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Weighing stars from birth to death: mass determination methods across the HRD
The mass of a star is the most fundamental parameter for its structure, evolution, and final fate. It is particularly important for any kind of...
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The O+B Eclipsing Binary HD 165246
The physics that drive the evolution of O-type stars are not well understood. These stars experience a plethora of different phenomena which alter...
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Neutron star mass estimates from gamma-ray eclipses in spider millisecond pulsar binaries
Reliable neutron star mass measurements are key to determining the equation of state of cold nuclear matter, but such measurements are rare. Black...
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Magnetic Fields of Chemically Peculiar and Related Stars. VI. Main Results of 2019 and Near-Future Prospects
Abstract —The paper provides a review of important results of studies of chemically peculiar and related magnetic stars. More than 90 papers published...
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Space Missions for Exoplanet Science: Kepler/K2
The Kepler Mission is a space observatory launched in 2009 designed to monitor 170,000 stars over a period of 4 years to explore the structure and...
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B[e] Star CI Camelopardalis in the Optical Range
AbstractWe report the results of photometric and spectroscopic monitoring of CI Cam within 24 years since its outburst in 1998. Over this time, we...
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High-precision distance measurements with classical pulsating stars
Classical Cepheid and RR Lyrae variables are radially pulsating stars that trace young and old-age stellar populations, respectively. These classical...
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Magnetic Fields and Stellar Surface Structures
We discuss the use of high-resolution spectroscopy for studying inhomogeneities on stellar surfaces. Examples of such inhomogeneities include...
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Tops in the Sky
Rotation around a body fixed axis is a general feature of all astrophysical objects. Stars, planets, satellites, asteroids, and comets all share this...
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X-ray Emission Mechanisms in Accreting White Dwarfs
In this chapter, we consider the processes which can lead to X-ray emission from different types of cataclysmic variable stars (CVs). CVs are...
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Semiregular Variable Stars
Studies of semiregular variable stars by different authors are examined and the main theoretical and observational problems associated with these...
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X-ray Polarimetry-Timing
X-ray polarimetry-timing is the characterization of rapid variability in the X-ray polarization degree and angle. As for the case of spectral-timing,...
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Discovery of pulsating components in eclipsing binary systems through the TESS light curves: the cases of CPD-30 740, HD 97329, V1637 Ori and TYC 683-640-1
We present the first evidence for the pulsations of primary components of four eclipsing binary systems. The TESS light curves of the targets are...
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Stellar Magnetic Fields
Stellar magnetic fields are directly detected or inferred across the whole Hertzsprung--Russell Diagram. Attention in this chapter is concentrated on...
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Chronos - take the pulse of our galactic neighbourhood
Understanding our Galaxy’s structure, formation, and evolution will, over the next decades, continue to benefit from the wonderful large survey by Gaia ...
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A calibration point for stellar evolution from massive star asteroseismology
Massive stars are progenitors of supernovae, neutron stars and black holes. During the hydrogen-core burning phase, their convective cores are the...
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X-Ray Emission Mechanisms in Accreting White Dwarfs
In this chapter, we consider the processes which can lead to X-ray emission from different types of cataclysmic variable stars (CVs). CVs are...
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A strangely light neutron star within a supernova remnant
To constrain the equation of state of cold dense matter, astrophysical measurements are essential. These are mostly based on observations of neutron...
