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MODERN STELLAR ASTRONOMY – 2022

open access: bronzeАстрономический журнал, 2023
We provide an analytic review of problems of the modern stellar astronomy. It mostly based on talks presented at the twelfth annual conference on Modern Stellar Astronomy, held in Caucasian Mountain Observatory of Sternberg Astronomical Institute (Kislovodsk, Russia) in November 2022.
O. Yu. Malkov   +2 more
openalex   +3 more sources

Modern Stellar Astronomy 2023

open access: bronzeAstronomy Reports
We provide an analytic review of problems of the modern stellar astronomy. It mostly based on talks presented at the thirteenth annual conference on Modern Stellar Astronomy, held in Volgograd State University (Russia) in May 2023. The key topics for the review are Stars, Stellar Clusters and Associations, Interstellar Medium and Star Formation, Galaxy
O. Yu. Malkov   +2 more
openalex   +3 more sources

Positional Astronomy and Stellar Masses [PDF]

open access: bronzeSymposium - International Astronomical Union, 1985
In this paper are surveyed the combinations of data needed for mass determinations, the impact of radial-velocity and speckle observations, the 1983 catalog of visual-binary orbits, the current material for main-sequence and red-dwarf masses and the controversial methods and results on low mass objects.
W. D. Heintz
openalex   +2 more sources

X-ray astronomy of stellar coronae [PDF]

open access: yesAstronomy and Astrophysics Review, 2004
X-ray emission from stars in the cool half of the Hertzsprung-Russell diagram is generally attributed to the presence of a magnetic corona that contains plasma at temperatures exceeding 1 million K. Coronae are ubiquitous among these stars, yet many fundamental mechanisms operating in their magnetic fields still elude an interpretation through a ...
exaly   +4 more sources

Invertible Neural Networks in Astrophysics [PDF]

open access: yesEPJ Web of Conferences, 2022
Modern machine learning techniques have become indispensable in many fields of astronomy and astrophysics. Here we introduce a specific class of methods, invertible neural networks, and discuss two specific applications, the prediction of stellar ...
Klessen Ralf S.
doaj   +1 more source

Checking the possibility of determining the relative orbits of stars rotating around the center body of the Galaxy

open access: yesOpen Astronomy, 2022
The results of observations of selected stars orbiting the central body of our Galaxy, which, according to the latest data, has a mass of about 4 million of solar mass, are considered.
Shakht Natalia A.   +2 more
doaj   +1 more source

Spectroscopic Follow-up of Gaia Exoplanet Candidates: Impostor Binary Stars Invade the Gaia DR3 Astrometric Exoplanet Candidates

open access: yesThe Astronomical Journal, 2023
In this paper, we report on the follow-up of six potential exoplanets detected with Gaia astrometry and provide an overview of what is currently known about the nature of the entire Gaia astrometric exoplanet candidate sample, 72 systems in total.
Marcus L. Marcussen, Simon H. Albrecht
doaj   +1 more source

Constraints on Stellar Flare Energy Ratios in the NUV and Optical from a Multiwavelength Study of GALEX and Kepler Flare Stars

open access: yesThe Astrophysical Journal, 2023
We present a multiwavelength study of stellar flares on primarily G-type stars using overlapping time domain surveys in the near-ultraviolet (NUV) and optical regimes. The NUV (the Galaxy Evolution Explorer; GALEX) and optical (Kepler) wavelength domains
C. E. Brasseur   +3 more
doaj   +1 more source

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