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Scientific objectives of the Hot Universe Baryon Surveyor (HUBS) mission
The Hot Universe Baryon Surveyor (HUBS) is a proposed space-based X-ray telescope for detecting X-ray emissions from the hot gas content in our...
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Course 9: Accretion around Active Galactic Nuclei
In bright AGN, at distances of several Schwarzschild radii, the accretion onto a black hole proceeds predominantly in a form of a cool accretion...
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Course 12: Evolution of YSO Disks
As stars and planets form from accretion processes in disks, it is important to understand these processes and their evolutionary implications. While...
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HelioSwarm: A Multipoint, Multiscale Mission to Characterize Turbulence
HelioSwarm (HS) is a NASA Medium-Class Explorer mission of the Heliophysics Division designed to explore the dynamic three-dimensional mechanisms...
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Close Binary Stars. VII: On the Evolution of Close Binary Systems
AbstractThe article considers various aspects of the evolution of close binary systems (CBSs). The variation in the orbital parameters of a CBS...
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Radio-Frequency Spectroscopy
Whereas the resolution in standard optical investigations of free atoms is limited by different broadening mechanisms in the light source and the...
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Evolution of the Solar Wind Speed with Heliocentric Distance and Solar Cycle. Surprises from Ulysses and Unexpectedness from Observations of the Solar Corona
An extensive analysis of Ulysses observations of the solar wind speed V from 1990 to 2008 is undertaken. It is shown that the evolution of V with...
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Solar Observatories
This chapter summarizes the major space observatories that have been dedicated primarily to solar studies. As described in Chapters...
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On Extended Atmosphere of V509 Cas Hypergiant in 1996–2018
Based on the data of spectral monitoring of the yellow hypergiant V509 Cas performed in 1996–2018 at the 6-m telescope with the spectral resolution...
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Shocks and Post-shock Plasma Processes
Shocks are transition layers in which the flow and thermodynamic properties of the plasma/gas rapidly change.
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Short-lived radioactivities in the early solar system: A fossil record of our origins in stars
The measurements, revealing that several radioactive nuclei, with half-lives from 0.1 to 20 Myr, were present, alive, in the Early Solar System, are...
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Testing fundamental physics with astrophysical transients
Explosive astrophysical transients at cosmological distances can be used to place precision tests of the basic assumptions of relativity theory, such...
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Selected Topics and Case Studies
The brief reviews and essays that make up this final chapter are intended to provide some detailed information and reference material on recent...
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Nuclear processes in astrophysics: Recent progress
The question about the origin of the elements is a fascinating one, that scientists have been trying to answer for the last seven decades. The...
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Changes of the Optical Spectrum of the Hypergiant ρ Cas due to a Shell Ejection in 2013
Spectral monitoring of the yellow hypergiant ρ Cas with the by 6-m telescope of the Special Astrophysical Observatory with a spectral resolution of R ...
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GW170817: The Dawn of Multi-messenger Astronomy Including Gravitational Waves
On 2017 August 17 the Advanced LIGO and Advanced Virgo detectors detect for the first time the signal, GW170817, from the coalescence of a binary...
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Catalog
E. Hertzsprung was born near Copenhagen (Denmark) in 1873. He studied in technical colleges and became a chemical engineer, working for a while in...
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Gamma-ray astrophysics
High-energy photons are a powerful probe for astrophysics and for fundamental physics in extreme conditions. In recent years, our knowledge of the...
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An Overview of Multimessenger Astrophysics
The Standard Model of the microcosm, which includes the theory of electroweak interaction and quantum chromodynamics for strong interaction, explains...
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Observatory science with eXTP
In this White Paper we present the potential of the enhanced X-ray Timing and Polarimetry (eXTP) mission for studies related to Observatory Science...
