Results 271 to 280 of about 54,114 (300)

The dramatic transition of the extreme Red Supergiant WOH G64 to a Yellow Hypergiant

Munoz-Sanchez G, Kalitsounaki M, de Wit S, Antoniadis K, Bonanos A, Zapartas E, Boutsia K, Christodoulou E, Maravelias G, Soszyński I, Udalski A.   +10 more
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Feedback mechanisms stopping the star formation in a pair of massive galaxies in the early Universe

Pérez-González P, D'Eugenio F, Pino BRD, Perna M, Uebler H, Maiolino R, Arribas S, Lamperti I, Bunker A, Carniani S, Charlot S, Willott C, Böker T, Parlanti E, Scholtz J, Venturi G, Barro G, Costantin L, Navarro IM, Dunlop J, Magee D, Cresci G.   +21 more
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Black Holes in Galaxy Mergers

2006
Here we report on simulations which, for the first time, simultaneously track star formation and black hole growth, and associated feedback processes, during collisions of galaxies. We show that encounters and mergers of galaxies lead to strong nuclear gas inflows, fueling both powerful starbursts and rapid growth of central black holes.
Di Matteo, T., Springel, V., Hernquist, L.   +2 more
openaire   +2 more sources

Interacting galaxies and mergers

Astrophysics and Space Science, 1993
A study of the merger time-scales of various types of interacting galaxies is conducted on the basis of the collisional theory. The results indicate that in the absence of halos, violently interacting galaxies merge in a time-scale of ~ 108 years; but the mildly interacting ones have merger time-scales from ~ 109 to 1010 years. However, in the presence
openaire   +1 more source

Interactions and mergers of galaxies

Resonance, 2007
When two galaxies approach each other, we can witness the effects of the tidal forces on a gigantic scale. Peculiar features like galactic bridges and galactic tails may form, or the two galaxies may even merge into each other and form a single system. Merger of two spiral galaxies leads to the formation of an elliptical galaxy.
S M Alladin, S N Hasan
openaire   +1 more source

Transformation of Galaxies by Mergers

2003
The variation of the structural and astrophysical properties of spiral galaxies through the Hubble classification is generally interpreted in terms of an evolutionary sequence. However, the physical mechanisms that could drive this evolution are not fully understood.
C. Scannapieco, P. B. Tissera
openaire   +1 more source

Merger time scale of galaxies

AIP Conference Proceedings, 2008
In this talk, we present our recent study of galaxy mergers in a high‐resolution cosmological hydro/N‐body simulation with star formation, and compare the measured merger timescales with theoretical predictions based on the Chandrasekhar formula. In contrast to Navarro et al., our numerical results indicate, that the commonly used equation for the ...
Y. P. Jing, C. Y. Jiang, A. Faltenbacher, W. P. Lin, Cheng Li, Carlo Luciano Bianco, She-Sheng Xue   +6 more
openaire   +1 more source

Globular clusters and galaxy mergers

Publications of the Astronomical Society of the Pacific, 1982
The specific cluster frequency in galaxies of type Sb is found to be an order of magnitude lower than that in ellipticals. This observation shows that typical E galaxies cannot have formed by mergers of spirals. Presently available observations suggest, but do not yet prove, that the spheroidal-bulge components of spiral galaxies have a lower specific ...
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Metallaphotoredox: The Merger of Photoredox and Transition Metal Catalysis

Chemical Reviews, 2022
Noah B Bissonnette, Lucas I Frye, Marissa N Lavagnino   +2 more
exaly  

Advances on the Merger of Electrochemistry and Transition Metal Catalysis for Organic Synthesis

Chemical Reviews, 2022
Christian A Malapit, Jaime R Cabrera-Pardo, Min Li   +2 more
exaly