Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Gurian, James"'
Autor:
Gurian, James, Liu, Boyuan, Jeong, Donghui, Hosokawa, Takashi, Hirano, Shingo, Yoshida, Naoki
We present an analytic description of the spherically symmetric gravitational collapse of radiatively cooling gas clouds. The approach is based on developing the "one-zone" density-temperature relationship of the gas into a full dynamical model. We c
Externí odkaz:
http://arxiv.org/abs/2408.12940
Autor:
Liu, Boyuan, Gurian, James, Inayoshi, Kohei, Hirano, Shingo, Hosokawa, Takashi, Bromm, Volker, Yoshida, Naoki
JWST has brought us new insights into Cosmic Dawn with tentative detection of the unique signatures of metal-free Population III (Pop III) stars, such as strong HeII emission, extremely blue UV spectrum, and enhanced nitrogen abundance. Self-consiste
Externí odkaz:
http://arxiv.org/abs/2407.14294
Publikováno v:
2024 ApJ 963 33
We develop an analytic model for the mass of the first stars forming in the center of primordial gas clouds as a function of host halo mass, redshift, and degree of rotation. The model is based on the estimation of key timescales determining the foll
Externí odkaz:
http://arxiv.org/abs/2309.05758
Publikováno v:
ApJL 939 L12 (2022)
We study the minimum mass of dark compact objects formed in dissipative dark-matter halos and show that the simple atomic-dark-matter model consistent with all current observations can create low-mass fragments that can evolve into compact objects fo
Externí odkaz:
http://arxiv.org/abs/2209.00064
Publikováno v:
ApJ 934 (2022) 121
Dissipative dark matter predicts rich observable phenomena that can be tested with future large-scale structure surveys. As a specific example, we study atomic dark matter, consisting of a heavy particle and a light particle charged under a dark elec
Externí odkaz:
http://arxiv.org/abs/2110.11964
Publikováno v:
ApJ 934 (2022) 122
Dark matter that is dissipative may cool sufficiently to form compact objects, including black holes. Determining the abundance and mass spectrum of those objects requires an accurate model of the chemistry relevant for the cooling of the dark matter
Externí odkaz:
http://arxiv.org/abs/2110.11971
Publikováno v:
ApJ 934 (2022) 120
Molecular cooling is essential for studying the formation of sub-structure of dissipative dark-matter halos that may host compact objects such as black holes. Here, we analyze the reaction rates relevant for the formation, dissociation, and transitio
Externí odkaz:
http://arxiv.org/abs/2106.13245
Publikováno v:
Phys. Rev. D 104, 083534 (2021)
At second-order, scalar perturbations can source traceless and transverse perturbations to the metric, called induced gravitational waves (IGW). The apparent gauge-dependence of the IGW obscures the interpretation of the stochastic gravitational-wave
Externí odkaz:
http://arxiv.org/abs/2104.03330
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Akademický článek
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