Results 151 to 160 of about 355,593 (244)

Hidden Population III Descendants in Ultrafaint Dwarf Galaxies

The Astrophysical Journal
The elusive properties of the first (Population III or Pop III) stars can be indirectly unveiled by uncovering their true descendants. To this end, we exploit our data-calibrated model for the best-studied ultrafaint dwarf galaxy (UFD), Boötes I, which ...
Martina Rossi, Stefania Salvadori, Ása Skúladóttir, Irene Vanni, Ioanna Koutsouridou   +4 more
doaj   +1 more source

How do Massive Primordial Black Holes Impact the Formation of the First Stars and Galaxies?

The Astrophysical Journal
We investigate the impact of massive primordial black holes (PBHs; m _BH  ∼ 10 ^6 M _⊙ ) on the star formation and first galaxy assembly process using high-resolution hydrodynamical simulations from z = 1100 to z  ∼ 9.
Saiyang Zhang, Boyuan Liu, Volker Bromm, Junehyoung Jeon, Michael Boylan-Kolchin, Florian Kühnel   +5 more
doaj   +1 more source

Testing Inflation with Large Scale Structure: Connecting Hopes with Reality

, 2014
The statistics of primordial curvature fluctuations are our window into the period of inflation, where these fluctuations were generated. To date, the cosmic microwave background has been the dominant source of information about these perturbations ...
Alvarez, Marcelo, Assassi, Valentin, Baldauf, Tobias, Bond, J. Richard, Braden, Jonathan, Dalal, Neal, de Putter, Roland, Doré, Olivier, Green, Daniel, Hajian, Amir, Hirata, Chris, Huang, Zhiqi, Huterer, Dragan, Jeong, Donghui, Johnson, Matthew C., Kobayashi, Takeshi, Krause, Elisabeth, Loverde, Marilena, Meerburg, P. Daniel, Meyers, Joel, Senatore, Leonardo, Shandera, Sarah, Silverstein, Eva, Slosar, Anže, Smith, Kendrick, Stein, George, van Engelen, Alexander, Zaldarriaga, Matias   +27 more
core  

Formation of Sub-Chandrasekhar-mass Black Holes and Red Stragglers via Hawking Stars in Ultrafaint Dwarf Galaxies

The Astrophysical Journal
Primordial black holes (PBHs) in the asteroid mass window from 10 ^−16 M _⊙ to 10 ^−10 M _⊙ are currently a popular dark matter candidate. If they exist, some stars would capture them upon formation, and they would slowly accrete the star over gigayears.
Andrew D. Santarelli, Matthew E. Caplan, Earl P. Bellinger   +2 more
doaj   +1 more source

Polarized thermal emission from dust in a galaxy at redshift 2.6. [PDF]

Nature, 2023
Geach JE, Lopez-Rodriguez E, Doherty MJ, Chen J, Ivison RJ, Bendo GJ, Dye S, Coppin KEK.   +7 more
europepmc   +1 more source

Primordial Star Formation in the First Galaxies [PDF]

Proceedings of Frank N. Bash Symposium 2011: New Horizons in Astronomy — PoS(Bash11), 2012
Chalence T Safranek-Shrader, Meghann Agarwal, Milos Milosavljevic, Volker Bromm, Miloš Milosavljevic   +4 more
openaire   +1 more source

Primordial black holes in galaxies

Although dark matter in galaxies may consist of elementary particles different from those that conform ordinary matter and that would be smoothly distributed (still undetected), primordial black holes (PBHs) formed after the initial Big Bang are also candidates to account for a certain fraction of mass in galaxies.
openaire   +1 more source

Primordial Core Hypothesis: Early Galaxy Formation Driven by Primordial Black Holes (PBHs)

This work proposes that some of the earliest galaxies may have formed around primordial black holes created soon after the Big Bang. Instead of black holes forming inside galaxies, this hypothesis reverses the sequence, suggesting that primordial black holes may have acted as gravitational seeds for early galactic structure.
openaire   +2 more sources

The James Webb Space Telescope prompts a rethink of how galaxies form. [PDF]

Proc Natl Acad Sci U S A, 2023
Mann A.
europepmc   +1 more source

Parity Violation in Galaxy Shapes: Primordial Non-Gaussianity

We present a comprehensive study of galaxy intrinsic alignment (IA) as a probe of parity-violating primordial non-Gaussianity (PNG). Within the effective field theory (EFT) framework, we show that the parity-odd IA power spectrum is sensitive to the collapsed limit of the parity-odd primordial trispectrum.
Kurita, Toshiki, Jamieson, Drew, Komatsu, Eiichiro, Schmidt, Fabian   +3 more
openaire   +2 more sources