Results 81 to 90 of about 1,216 (137)
Delta Scuti stars in stellar systems: on the variability of HD 220392 and HD 220391
, 2000 9 pages, 5 figures, accepted for publication in A& ...
Lampens, P. +2 more
openaire +2 more sources
Population of the lower part of the instability strip: Delta Scuti stars and dwarf Cepheids (or AI Velorum) [PDF]
Some of the properties of the atmospheric variations in delta Scuti stars were investigated with emphasis on the amplitude and the shape of both light curves and radial velocity curves.
Auvergne, M. +3 more
core +1 more source
The Rotation Properties of δ Sct and γ Dor Stars
The Astrophysical JournalBased on the LAMOST spectroscopy and TESS time-series photometry, we have obtained a main-sequence star sample of δ Scuti and γ Doradus stars. The sample includes 1534 δ Sct stars, 367 γ Dor stars, 1703 δ Sct ∣ γ Dor stars, 270 γ Dor ∣ δ Sct stars, along
Jiyu Wang +4 more
doaj +1 more source
Stellar Variability toward the Galactic Open Cluster NGC 7209
The Astrophysical JournalWe present the analysis of stellar variability in an open cluster NGC 7209 using optical V -band CCD photometric observations. Out of 4499 stars in our study, we detected 284 candidate variables, including one identified previously.
Dorothy M. Mwanzia +10 more
doaj +1 more source
The Journal of the Astronautical SciencesWe present a navigation concept for solving the lost in space and time problem using optical observations of $δ$ Scuti variable stars. Only a small number of techniques exist that allow a spacecraft to recover from being lost in both space and time, which can be caused by a failure of the onboard clock and navigation systems. Optical observations of $δ$
Linyi Hou +3 more
openaire +2 more sources
Multimode δ Sct stars from the Zwicky Transient Facility Survey
The Astrophysical Journal Supplement SeriesWe obtain the largest catalog of multimode δ Sct stars in the northern sky to date using the Zwicky Transient Facility (ZTF) Data Release 20. The catalog includes 2254 objects, of which 2181 are new to our study.
Qi Jia +5 more
doaj +1 more source
Tidally Distorted Stars Are Triaxial Pulsators
The Astrophysical JournalStars in close binaries are tidally distorted, and this has a strong effect on their pulsation modes. We compute the mode frequencies and geometries of tidally distorted stars using perturbation theory, accounting for the effects of the Coriolis force ...
Jim Fuller +4 more
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The Astronomical JournalHIP 65426 hosts a young giant planet that has become the first exoplanet directly imaged with JWST. Using time-series photometry from the Transiting Exoplanet Survey Satellite (TESS), we classify HIP 65426 as a high-frequency δ Scuti pulsator with a ...
Aldo G. Sepulveda +6 more
doaj +1 more source
Monoperiodic $\delta$ Scuti star UY Cam: an analogue of SX Phe and RR Lyr-type variables
, 2003 We present the results of a four-year photometric study of the high-amplitude $\delta$ Scuti star (HADS) UY Camelopardalis. Analyses on the available data from 1985 to 2003 show that UY Cam is monoperiodic. Fourier solutions for individual data sets do not reveal period changes in the star. Although forced parabolic fits to the $O-C$ residuals indicate
Zhou, A. -Y., Liu, Z. -L.
openaire +2 more sources
The Astrophysical Journalδ Scuti variables are found at the intersection of the classical instability strip and the main sequence on the Hertzsprung–Russell diagram. With space-based photometry providing millions of light curves of A-F type stars, we can now probe the occurrence
Keyan Gootkin +5 more
doaj +1 more source