Results 101 to 110 of about 224 (157)

Multimode δ Sct stars from the Zwicky Transient Facility Survey

The Astrophysical Journal Supplement Series
We 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, Xiaodian Chen, Shu Wang, Licai Deng, Yangping Luo, Qingquan Jiang   +5 more
doaj   +1 more source

Stellar Variability toward the Galactic Open Cluster NGC 7209

The Astrophysical Journal
We 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, Sneh Lata, W. P. Chen, Soumen Mondal, Geoffrey Okeng’o, John Buers, Samrat Ghosh, Athul Dileep, Arjav Jain, Alisher S. Hojaev, Santosh Joshi   +10 more
doaj   +1 more source

TESS-validated Gaia DR3 Pulsating Variables of δ Scuti and γ Doradus [PDF]

<p>Gaia Data Release 3 (Part 4 Variability) released 12.4 million variables, including 748,058 pulsating variable stars of mixed `DSCT|GDOR|SXPHE' types among the variability classification results of all classifiers -- 9,976,881 objects (in the ...
Zhou, Ai-Ying
core   +1 more source

Tidally Distorted Stars Are Triaxial Pulsators

The Astrophysical Journal
Stars 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, Saul Rappaport, Rahul Jayaraman, Don Kurtz, Gerald Handler   +4 more
doaj   +1 more source

HIP 65426 is a High-frequency Delta Scuti Pulsator in Plausible Spin–Orbit Alignment with its Directly Imaged Exoplanet

The Astronomical Journal
HIP 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, Daniel Huber, Timothy R. Bedding, Daniel R. Hey, Simon J. Murphy, Zhoujian Zhang, Michael C. Liu   +6 more
doaj   +1 more source

Stellar Variability and Distance Indicators in the Near-infrared in Nearby Galaxies. II. Pulsating Stars in the Carina Dwarf Spheroidal

The Astronomical Journal
We present homogeneous, near-infrared ( JHK _s bands) time-series observations of the classical Carina dwarf spheroidal (dSph) galaxy to determine accurate and precise distances using the pulsating stars as standard candles.
Chow-Choong Ngeow, Anupam Bhardwaj, Prashant Nishad, Susmita Das   +3 more
doaj   +1 more source

Változócsillagok az instabilitási sávban és az óriás ágon = Variable stars in the instability strip and on the giant branch [PDF]

, 2008
Fő célunk pulzáló változócsillagok vizsgálata volt. Fotometriai és spektroszkópiai méréseket végeztünk hazai és külföldi műszerekkel, valamint felhasználtunk nemzetközi adatbázisokat.
Derekas, Alíz, Szabó, Gyula, Kiss, L. László, Vinkó, József, Fűrész, Gábor, Csák, Balázs, Szatmáry, Károly   +6 more
core  

A study of pulsation & rotation in a sample of A-K type stars in the Kepler field. [PDF]

Astrophys Space Sci, 2018
Chowdhury S, Joshi S, Engelbrecht CA, De Cat P, Joshi YC, Paul KT.   +5 more
europepmc   +1 more source

A Search for High-frequency Oscillations in TESS Cycle 7

The Astrophysical Journal Supplement Series
High-quality, short-cadence photometry from TESS enables the detection of rapid oscillators with unprecedented sensitivity. In this work, we conduct a homogeneous search for high-frequency variability using 20 s cadence light curves from TESS Cycle 7 ...
Guanda Huang, Xiaodian Chen, Shu Wang, Xiaobin Zhang, Licai Deng   +4 more
doaj   +1 more source

Citation-based clustering of publications using CitNetExplorer and VOSviewer. [PDF]

Scientometrics, 2017
van Eck NJ, Waltman L.
europepmc   +1 more source