Results 11 to 20 of about 201,996 (278)

Fundamental parameters of Be stars located in the seismology fields of COROT [PDF]

, 2005
In preparation for the COROT space mission, we determined the fundamental parameters (spectral type, temperature, gravity, vsini) of the Be stars observable by COROT in its seismology fields (64 Be stars).
A.-M. Hubert, Abt, Baglin, Ballereau, Ballereau, C. Neiner, Chauville, Cidale, Conti, Cunto, Denissenkov, E. Janot-Pacheco, Floquet, Frémat, Gray, Grevesse, Gulati, Halbedel, Heger, Hubeny, Hubert, J. Renan de Medeiros, J. Zorec, Jaschek, Lamers, Lanz, Levenhagen, Lyubimkov, M. Floquet, Maeder, Merrill, Meynet, Meynet, Neiner, Neiner, Perryman, Porter, Rivinius, Royer, Schaller, Sigut, Slettebak, Sokolov, Solano, Theodossiou, Vieira, Y. Frémat, Yudin, Zorec, Zorec   +49 more
core   +5 more sources

Solar-type Stars Observed by LAMOST and Kepler

, 2020
Obtaining measurements of chromospheric and photometric activity of stars with near-solar fundamental parameters and rotation periods is important for a better understanding of solar-stellar connection.
Bi, Shaolan, Du, Minghao, Li, Tanda, Li, Yaguang, Reinhold, Timo, Shapiro, Alexander I., Sowmya, Krishnamurthy, Xiang, Maosheng, Yu, Jie, Zhang, Jinghua, Zhang, Xianfei   +10 more
core   +1 more source

Towards an Accurate Determination of Parameters for Very Massive Stars: the Eclipsing Binary LMC-SC1-105 [PDF]

, 2008
This paper presents a photometric and spectroscopic study of the bright blue eclipsing binary LMC-SC1-105, selected from the OGLE catalog as a candidate host of very massive stars (>=30Mo).
Alceste Z. Bonanos, Andersen, Bagnuolo, Bally, Bonanos, Bonanos, Bonanos, Bouret, Bromm, Claret, Derekas, Elmegreen, Faccioli, Fitzpatrick, Gies, González, Hadrava, Herrero, Hilditch, Howarth, Kelson, Krumholz, Lanz, Massey, Massey, Massey, Mayer, Maíz Apellániz, Mochnacki, Nelson, O'Connell, Oey, Pinsonneault, Prša, Ribas, Santolaya-Rey, Schaerer, Schaller, Schwarzenberg-Czerny, Simon, Soszynski, Stickland, Walborn, Zebrun   +43 more
core   +1 more source

Three Ultra-short-period Contact Eclipsing Binary Systems Mined from Massive Astronomical Surveys

The Astronomical Journal, 2023
We present the photometric analysis of three ultra-short-period total eclipsing binaries in contact configuration, CRTS_J172718.0+431624, OGLE-BLG-ECL-000104, and OGLE-BLG-ECL-000012, mined from massive astronomical surveys.
Athanasios Papageorgiou, Panagiota-Eleftheria Christopoulou, C. E. Ferreira Lopes, Eleni Lalounta, Márcio Catelan, Andrew J. Drake   +5 more
doaj   +1 more source

Eclipsing binaries in the MACHO database: New periods and classifications for 3031 systems in the Large Magellanic Cloud [PDF]

, 2007
Eclipsing binaries offer a unique opportunity to determine fundamental physical parameters of stars using the constraints on the geometry of the systems. Here we present a reanalysis of publicly available two-color observations of about 6800 stars in the
A. Derekas, Aubourg E., Giuricin G., Johnson A., L. L. Kiss, Lah P., Palen S., Pojmanski G., T. R. Bedding, Udalski A.   +9 more
core   +2 more sources

Hidden Companions Detected by Asteroseismology. II. A Long-period Noneclipsing Binary System Revealed by Kepler and TESS

The Astrophysical Journal Letters, 2023
The detection of long-period binary stars containing a δ Scuti variable is helpful to study the formation and evolution of binaries in the intermediate-mass region.
Xin Lyu, Ming Yang
doaj   +1 more source

Spectrum Analysis of Bright Kepler Gamma Doradus Candidate Stars [PDF]

, 2012
Ground-based spectroscopic follow-up observations of the pulsating stars observed by the Kepler satellite mission are needed for their asteroseismic modelling.
A. Tkachenko, Aerts, B. Smalley, Balona, Balona, Balona, Borucki, Bruntt, C. Aerts, Cousins, Cuypers, De Cat, Droege, Dupret, Gilliland, Gray, Grevesse, Grigahcène, Guzik, H. Lehmann, Henry, Hoeg, J. Debosscher, Kaye, Krisciunas, Kupka, Kurucz, Lehmann, Marquardt, Mathias, Monet, Munari, Paunzen, Paunzen, Rodríguez, Rowe, Sadakane, Schmidt-Kaler, Shulyak, Skrutskie, Tsymbal, Uytterhoeven, Zacharias   +42 more
core   +2 more sources

Investigation of a W UMa-type contact binary GZ And in a physical triple system

Frontiers in Astronomy and Space Sciences
GZ And is a variable star within the visually observed multiple-star system ADS 1693. Recent observations have yielded new light curves for GZ And, obtained using the Xinglong 85-cm telescope and the Transiting Exoplanet Survey Satellite (TESS) satellite.
Lin-Qiao Jiang, Lin-Qiao Jiang, Lin-Qiao Jiang, Jie Zheng   +3 more
doaj   +1 more source

Two Different Weak Modulations in ab-type RR Lyrae Variable V838 Cyg, and Potential Influence of Metal Abundance on Blazhko Modulation

The Astronomical Journal, 2023
Noting the weakest modulation and relatively high metal abundance of the ab-type RR Lyrae star V838 Cyg, we collected the photometric data of this star from several sky surveys to carry out an in-depth analysis. The O − C diagram shows that the pulsation
L.-J. Li, S.-B. Qian, X.-D. Shi, L.-Y. Zhu   +3 more
doaj   +1 more source

From Solar to Stellar Brightness Variations: The Effect of Metallicity

, 2018
Context. Comparison studies of Sun-like stars with the Sun suggest an anomalously low photometric variability of the Sun compared to Sun-like stars with similar magnetic activity.
Krivova, N. A., Schmutz, W., Shapiro, A. I., Solanki, S. K., Witzke, V.   +4 more
core   +1 more source