Results 141 to 150 of about 355,593 (244)

BEST-FIT COSMOLOGICAL PARAMETERS FROM OBSERVATIONS OF THE LARGE SCALE STRUCTURE OF THE UNIVERSE

Odessa Astronomical Publications, 2017
The possibility to determine cosmological parameters on the basis of a wide set of observational data including the Abell-ACO cluster power spectrum and mass function, peculiar velocities of galaxies, the distribution of Ly-α clouds and CMB temperature ...
B. Novosyadlyj, S. Apunevych, R. Durrer, S. Gottloeber, V. Lukash   +4 more
doaj   +1 more source

Dissipative merging of galaxies [PDF]

The galaxy merging is investigated with hydrodynamical processes taken into account. For this purpose, the 3D calculations are performed by the use of a smoothed particle hydrodynamics (SPH) scheme combined with an N-body scheme.
Umemura, M.
core   +1 more source

Diverse Oxygen Abundance in Early Galaxies Unveiled by Auroral Line Analysis with JWST

The Astrophysical Journal
We present deep JWST NIRSpec observations in the sight line of MACS J1149.5+2223, a massive cluster of galaxies at z = 0.54. We report the spectroscopic redshift of 28 sources at 3 < z < 9.1, including nine sources with the detection of the ${\left[{\rm ...
Takahiro Morishita, Massimo Stiavelli, Claudio Grillo, Piero Rosati, Stefan Schuldt, Michele Trenti, Pietro Bergamini, Kit Boyett, Ranga-Ram Chary, Nicha Leethochawalit, Guido Roberts-Borsani, Tommaso Treu, Eros Vanzella   +12 more
doaj   +1 more source

The Supersonic Project: Lighting Up the Faint End of the JWST UV Luminosity Function

The Astrophysical Journal Letters
The James Webb Space Telescope (JWST) is capable of probing extremely early eras of our Universe, when the supersonic relative motions between dark matter and baryonic overdensities modulate structure formation ( z ≳ 10).
Claire E. Williams, William Lake, Smadar Naoz, Blakesley Burkhart, Tommaso Treu, Federico Marinacci, Yurina Nakazato, Mark Vogelsberger, Naoki Yoshida, Gen Chiaki, Yeou S. Chiou, Avi Chen   +11 more
doaj   +1 more source

87th Annual Meeting of the Meteoritical Society 2025: Contents

Meteoritics &Planetary Science, Volume 60, Issue S1, Page 2-29, August 2025.
wiley   +1 more source

The Dual Nature of GHZ9: Coexisting Active Galactic Nuclei and Star Formation Activity in a Remote X-Ray Source at z = 10.145

The Astrophysical Journal
We present James Webb Space Telescope (JWST)/NIRSpec PRISM spectroscopic characterization of GHZ9 at z = 10.145 ± 0.010, currently the most distant source detected by the Chandra X-ray Observatory.
Lorenzo Napolitano, Marco Castellano, Laura Pentericci, Cristian Vignali, Roberto Gilli, Adriano Fontana, Paola Santini, Tommaso Treu, Antonello Calabrò, Mario Llerena, Enrico Piconcelli, Luca Zappacosta, Sara Mascia, Roberta Tripodi, Pablo Arrabal Haro, Pietro Bergamini, Tom J. L. C. Bakx, Mark Dickinson, Karl Glazebrook, Alaina Henry, Nicha Leethochawalit, Giovanni Mazzolari, Emiliano Merlin, Takahiro Morishita, Themiya Nanayakkara, Diego Paris, Simonetta Puccetti, Guido Roberts-Borsani, Sofia Rojas Ruiz, Piero Rosati, Eros Vanzella, Fabio Vito, Benedetta Vulcani, Xin Wang, Ilsang Yoon, Jorge A. Zavala   +35 more
doaj   +1 more source

87th Annual Meeting of the Meteoritical Society 2025: Abstracts

Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley   +1 more source

Local Analogs of Primordial Galaxies: In Search of Intermediate-mass Black Holes with JWST NIRSpec

The Astrophysical Journal
Local low-metallicity galaxies with signatures of possible accretion activity are ideal laboratories in which to search for the lowest-mass black holes and study their impact on the host galaxy.
Sara Doan, Shobita Satyapal, William Matzko, Nicholas P. Abel, Torsten Böker, Thomas Bohn, Gabriela Canalizo, Jenna M. Cann, Jacqueline Fischer, Stephanie LaMassa, Suzanne C. Madden, Jeffrey D. McKaig, D. Schaerer, Nathan J. Secrest, Anil Seth, Laura Blecha, Mallory Molina, Barry Rothberg   +17 more
doaj   +1 more source

Eridanus III and DELVE 1: Carbon-rich Primordial Star Clusters or the Smallest Dwarf Galaxies?

The Astrophysical Journal
We present spectroscopy of the ultra-faint Milky Way satellites Eridanus III (Eri III) and DELVE 1. We identify eight member stars in each satellite and place nonconstraining upper limits on their velocity and metallicity dispersions.
Joshua D. Simon, Ting S. Li, Alexander P. Ji, Andrew B. Pace, Terese T. Hansen, William Cerny, Ivanna Escala, Sergey E. Koposov, Alex Drlica-Wagner, Sidney Mau, Evan N. Kirby   +10 more
doaj   +1 more source

The Stellar Initial Mass Function of Early Dark Matter–free Gas Objects

The Astrophysical Journal Letters
Among the remarkable strides made by JWST is the discovery of the earliest star clusters found to date. These have been proposed as early progenitors of globular clusters, which are known to come from the early stages of star formation in the Universe ...
William Lake, Michael Y. Grudić, Smadar Naoz, Naoki Yoshida, Claire E. Williams, Blakesley Burkhart, Federico Marinacci, Mark Vogelsberger, Avi Chen   +8 more
doaj   +1 more source