Results 1 to 10 of about 112,957 (294)

The Dynamical Evolution of Globular Clusters with Stellar Mass Loss [PDF]

open access: greenJournal of Astronomy and Space Sciences, 1991
The dynamical evolution of globular clusters is studied using the orbit-averaged multicomponent Fokker-Planck equation. The original code developed by Cohn(1980) is modified to include the effect of stellar evolutions.
Chang-Hwan Kim   +2 more
doaj   +1 more source

Pinwheel Outflow Induced by Stellar Mass Loss in a Coplanar Triple System [PDF]

open access: greenThe Astrophysical Journal
We develop a physical framework for interpreting complex circumstellar patterns whorled around asymptotic giant branch (AGB) stars by investigating stable, coplanar triple systems using hydrodynamic and particle simulations.
Hyosun Kim   +3 more
doaj   +2 more sources

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   +1 more source

The Long-term Spectral Changes of Eta Carinae: Are they Caused by a Dissipating Occulter as Indicated by cmfgen Models?

open access: yesThe Astrophysical Journal, 2023
Eta Carinae ( η Car) exhibits a unique set of P Cygni profiles with both broad and narrow components. Over many decades, the spectrum has changed—there has been an increase in observed continuum fluxes and a decrease in Fe ii and H i emission-line ...
Augusto Damineli   +25 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

Impact of Changing Stellar and Planetary Magnetic Fields on (Exo)planetary Environments and Atmospheric Mass Loss

open access: yesThe Astrophysical Journal, 2023
The magnetic activity of a star—which modulates the stellar wind outflow—shapes the immediate environments of orbiting (exo)planets and induces atmospheric loss, thereby impacting their habitability.
Sakshi Gupta   +2 more
doaj   +1 more source

Continuous stellar mass-loss in N-body models of galaxies [PDF]

open access: yes, 2001
We present an N-body computer code - aimed at studies of galactic dynamics - with a CPU-efficient algorithm for a continuous (i.e. time-dependent) stellar mass-loss. First, we summarize available data on stellar mass-loss and derive the long-term (20 Gyr)
B. Jungwiert   +31 more
core   +2 more sources

The Division between Weak and Strong Explosions from Failed Supernovae

open access: yesThe Astrophysical Journal, 2023
Some massive stars likely fail to produce core-collapse supernovae, but these failed supernovae (FSNe) can generate an electromagnetic outburst prior to the disappearance of the star, as the mass lost to neutrinos during the stellar core collapse results
Eric R Coughlin
doaj   +1 more source

Extreme Tidal Stripping May Explain the Overmassive Black Hole in Leo I: A Proof of Concept

open access: yesThe Astrophysical Journal Letters, 2023
A recent study found dynamical evidence of a supermassive black hole of ∼3 × 10 ^6 M _⊙ at the center of Leo I, the most distant dwarf spheroidal galaxy of the Milky Way. This black hole, comparable in mass to the Milky Way’s Sgr A*, places the system >2
Fabio Pacucci, Yueying Ni, Abraham Loeb
doaj   +1 more source

Magnetism in High-Mass Stars

open access: yesGalaxies, 2023
Magnetism is a ubiquitous property of astrophysical plasmas, yet stellar magnetism still remains far from being completely understood. In this review, we describe recent observational and modelling efforts and progress to expand our knowledge of the ...
Zsolt Keszthelyi
doaj   +1 more source

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