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This year, a second generation of coronagraphs dedicated to high-contrast direct imaging of exoplanets is starting operations. Among them, SPHERE, installed at the focus of the UT3 Very Large Telescope, reaches unprecedented contrast ratios…

天体物理仪器与方法 · 物理学 2015-10-22 H. Le Coroller , M. Nowak , L. Arnold , K. Dohlen , T. Fusco , J. F. Sauvage , A. Vigan

Barycentric corrections made to the timing of Kepler observations, necessitated by variations in light arrival time at the satellite, break the regular time-sampling of the data -- the time stamps are periodically modulated. A consequence…

太阳与恒星天体物理 · 物理学 2015-06-12 Simon J. Murphy , Hiromoto Shibahashi , Donald W. Kurtz

We use asteroseismic data obtained by the NASA Kepler Mission to estimate the fundamental properties of more than 500 main-sequence and sub-giant stars. Data obtained during the first 10 months of Kepler science operations were used for…

Accurate stellar parameters and precise elemental abundances are vital pieces to correctly characterize discovered planetary systems, better understand planet formation, and trace galactic chemical evolution. We have performed a uniform…

太阳与恒星天体物理 · 物理学 2018-08-29 John M. Brewer , Debra A. Fischer

Cross correlation analyses of high resolution spectroscopic data have recently shown great success in directly detecting planetary signals and enabling the characterization of their atmospheres. One such technique aims to observe a system…

地球与行星天体物理 · 物理学 2021-06-30 Cam Buzard , Stefan Pelletier , Danielle Piskorz , Björn Benneke , Geoffrey Blake

The long-term monitoring and high photometric precision of the Kepler satellite will provide a unique opportunity to sound the stellar cycles of many solar-type stars using asteroseismology. This can be achieved by studying periodic changes…

太阳与恒星天体物理 · 物理学 2015-05-13 C. Karoff , T. S. Metcalfe , W. J. Chaplin , Y. Elsworth , H. Kjeldsen , T. Arentoft , D. Buzasi

The Kepler field hosts the best studied sample of field star rotation periods. However, due to Kepler's large 4" pixels, many of its light curves are at high risk of contamination from background sources. The new Kepler Bonus Background…

太阳与恒星天体物理 · 物理学 2025-06-05 Zachary R. Claytor , Jamie Tayar

Photometry from Kepler has revealed the presence of cool starspots on the surfaces of thousands of stars, presenting a wide range of spot morphologies and lifetimes. Understanding the lifetime and evolution of starspots across the main…

太阳与恒星天体物理 · 物理学 2014-08-25 James R. A. Davenport , Leslie Hebb , Suzanne L. Hawley

An accurate and precise Kepler Stellar Properties Catalog is essential for the interpretation of the Kepler exoplanet survey results. Previous Kepler Stellar Properties Catalogs have focused on reporting the best-available parameters for…

太阳与恒星天体物理 · 物理学 2020-06-04 Travis A. Berger , Daniel Huber , Jennifer L. van Saders , Eric Gaidos , Jamie Tayar , Adam L. Kraus

We used the Robo-AO laser adaptive optics system to image 99 main sequence and subgiant stars that have Kepler-detected asteroseismic signals. Robo-AO allows us to resolve blended secondary sources at separations as close as 0.15" that may…

The NASA Kepler mission is providing an unprecedented set of asteroseismic data. In particular, short-cadence lightcurves (~60s samplings), allow us to study solar-like stars covering a wide range of masses, spectral types and evolutionary…

The observational basis for asteroseismology is being dramatically strengthened, through more than two years of data from the CoRoT satellite, the flood of data coming from the Kepler mission and, in the slightly longer term, from dedicated…

太阳与恒星天体物理 · 物理学 2011-03-28 J. Christensen-Dalsgaard , G. Houdek

While the mission's primary goal was focused on exoplanet detection and characterization, Kepler made and continues to make extraordinary advances in stellar physics. Stellar rotation and magnetic activity are no exceptions. Kepler allowed…

太阳与恒星天体物理 · 物理学 2024-04-25 A. R. G. Santos , D. Godoy-Rivera , A. J. Finley , S. Mathur , R. A. García , S. N. Breton , A. -M. Broomhall

With long data sets available for asteroseismology from space missions, it is sometimes necessary to deal with time series that have large gaps. This is becoming particularly relevant for TESS, which is revisiting many fields on the sky…

天体物理仪器与方法 · 物理学 2023-03-29 Timothy R. Bedding , Hans Kjeldsen

Eclipsing binaries serve as a valuable source of stellar masses and radii that inform stellar evolutionary models and provide insight into additional astrophysical processes. The exquisite light curves generated by space-based missions such…

太阳与恒星天体物理 · 物理学 2016-05-25 Rachel A. Matson , Douglas R. Gies , Zhao Guo , Jerome A. Orosz

Research into light curves from stars (temporal variation of brightness) has completely changed how exoplanets are discovered or characterised. This study including star light curves from the Kepler dataset as a way to discover exoplanets…

地球与行星天体物理 · 物理学 2025-06-24 Krishna Chamarthy

The Kepler spacecraft is providing photometric time series with micro-magnitude precision for thousands of variable stars. The continuous time-series of unprecedented time span open up opportunities to study the pulsational variability in…

太阳与恒星天体物理 · 物理学 2011-11-08 K. Uytterhoeven , KASC WG#10

Radio-astronomical observations are increasingly contaminated by interference, and suppression techniques become essential. A powerful candidate for interference mitigation is adaptive spatial filtering. We study the effect of spatial…

天体物理学 · 物理学 2014-10-13 Amir Leshem , Alle-Jan van der Veen

Kepler has revolutionized the study of transiting planets with its unprecedented photometric precision on more than 150,000 target stars. Most of the transiting planet candidates detected by Kepler have been observed as long-cadence targets…

地球与行星天体物理 · 物理学 2015-06-22 Ellen M. Price , Leslie A. Rogers

Even though the original Kepler mission ended due to mechanical failures, the Kepler satellite continues to collect data. Using classification models, we can understand the features exoplanets possess and then use those features to…

地球与行星天体物理 · 物理学 2021-01-08 Rohan Saha