Results 21 to 30 of about 1,216 (137)

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   +4 more sources

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

Acta Astronomica, 2023
We present the first-ever collection of delta Scuti stars found over the entire area of the Small Magellanic Cloud (SMC). The sample consists of 2810 variables of which over 2600 objects belong to the SMC while the remaining stars are most likely members of the Milky Way's halo.
Soszyński, I., Udalski, A., Skowron, J., Pietrukowicz, P., Szymański, M.K., Poleski, R., Skowron, D.M., Kozłowski, S., Mróz, P., Iwanek, P., Wrona, M., Ulaczyk, K., Rybicki, K., Gromadzki, M.   +13 more
openaire   +2 more sources

FREQUENCY ANALYSIS OF DELTA SCUTI VARIABLE STARS. II.

Odessa Astronomical Publications, 2017
The Fourier analyses performed for photoelectric observations of two delta Scuti stars V1162 Ori and AV Cet show that these stars are multiperiodic with most significant frequencies identified as radial mode overtones and their linear combinations.
V. P. Bezdenezhnyi
doaj   +1 more source

The EPOCH Project: I. Periodic variable stars in the EROS-2 LMC database [PDF]

, 2014
The EPOCH (EROS-2 periodic variable star classification using machine learning) project aims to detect periodic variable stars in the EROS-2 light curve database. In this paper, we present the first result of the classification of periodic variable stars
Bailer-Jones, Coryn A. L., Byun, Yong-Ik, Chang, Seo-Won, Kim, Dae-Won, Marquette, Jean-Baptiste, Protopapas, Pavlos, Shin, Min-Su   +6 more
core   +1 more source

Are the stars of a new class of variability detected in NGC~3766 fast rotating SPB stars? [PDF]

, 2014
A recent photometric survey in the NGC~3766 cluster led to the detection of stars presenting an unexpected variability. They lie in a region of the Hertzsprung-Russell (HR) diagram where no pulsation are theoretically expected, in between the $\delta ...
Dupret, M. -A., Eggenberger, P., Montalbán, J., Reese, D. R., Salmon, S. J. A. J.   +4 more
core   +2 more sources

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

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   +1 more source

Close frequency pairs in Delta Scuti stars [PDF]

, 2002
The majority of the well-studied Delta Scuti stars show frequency pairs in the power spectra with frequency separations less than 0.06 c/d(0.7 microHz) as well as amplitude variability.
Bischof, K. M., Breger, M.
core   +2 more sources

Asteroseismic Determination of Stellar Rotation: On Synchronization in the Close Eclipsing Binaries AB Cas and OO Dra

The Astrophysical Journal, 2023
A star’s rotation rate is difficult to estimate without surface inhomogeneities such as dark or bright spots. This paper presents asteroseismic results to determine the rotation rates of δ Sct-type pulsating primary stars in two eclipsing binary systems,
Seung-Lee Kim
doaj   +1 more source

The first high-amplitude delta Scuti star in an eclipsing binary system [PDF]

, 2007
We report the discovery of the first high-amplitude delta Scuti star in an eclipsing binary, which we have designated UNSW-V-500. The system is an Algol-type semi-detached eclipsing binary of maximum brightness V = 12.52 mag.
Ashley, M. C. B., Christiansen, J. L., Derekas, A., Hamacher, D. W., Hidas, M. G., Kiss, L. L., Webb, J. K.   +6 more
core   +2 more sources

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

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
openaire   +2 more sources