Results 31 to 40 of about 14,824 (273)

Gaia FGK benchmark stars: Fundamental Teff and logg of the third version [PDF]

Astronomy & Astrophysics, 2023
Large spectroscopic surveys devoted to the study of the Milky Way, including Gaia, use automated pipelines to determine the atmospheric parameters of millions of stars. The Gaia FGK benchmark stars are reference stars with and derived through fundamental
C. Soubiran, O. Creevey, Nadège Lagarde, N. Brouillet, P. Jofré, L. Casamiquela, U. Heiter, Claudia Aguilera Gomez, S. Vitali, C. Worley, Danielle de Brito Silva   +10 more
semanticscholar   +1 more source

The CAMELS Multifield Data Set: Learning the Universe’s Fundamental Parameters with Artificial Intelligence [PDF]

Astrophysical Journal Supplement Series, 2021
We present the Cosmology and Astrophysics with Machine Learning Simulations (CAMELS) Multifield Data set (CMD), a collection of hundreds of thousands of 2D maps and 3D grids containing many different properties of cosmic gas, dark matter, and stars from ...
F. Villaescusa-Navarro, S. Genel, D. Anglés-Alcázar, L. Thiele, R. Davé, D. Narayanan, A. Nicola, Yin Li, Pablo Villanueva-Domingo, Benjamin Dan Wandelt, D. Spergel, R. Somerville, J. Z. Matilla, F. G. Mohammad, Sultan Hassan, Helen Shao, D. Wadekar, Michael Eickenberg, Kaze W. K. Wong, Gabriella Contardo, Yongseok Jo, E. Moser, E. Lau, Luis Fernando Machado Poletti Valle, L. A. Perez, D. Nagai, N. Battaglia, M. Vogelsberger   +27 more
semanticscholar   +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

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

Fundamental parameters of Galactic luminous OB stars VI. Temperatures, masses and WLR of Cyg OB2 supergiants ? [PDF]

, 2002
We have analyzed six OB supergiants and one giant covering spectral types from O3 to B1 in the Galactic OB as- sociation Cyg OB2 by means of an updated version of FASTWIND (Santolaya-Rey et al.
A. Herrero, A. Herrero, J. Puls, F. Najarro   +3 more
semanticscholar   +1 more source

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

Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER ? [PDF]

, 2013
Thanks to their large angular dimension and brightness, red giants and supergiants are privileged targets for optical long-baseline interferometers. 16 red giants and supergiants have been observed with the VLTI/AMBER facility over a 2-year period, at ...
P. Cruzalèbes, A. Jorissen, Y. Rabbia, S. Sacuto, A. Chiavassa, A. Chiavassa, E. Pasquato, B. Plez, Karl Martin Eriksson, A. Spang, O. Chesneau   +10 more
semanticscholar   +1 more source

Photometric Calibrations of M-dwarf Metallicity with Markov Chain Monte Carlo and Bayesian Inference

The Astrophysical Journal, 2023
Knowledge of stellar atmospheric parameters ( T _eff , $\mathrm{log}g$ , [Fe/H]) of M dwarfs can be used to constrain both theoretical stellar models and Galactic chemical evolutionary models, and guide exoplanet searches, but their determination is ...
C. Duque-Arribas, D. Montes, H. M. Tabernero, J. A. Caballero, J. Gorgas, E. Marfil   +5 more
doaj   +1 more source

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).
Y. Frémat, C. Neiner, A. Hubert, M. Floquet, J. Zorec, E. Janot-Pacheco, J. D. Medeiros   +6 more
semanticscholar   +1 more source