Results 41 to 50 of about 180,283 (246)
The Science of Galaxy Formation [PDF]
, 2008 Our knowledge of the Universe remains discovery-led: in the absence of adequate physics-based theory, interpretation of new results requires a scientific methodology.
Gerard Gilmore, Leggatt
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The physics of dissipational galaxy formation
The Astrophysical Journal, 1977 A number of arguments lead one to consider the possibility that the first massive galaxies were formed after redshift 10. The formation of galaxies at small redshifts can only have occurred if the formation process was dissipative. This paper is concerned with one theory of dissipative galaxy formation: the theory which arises from the supposition that
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Physical properties of dark matterin galaxy U11454
Physical Sciences and Technology, 2020 In this paper physical characteristics of dark matter distribution in the spiral galaxy U11454 is exploredusing only well-known cored density profiles in the literature such as the pseudo-isothermal, Burkert,Einasto, exponential sphere, Beta and Brownstein profiles.
K. Boshkayev +4 more
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Origin of the highest energy cosmic rays observed
, 2000 Introducing a simple Galactic wind model patterned after the solar wind we show that back-tracing the orbits of the highest energy cosmic events suggests that they may all come from the Virgo cluster, and so probably from the active radio galaxy M87 ...
Antonov +29 more
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Power spectrum multipoles on the curved sky: an application to the 6-degree Field Galaxy Survey [PDF]
, 2018 The peculiar velocities of galaxies cause their redshift-space clustering to depend on the angle to the line-of-sight, providing a key test of gravitational physics on cosmological scales. These effects may be described using a multipole expansion of the
Blake, Chris, Carter, Paul, Koda, Jun
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Reoriented Memory of Galaxy Spins for the Early Universe
The Astrophysical Journal, 2023 Galaxy spins are believed to retain the initially acquired tendency of being aligned with the intermediate principal axis of the linear tidal field, which disseminates the prospect of using them as a probe of early universe physics. This roseate prospect,
Jun-Sung Moon, Jounghun Lee
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Essential physics of early galaxy formation [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 We present a theoretical model embedding the essential physics of early galaxy formation (z = 5-12) based on the single premise that any galaxy can form stars with a maximal limiting efficiency that provides enough energy to expel all the remaining gas, quenching further star formation.
P. Dayal +3 more
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The galaxy correlation function as a constraint on galaxy formation physics
, 2016 We introduce methods which allow observed galaxy clustering to be used together with observed luminosity or stellar mass functions to constrain the physics of galaxy formation.
Angulo, Raul E. +3 more
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Galaxy formation and physical bias
The Astrophysical Journal, 1992 We have supplemented our code, which computes the evolution of the physical state of a representative piece of the universe to include, not only the dynamics of dark matter (with a standard PM code), and the hydrodynamics of the gaseous component (including detailed collisional and radiative processes), but also galaxy formation on a heuristic but ...
Renyue Cen, Jeremiah P. Ostriker
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Can We Discover Physical Models Using Machine Learning? A Case Study of Galaxy Sizes
The Astrophysical JournalWe explore the ability of machine learning methods to discover underlying equations of physics by searching for the equations governing galaxy size in a semianalytic model. This case study allows us to evaluate the process as we know the ground truth. We
Festa Buçinca-Çupallari +4 more
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