The Hubble Sequence in Groups: The Birth of the Early-Type Galaxies [PDF]
, 2010 The physical mechanisms and timescales that determine the morphological signatures and the quenching of star formation of typical (~L*) elliptical galaxies are not well understood.
Carollo, C. M., Feldmann, R., Mayer, L.
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Formation and evolution of disk galaxies [PDF]
, 2008 Global star formation is the key to understanding galaxy disk formation. This in turn depends on gravitational instability of disks and continuing gas accretion as well as minor merging. A key component is feedback from supernovae.
Joseph Silk, Matthias, Rocha-Pinto, Tan
core +1 more source
New evidence for halo gas accretion onto disk galaxies [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractStudies of the halo gas in the Milky Way and in nearby spiral galaxies show the presence of gas complexes that cannot be reconciled with an internal (galactic fountain) origin and are direct evidence of gas accretion. Estimating gas accretion rates from these features consistently gives values, which are one order of magnitude lower than what ...
openaire +3 more sources
The Astrophysical Journal, 2023 In recent years, increasing attention has been devoted to semi-empirical, data-driven models to tackle some aspects of the complex and still largely debated topic of galaxy formation and evolution. We here present a new semi-empirical model whose marking
L. Boco +5 more
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Cold Dark Matter Substructure and Galactic Disks I: Morphological Signatures of Hierarchical Satellite Accretion [PDF]
, 2007 (Abridged) We conduct a series of high-resolution, dissipationless N-body simulations to investigate the cumulative effect of substructure mergers onto thin disk galaxies in the context of the LCDM paradigm of structure formation. Our simulation campaign
Bullock, James S. +4 more
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Gas accretion from halos to disks: observations, curiosities, and problems
, 2015 Accretion of gas from the cosmic web to galaxy halos and ultimately their disks is a prediction of modern cosmological models but is rarely observed directly or at the full rate expected from star formation. Here we illustrate possible large-scale cosmic
Elmegreen, Bruce G.
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Galaxy-scale Star Formation on the Red Sequence: the Continued Growth of S0s and the Quiescence of Ellipticals [PDF]
, 2012 This paper examines star formation (SF) in relatively massive, primarily early-type galaxies (ETGs) at z~0.1. A sample is drawn from bulge-dominated GALEX/SDSS galaxies on the optical red sequence with strong UV excess and yet quiescent SDSS spectra ...
Barnes +66 more
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How surface density of galaxy disks affects metallicity? Outflow and Accretion [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractIn this study, we examine the effect of surface density of disks on chemical evolution of galaxies. We find that, higher surface brightness galaxies on average possess higher gas-phase metallicity compared to lower surface brightness galaxies with the same stellar and gas mass.
Po-Feng Wu +3 more
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ACCRETION-DRIVEN TURBULENCE AND THE TRANSITION TO GLOBAL INSTABILITY IN YOUNG GALAXY DISKS [PDF]
The Astrophysical Journal, 2010 ApJ vol.
Elmegreen, Bruce G., Burkert, Andreas
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GRB 191019A: A Short Gamma-Ray Burst in Disguise from the Disk of an Active Galactic Nucleus
The Astrophysical Journal Letters, 2023 Long and short gamma-ray bursts (GRBs), canonically separated at around 2 s duration, are associated with different progenitors: the collapse of a massive star and the merger of two compact objects, respectively. GRB 191019A was a long GRB ( T _90 ∼ 64 s)
Davide Lazzati +3 more
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