Results 61 to 70 of about 3,286 (161)
Astronomy & AstrophysicsContext. Cosmic voids, vast, underdense regions of the Universe, serve as unique laboratories for studying galaxy evolution in isolation. Within these voids, galaxy triplets, rare systems of three close galaxies, provide crucial insights into how local ...
Azevedo G. M. +7 more
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The Origin and Early History of the Sun and the Planetary System in the Context of Stellar Evolution [PDF]
Highlights of Astronomy, 1983 AbstractA plausible scenario for the early history of the sun can be constructed by combining the results of stellar astronomy with lunar and meteoritic chronologies. The meteorites apparently contain material exposed to two nucleosynthetic events, one about 108 yr and another a few 106 yr before solidification. Following II.
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The Astronomical JournalWe investigate the connection between stellar mass distribution, assembly history, and star formation timescales in low-redshift massive early-type galaxies (ETGs) by combining deep LegacySurvey imaging with MaNGA’s spatially resolved spectroscopy ...
Xiaoya Zhang, Song Huang, Meng Gu
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The Astrophysical JournalObservations and cosmological simulations indicate that the early Universe hosted numerous compact, high-density stellar systems, where close encounters and physical collisions between stars were likely common.
Claire E. Williams +10 more
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Early Stellar Evolution And The Role Of Magnetic Fields
, 2017 Presentation given at the 2017 Georgia Regional Astronomy Meeting (GRAM) at the University of Georgia (Athens, GA, USA). Abstract Young low-mass stars often exhibit observational signatures of temperature anisotropies on their surface. The features, known as starspots, are thought to be the result of strong magnetic fields analogous to sunspots at the
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Tracing the Relic Nature of Compact Galaxies through Their Globular Cluster Systems
The Astrophysical JournalWe investigate the synthetic model of globular cluster (GC) systems of 17 compact massive galaxies (CMGs) from the Illustris TNG100 simulation to explore their connection with massive relic galaxies, systems that have undergone little structural ...
Micheli T. Moura +8 more
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Formation and Disruption of Wide Binaries in Star Clusters Revealed by N-body Simulations
The Astrophysical Journal LettersWide (soft) binaries are expected to be rapidly disrupted in dense stellar environments, yet they are observed in both the Galactic field and open clusters (OCs).
Abylay Bissekenov +5 more
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Early Post Asymptotic Giant Branch Instability: Does it Affect White Dwarf Hydrogen Envelope Mass?
The Open Journal of AstrophysicsAlthough most white dwarf stars have hydrogen-dominated atmospheres, a significant fraction have atmospheres in which hydrogen is spectroscopically absent, with the fraction of hydrogen-free atmo- spheres varying with effective temperature.
James MacDonald
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Spin-down of Solar-mass Protostars in Magnetospheric Accretion Paradigm
The Astrophysical JournalStellar spin is one of the fundamental quantities that characterize a star itself and its planetary system. Nevertheless, stellar spin-down mechanisms in protostellar and pre-main-sequence stellar phases have been a long-standing problem in star ...
Shinsuke Takasao +4 more
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The impact of shear on complexity and Weyl stresses during dissipative collapse
European Physical Journal C: Particles and FieldsIn this work we highlight the impact of shear on Weyl stresses and complexity within a collapsing stellar core which dissipates heat to the exterior spacetime. We adopt a radiating stellar model first presented by Thirukkanesh et al. (J Math Phys.
Kevin Reddy, Megan Govender
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