Results 11 to 20 of about 2,888,460 (154)

The OGLE Collection of Variable Stars. Over 2600 Delta Scuti Stars in the Small Magellanic Cloud [PDF]

Acta Astronomica, 2022
BEFORE_PUBLICATION
Soszyński, Igor, Udalski, Andrzej, Skowron, Jan, Pietrukowicz, Paweł, Szymański, Michał, Poleski, Radosław, Skowron, Dorota, Kozłowski, Szymon, Mróz, Przemysław, Iwanek, Patryk, Wrona, Marcin, Ulaczyk, K., Rybicki, Krzysztof, Gromadzki, Mariusz   +13 more
openaire   +4 more sources

TIC 5724661: A Long-period Binary with a Pulsating sdB Star and δ Scuti Variable [PDF]

The Astrophysical Journal, 2022
Abstract Using TESS 20 s cadence data, we have discovered an unusual combination of pulsating stars in what we infer to be a binary system. The binary consists of a standard δ Scuti star with pulsations over the range 32–41 day−1; this is in a likely wide orbit with a hot subdwarf-B (sdB) star, which itself has a large-amplitude p-mode ...
Rahul Jayaraman, Saul A. Rappaport, Lorne Nelson, Donald W. Kurtz, George Dufresne, Gerald Handler, Abdel Senhadji, David W. Latham, George Zhou, Allyson Bieryla, George R. Ricker   +10 more
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FREQUENCY ANALYSIS OF DELTA SCUTI VARIABLE STARS. I.

Odessa Astronomical Publications, 2017
The Fourier analyses are performed for photoelectric observations of two δ Scuti stars V567 Oph and KU Cen. It is shown that V567 Oph is a multiperiodic star and KU Cen has one main period.
V. P. Bezdenezhnyi
doaj   +5 more sources

TESS Observations of the Pleiades Cluster: A Nursery for δ Scuti Stars [PDF]

The Astrophysical Journal Letters, 2023
We studied 89 A- and F-type members of the Pleiades open cluster, including five escaped members. We measured projected rotational velocities ( $v\sin i$ ) for 49 stars and confirmed that stellar rotation causes a broadening of the main sequence in the ...
Timothy R. Bedding, Simon J. Murphy, Courtney Crawford, Daniel R. Hey, Daniel Huber, Hans Kjeldsen, Yaguang Li, Andrew W. Mann, Guillermo Torres, Timothy R. White, George Zhou   +10 more
doaj   +2 more sources

The OGLE Collection of Variable Stars. Over 15 000 Delta Scuti Stars in the Large Magellanic Cloud [PDF]

Acta Astronomica, 2023
We present the OGLE collection of delta Scuti stars in the Large Magellanic Cloud and in its foreground. Our dataset encompasses a total of 15 256 objects, constituting the largest sample of extragalactic delta Sct stars published so far. In the case of 12 delta Sct pulsators, we detected additional eclipsing or ellipsoidal variations in their light ...
Soszyński, I., Pietrukowicz, P., Udalski, A., Skowron, J., Szymański, M.K., Poleski, R., Skowron, D.M., Kozłowski, S., Mróz, P., Iwanek, P., Wrona, M., Ulaczyk, K., Rybicki, K., Gromadzki, M., Mróz, M.   +14 more
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Spectroscopy of a chemically peculair delta scuti-type star: 60 tau [PDF]

Cumhuriyet Science Journal, 2020
In this study, a detailed spectroscopic analysis of 60 Tau is presented. 60 Tau is a Delta Scuti-type pulsating variable and it is also a metallic-lined (Am) star.
Filiz Kahraman Aliçavuş
doaj   +2 more sources

Multisite Observations of δ Scuti Stars 7 Aql and 8 Aql (a New δ Scuti Variable): The Twelfth STEPHI Campaign in 2003 [PDF]

The Astronomical Journal, 2007
We present an analysis of the pulsation behaviour of the Delta Scuti stars 7 Aql (HD 174532) and 8 Aql (HD 174589) -- a new variable star -- observed in the framework of STEPHI XII campaign during 2003 June--July. 183 hours of high precision photometry were acquired by using four-channel photometers at three sites on three continents during 21 days ...
Fox Machado, L., Michel, Eric, Pérez Hernéndez, F., Peña, J. H., Li, Z.-P., Chevreton, Michel, Belmonte, J. A., Alvarez, M., Parrao, L., Dupret, Marc-Antoine, Pau, Sylvain, Fernandez, Andrée, Michel, Patrick, Michel, R., Pani, A.   +14 more
openaire   +6 more sources

Validating Gaia DR3 Pulsating Variable Classifications with TESS: Building Reliable δ Scuti and γ Doradus Stars Catalogs (In Progress)* [PDF]

Research Notes of the AAS
Abstract Gaia DR3 revealed 748,058 pulsating variable stars of mixed DSCT∣GDOR∣SXPHE types. This project undertakes a comprehensive examination to validate and distinguish these stars using Transiting Exoplanet Survey Satellite data. Aiming for reliable catalogs of bona fide δ Scuti and γ Doradus stars, I have validated 1715 δ Scuti ...
Zhou, Ai-Ying
openaire   +3 more sources

Position and Time Determination Without Prior State Knowledge via Onboard Optical Observations of Delta Scuti Variable Stars [PDF]

The Journal of the Astronautical Sciences
We 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, Ishaan Bansal, Clark Davis, Siegfried Eggl   +3 more
core   +4 more sources

A New Catalog of 100,000 Variable TESS A-F Stars Reveals a Correlation between δ Scuti Pulsator Fraction and Stellar Rotation [PDF]

The Astrophysical Journal
δ 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, Marc Hon, Daniel Huber, Daniel R. Hey, Timothy R. Bedding, Simon J. Murphy   +5 more
doaj   +2 more sources