Results 31 to 40 of about 37,989 (204)

BLACK HOLE FORMATION IN PRIMORDIAL GALAXIES: CHEMICAL AND RADIATIVE CONDITIONS [PDF]

The Astrophysical Journal, 2010
In massive primordial galaxies, the gas may directly collapse and form a single central massive object if cooling is suppressed. Line cooling by molecular hydrogen can be suppressed in the presence of a strong soft-ultraviolet radiation field, but the role played by other cooling mechanisms is less clear.
Schleicher, Dominik Reinhold Georg, Spaans, Marco, Glover, Simon C. O.   +2 more
openaire   +4 more sources

Galaxy-CMB and galaxy-galaxy lensing on large scales: Sensitivity to primordial non-Gaussianity

Physical Review D, 2009
A convincing detection of primordial non-Gaussianity in the local form of the bispectrum, whose amplitude is given by the fNL parameter, offers a powerful test of inflation. In this paper we calculate the modification of two-point cross-correlation statistics of weak lensing - galaxy-galaxy lensing and galaxy-Cosmic Microwave Background (CMB) cross ...
Jeong, Donghui, Komatsu, Eiichiro, Jain, Bhuvnesh   +2 more
openaire   +4 more sources

Illuminating the Dark Side of Cosmic Star Formation. II. A Second Date with RS-NIRdark Galaxies in COSMOS

The Astrophysical Journal, 2023
About 12 billion years ago, the Universe was first experiencing light again after the dark ages, and galaxies filled the environment with stars, metals, and dust. How efficient was this process? How fast did these primordial galaxies form stars and dust?
Meriem Behiri, Margherita Talia, Andrea Cimatti, Andrea Lapi, Marcella Massardi, Andrea Enia, Cristian Vignali, Matthieu Bethermin, Andreas Faisst, Fabrizio Gentile, Marika Giulietti, Carlotta Gruppioni, Francesca Pozzi, Vernesa Smolçić, Gianni Zamorani   +14 more
doaj   +1 more source

Contributions to the Power Spectrum of Cosmic Microwave Background from Fluctuations Caused by Clusters of Galaxies [PDF]

, 2000
We estimate the contributions to the cosmic microwave background radiation (CMBR) power spectrum from the static and kinematic Sunyaev-Zel'dovich (SZ) effects, and from the moving cluster of galaxies (MCG) effect.
Aghanim N., Aghanim N., Blanchard A., Bond J. R., Carlberg R. G., Caroll S. M., Cavaliere A., Cole S., De Luca A., Eke V. R., Haehnelt M. G., Jahoda K., Kaiser N., Lacey C., Lahav O., Oukbir J., Tuluie R.   +16 more
core   +3 more sources

On the Formation and Interaction of Multiple Supermassive Stars in Cosmological Flows

The Astrophysical Journal, 2023
Supermassive primordial stars with masses exceeding ∼10 ^5 M _⊙ that form in atomically cooled halos are the leading candidates for the origin of high-redshift quasars at z > 6.
Tyrone E. Woods, Samuel Patrick, Daniel J. Whalen, Alexander Heger   +3 more
doaj   +1 more source

Suppression of small baryonic structures due to a primordial magnetic field

, 2010
We investigate the impact of the existence of a primordial magnetic field on the filter mass, characterizing the minimum baryonic mass that can form in dark matter (DM) haloes.
Barkana, Barkana, Biermann, Cen, Clarke, De Souza, De Souza, De Souza, Furlanetto, Gnedin, Gnedin, Grasso, Haiman, Han, Hanayama, Ichiki, Iliev, Iliev, Kravtsov, Kronberg, Kuhlen, Kulsrud, Laganá, Luiz Felippe S. Rodrigues, Macciò, Maeda, McQuinn, Miranda, Naoz, Naoz, Naoz, Padmanabhan, Peebles, Rafael S. De Souza, Rees, Reuven Opher, Schleicher, Shapiro, Takahashi, Takahashi, Tashiro, Wasserman, Widrow, Wyithe, Yamazaki, Zweibel   +45 more
core   +1 more source

THE BIRTH OF A GALAXY: PRIMORDIAL METAL ENRICHMENT AND STELLAR POPULATIONS [PDF]

The Astrophysical Journal, 2011
By definition, Population III stars are metal-free, and their protostellar collapse is driven by molecular hydrogen cooling in the gas-phase, leading to large characteristic masses. Population II stars with lower characteristic masses form when the star-forming gas reaches a critical metallicity of 10^{-6} - 10^{-3.5} Z_\odot.
Wise, John H., Turk, Matthew J., Norman, Michael L., Abel, Tom, /KIPAC, Menlo Park   +4 more
openaire   +3 more sources

Primordial Galaxy Formation and IGM Reionization

Astrophysics and Space Science, 2002
In this talk I will present a model for primordial galaxy formation. In particular, I will review the feedback effects that regulate the process: (i) radiative (i.e. ionizing and H_2-photodissociating photons) and (ii) stellar (i.e. SN explosions) feedback produced by massive stars.
openaire   +4 more sources

Halo/galaxy bispectrum with equilateral-type primordial trispectrum [PDF]

Physical Review D, 2015
We investigate the effect of equilateral-type primordial trispectrum on the halo/galaxy bispectrum. We consider three types of equilateral primordial trispectra which are generated by quartic operators naturally appeared in the effective field theory of inflation and can be characterized by three non-linearity parameters, $g_{\rm NL} ^{\dotσ^4}$, $g_ ...
Mizuno, Shuntaro, Yokoyama, Shuichiro
openaire   +2 more sources

JWST NIRSpec Spectroscopy of the Remarkable Bright Galaxy GHZ2/GLASS-z12 at Redshift 12.34

The Astrophysical Journal
We spectroscopically confirm the M _UV = −20.5 mag galaxy GHZ2/GLASS-z12 to be at redshift z = 12.34. The source was selected via NIRCam photometry in GLASS-JWST Early Release Science data, providing the first evidence of a surprising abundance of bright
Marco Castellano, Lorenzo Napolitano, Adriano Fontana, Guido Roberts-Borsani, Tommaso Treu, Eros Vanzella, Jorge A. Zavala, Pablo Arrabal Haro, Antonello Calabrò, Mario Llerena, Sara Mascia, Emiliano Merlin, Diego Paris, Laura Pentericci, Paola Santini, Tom J. L. C. Bakx, Pietro Bergamini, Guido Cupani, Mark Dickinson, Alexei V. Filippenko, Karl Glazebrook, Claudio Grillo, Patrick L. Kelly, Matthew A. Malkan, Charlotte A. Mason, Takahiro Morishita, Themiya Nanayakkara, Piero Rosati, Eleonora Sani, Xin Wang, Ilsang Yoon   +30 more
doaj   +1 more source