Results 41 to 50 of about 355,593 (244)
Possible formation of ring galaxies by torus-shaped magnetic wormholes
European Physical Journal C: Particles and Fields, 2020 We present the hypothesis that some of ring galaxies were formed by relic magnetic torus-shaped wormholes. In the primordial plasma before the recombination magnetic fields of wormholes trap baryons whose energy is smaller than a threshold energy.
A. A. Kirillov, E. P. Savelova
doaj +1 more source
Complex Organics in Space: A Changing View of the Cosmos
Galaxies, 2023 Planetary explorations have revealed that complex organics are widely present in the solar system. Astronomical infrared spectroscopic observations have discovered that complex organics are synthesized in large quantities in planetary nebulae and ...
Sun Kwok
doaj +1 more source
On the deuterium abundance and the importance of stellar mass loss in the interstellar and intergalactic medium [PDF]
, 2018 We quantify the gas-phase abundance of deuterium and fractional contribution of stellar mass loss to the gas in cosmological zoom-in simulations from the Feedback In Realistic Environments project.
Chan, T. K. +7 more
core +6 more sources
The Radiative Transport of Dust in Primordial Galaxies and Second-Generation Star Formation [PDF]
, 2005 We investigate the radiative transport of dust in primordial galaxies in the presence of the UV radiation field from the first metal-free stars. We find that dust created in the first supernova (SN) explosions can be driven through the interior of the SN
A. Venkatesan, B. Nath, J. Shull
semanticscholar +1 more source
The Stellar Initial Mass Function in Primordial Galaxies [PDF]
, 2002 In the context of star formation through fragmentation of an extremely metal deficient protogalactic cloud, the gravitational collapse of filamentary gas clouds is explored with one-dimensional numerical hydrodynamics coupled with nonequilibrium ...
F. Nakamura, M. Umemura
semanticscholar +1 more source
Formation of Primordial Galaxies under Ultraviolet Background Radiation [PDF]
, 2000 The pancake collapse of pregalactic clouds under UV background radiation is explored with a one-dimensional sheet model. Here, attention is concentrated on elucidating the basic physics on the thermal evolution of pregalactic clouds exposed to diffuse UV
H. Susa, M. Umemura
semanticscholar +1 more source
Cosmological Information in the Intrinsic Alignments of Luminous Red Galaxies [PDF]
, 2013 The intrinsic alignments of galaxies are usually regarded as a contaminant to weak gravitational lensing observables. The alignment of Luminous Red Galaxies, detected unambiguously in observations from the Sloan Digital Sky Survey, can be reproduced by ...
Chisari, Nora Elisa, Dvorkin, Cora
core +2 more sources
Massive Primordial Black Holes from Hybrid Inflation as Dark Matter and the seeds of Galaxies [PDF]
, 2015 The work of S. C. is supported by the Return Grant program of the Belgian Science Policy (BELSPO). J. G.-B. acknowledges financial support from the Spanish MINECO under Grants No. FPA 2012-39684-C03-02 and No. FPA 2013-47983-C03-03 and Consolider-Ingenio
S. Clesse, J. Garc'ia-Bellido
semanticscholar +1 more source
Primordial Molecular Emission in Population III Galaxies [PDF]
Publications of the Astronomical Society of Japan, 2005 Abstract We consider the formation of molecules in primordial prestellar clumps and evaluate the line luminosities to assess detectability by next-generation observational facilities. If the initial $\mathrm{H}_2$ fraction is sufficiently high, HD becomes an important coolant in the clumps.
Mizusawa, Hiromi +2 more
openaire +2 more sources