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Stellar coronal mass ejections [PDF]

open access: yesSerbian Astronomical Journal, 2022
Stellar coronal mass ejections (CMEs) are a growing research field, especially during the past decade. The large number of so far detected exoplanets raises the open question for the CME activity of stars, as CMEs may strongly affect ...
Leitzinger M., Odert P.
doaj   +3 more sources

The “Building Blocks” of Stellar Halos [PDF]

open access: yesGalaxies, 2017
The stellar halos of galaxies encode their accretion histories. In particular, the median metallicity of a halo is determined primarily by the mass of the most massive accreted object.
Kyle A. Oman   +2 more
doaj   +5 more sources

LATIS: The Stellar Mass–Metallicity Relation of Star-forming Galaxies at z ∼ 2.5

open access: yesThe Astrophysical Journal, 2023
We present the stellar mass–stellar metallicity relation for 3491 star-forming galaxies at 2 ≲ z ≲ 3 using rest-frame far-ultraviolet spectra from the Ly α Tomography IMACS Survey (LATIS).
Nima Chartab   +4 more
doaj   +1 more source

Revisiting the Planet Mass and Stellar Metallicity Relation for Low-Mass Exoplanets Orbiting GKM Class Stars

open access: yesUniverse, 2021
The growing database of exoplanets has shown us the statistical characteristics of various exoplanet populations, providing insight towards their origins.
Jonathan H. Jiang   +4 more
doaj   +1 more source

The Chocolate Chip Cookie Model: Dust-to-metal Ratio of H ii Regions

open access: yesThe Astrophysical Journal Letters, 2023
Using a sample of face-on star-forming galaxies selected from the Sloan Digital Sky Survey, we statistically derive the typical optical depth τ _cl of individual H ii regions based on the “Chocolate Chip Cookie” model of Lu et al. (2022).
Jiafeng Lu   +3 more
doaj   +1 more source

Detection of a High-velocity Prominence Eruption Leading to a CME Associated with a Superflare on the RS CVn-type Star V1355 Orionis

open access: yesThe Astrophysical Journal, 2023
Stellar coronal mass ejections (CMEs) have recently received much attention for their impacts on exoplanets and stellar evolution. Detecting prominence eruptions, the initial phase of CMEs, as the blueshifted excess component of Balmer lines is a ...
Shun Inoue   +7 more
doaj   +1 more source

Wide binary stars with non-coeval components

open access: yesOpen Astronomy, 2022
We have the estimated masses of components of visual binaries from their spectral classification. We have selected pairs in which the less massive component looks more evolved. Spectral observations of some of these pairs were made, and at least one pair,
Malkov Oleg, Kniazev Alexey
doaj   +1 more source

Evolution of Mass Functions of Coeval Stars through Wind Mass Loss and Binary Interactions [PDF]

open access: yes, 2015
Accurate determinations of stellar mass functions and ages of stellar populations are crucial to much of astrophysics. We analyse the evolution of stellar mass functions of coeval main sequence stars including all relevant aspects of single- and binary ...
de Mink, S. E.   +3 more
core   +2 more sources

Scaling Relations for Solar-Like Oscillations: A Review

open access: yesFrontiers in Astronomy and Space Sciences, 2020
The scaling relations for solar-like oscillations provide a translation of the features of the stochastic low-degree modes of oscillation in the Sun to predict the features of solar-like oscillations in other stars with convective outer layers.
Saskia Hekker, Saskia Hekker
doaj   +1 more source

A Statistical Relation between Mass, Age, and Velocity Dispersion in the Solar Neighborhood

open access: yesThe Astrophysical Journal, 2023
The stellar kinematics of the Galactic disk are the main factors constraining disk formation and evolution processes in the Milky Way. In this paper, we investigate a statistical relation between stellar mass, age, and velocity dispersion for stars in ...
Hossein Fatheddin, Sedighe Sajadian
doaj   +1 more source

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