensen , M. D. Reed , J. H. Telting , B. K. Quick

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…

太阳与恒星天体物理 · 物理学 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

KIC10001893 is one out of 19 subdwarf-B (sdB) pulsators observed by the Kepler spacecraft in its primary mission. In addition to tens of pulsation frequencies in the g-mode domain, its Fourier spectrum shows three weak peaks at very low…

地球与行星天体物理 · 物理学 2014-11-05 R. Silvotti , S. Charpinet , E. Green , G. Fontaine , J. H. Telting , R. H. Ostensen , V. Van Grootel , A. S. Baran , S. Schuh , L. Fox Machado

The recently discovered subdwarf B (sdB) pulsator KIC11558725 features a rich g-mode frequency spectrum, with a few low-amplitude p-modes at short periods, and is a promising target for a seismic study aiming to constrain the internal…

We analyse three years of nearly-continuous Kepler spacecraft short cadence observations of the pulsating subdwarf B star KIC 3527751. We detect a total of 251 periodicities, most in the g-mode domain, but some where p-modes occur,…

太阳与恒星天体物理 · 物理学 2015-05-27 H. M. Foster , M. D. Reed , J. H. Telting , R. H. Ostensen , A. S. Baran

We present the first detection of a rotationally affected series consisting of 36 consecutive high-order sectoral dipole gravity modes in a slowly pulsating B (SPB) star. The results are based on the analysis of four years of virtually…

太阳与恒星天体物理 · 物理学 2016-08-08 P. I. Pápics , A. Tkachenko , C. Aerts , T. Van Reeth , K. De Smedt , M. Hillen , R. Oestensen , E. Moravveji

We report seismic analyses of five pulsating subdwarf B (sdBV) stars observed during Kepler's K2 mission, each with a white dwarf companion. We find three of the five to be g-mode-dominated hybrid pulsators. For the other two, we only…

太阳与恒星天体物理 · 物理学 2025-06-06 M. D. Reed , A. S. Baran , J. H. Telting , R. H. Ostensen , C. S. Jeffery , Y. Gaibor

We present five new pulsating subdwarf B (sdB) stars discovered by the Kepler spacecraft during the asteroseismology survey phase. We perform time-series analysis on the nearly continuous month-long Kepler datasets of these 5 objects; these…

We present the discovery of nonradial pulsations in five hot subdwarf B (sdB) stars based on 27 days of nearly continuous time-series photometry using the Kepler spacecraft. We find that every sdB star cooler than $\approx 27\,500\,$K that…

We have discovered a new rapidly oscillating Ap star among the Kepler Mission target stars, KIC 10195926. This star shows two pulsation modes with periods that are amongst the longest known for roAp stars at 17.1 min and 18.1 min,…

We present the discovery of nonradial pulsations in a hot subdwarf B star based on 30.5 days of nearly continuous time-series photometry using the \emph{Kepler} spacecraft. KIC 010139564 is found to be a short-period pulsator of the V361…

The Kepler spacecraft provides new opportunities to search for long term frequency and amplitude modulations of oscillation modes in pulsating stars. We ana- lyzed nearly two years of uninterrupted data obtained with this instrument on the…

太阳与恒星天体物理 · 物理学 2015-10-26 W. Zong , S. Charpinet , G. Vauclair

We present an analysis of oscillation mode variability in the hot B subdwarf star EPIC~220422705, a new pulsator discovered from $\sim78$~days of {\em K}2 photometry. The high-quality light curves provide a detection of 66 significant…

太阳与恒星天体物理 · 物理学 2022-07-27 Xiao-Yu Ma , Weikai Zong , Jian-Ning Fu , M. D. Reed , Jiaxin Wang , Stephane Charpinet , Jie Su

Massive stars are important for the chemical enrichment of the universe. Since internal mixing processes influence their lives, it is very important to place constraints on the corresponding physical parameters, such as core overshooting…

太阳与恒星天体物理 · 物理学 2014-10-08 P. I. Pápics , E. Moravveji , C. Aerts , A. Tkachenko , S. A. Triana , S. Bloemen , J. Southworth

KIC 10553698A is a hot pulsating subdwarf B (sdB) star observed by the Kepler satellite. It exhibits dipole (l = 1) and quadrupole (l = 2) gravity modes with a clear period spacing structure. The seismic properties of the KIC 10553698A…

太阳与恒星天体物理 · 物理学 2016-12-21 Hamed Ghasemi , Ehsan Moravveji , Conny Aerts , Hossein Safari , Maja Vučković

KIC 7341653 is one of several late-type M dwarfs observed in the main mission of Kepler with peculiar infrared colors placing them in the domain of suspected young stellar objects (YSO). It is likely associated with a powerful X-ray emitter…

太阳与恒星天体物理 · 物理学 2017-08-30 Valeri V. Makarov , Alexey Goldin

The survey phase of the Kepler Mission includes a number of hot subdwarf B (sdB) stars to search for nonradial pulsations. We present our analysis of two sdB stars that are found to be g-mode pulsators of the V1093 Her class. These two…

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…

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