Results 111 to 120 of about 64,574 (197)

Strong He i Emission Lines in High N/O Galaxies at z ∼ 6 Identified in JWST Spectra: High He/H Abundance Ratios or High Electron Densities?

The Astrophysical Journal
We present He i /H β flux and He/H abundance ratios in three James Webb Space Telescope galaxies with significant constraints on N/O abundance ratios, GS-NDG-9422, RXCJ2248-ID, and GLASS150008 at z ∼ 6 mostly with the spectroscopic coverage from He i λ ...
Hiroto Yanagisawa, Masami Ouchi, Kuria Watanabe, Akinori Matsumoto, Kimihiko Nakajima, Hidenobu Yajima, Kentaro Nagamine, Koh Takahashi, Minami Nakane, Nozomu Tominaga, Hiroya Umeda, Hajime Fukushima, Yuichi Harikane, Yuki Isobe, Yoshiaki Ono, Yi Xu, Yechi Zhang   +16 more
doaj   +1 more source

Single‐Cell Hi‐C Technologies and Computational Data Analysis

Advanced Science, Volume 12, Issue 9, March 6, 2025.
This review provides a detailed examination of scHi‐C technologies, offering quantitative evaluations of 13 protocols. It addresses computational challenges arising from data sparsity and presents systematic insights into data analysis methods, including clustering, TAD calling and 3D reconstruction.
Madison A Dautle, Yong Chen
wiley   +1 more source

Dark Energy From the Gravitational Wave Background With Scalar Field Dark Matter

Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT Recent observational results, such as those from pulsar timing arrays (PTA), suggest a low‐frequency Gravitational Wave Background (GWB) permeates our universe. This opens the possibility that gravitational waves could span a broader spectrum, potentially impacting cosmological scales.
Edwin L. Pérez‐Ochoa, Tonatiuh Matos
wiley   +1 more source

Mass growth of massive quiescent galaxies in the Illustris TNG simulation

Acta Polytechnica
Interactions between galaxies could potentially lead to increased rates of star formation within these galaxies, potentially leading to the occurrence of multiple core-collapse supernovae and the ejection of hot gas.
Bendegúz Koncz, András Péter Joó
doaj   +1 more source

THE LOCAL DWARF GALAXIES:BUILDING BLOCKS OFMASSIVE ONES? I.THE FORNAX DWARF GALAXY

Odessa Astronomical Publications, 2008
A chemical evolution of the Local Group dwarf galaxy Fornax is considered in the framework of the merger scenario. We suppose a galactic stellar halo to be formed as separate fragments which then merge; thus, we can calculate the set of such the ...
T. V. Nykytyuk
doaj   +1 more source

How non-linear scaling relations unify dwarf and giant elliptical galaxies

, 2010
Dwarf elliptical galaxies are frequently excluded from bright galaxy samples because they do not follow the same linear relations in diagrams involving effective half light radii R_e or mean effective surface brightnesses _e.
A.W. Graham, Andredakis, Baldry, Begelman, Bender, Caon, Carter, Carter, Côté, Davies, Davies, de Rijcke, Djorgovski, D’Onofrio, Ebisuzaki, Emsellem, Falcón-Barroso, Ferrarese, Fisher, Gadotti, Gargiulo, Gavazzi, Graham, Graham, Graham, Graham, Graham, Graham, Graham, Graham, Graham, Greene, Held, Jerjen, Kormendy, Kormendy, Kormendy, Krajnović, La Barbera, Matković, Merritt, Metcalfe, Peletier, Skelton, Tolstoy, Trujillo, Young, Young, Zaritsky   +48 more
core   +1 more source

The Morphological Origin of Dwarf Galaxies [PDF]

EAS Publications Series, 2011
13 pages, 5 figures, to appear in the proceedings of the CRAL conference, Lyon, June 2010, "A Universe of Dwarf Galaxies", eds. Philippe Prugniel & Mina Koleva; EDP Sciences in the European Astronomical Society Publications Series. (invited talk)
openaire   +4 more sources

Dark-matter-free Dwarf Galaxy Formation at the Tips of the Tentacles of Jellyfish Galaxies

The Astrophysical Journal
When falling into a galaxy cluster, galaxies experience a loss of gas due to ram pressure stripping. In particular, disk galaxies lose gas from their disks, and very large tentacles of gas can be formed.
V. Lora, R. Smith, J. Fritz, A. Pasquali, A. C. Raga   +4 more
doaj   +1 more source

Angular Momentum in Dwarf Galaxies

Open Astronomy, 2014
AbstractWe study the “angular momentum catastrophe” in the framework of interaction among baryons and dark matter through dynamical friction. By means of Del Popolo (2009) model we simulate 14 galaxies similar to those investigated by van den Bosch, Burkert and Swaters (2001), and calculate the distribution of their spin parameters and the angular ...
openaire   +5 more sources

The origin of the mu_e - M_B and Kormendy relations in dwarf elliptical galaxies

, 2008
The present work is aimed at studying the distribution of galaxies of different types and luminosities along different structural scaling relations to see whether massive and dwarf ellipticals have been shaped by the same formation process. This exercise
A. Boselli, Barazza, Bender, Binggeli, Boissier, Boissier, Boissier, Boselli, Boselli, Boselli, Boselli, Boselli, Boselli, Bower, Capaccioli, Conselice, Côté, De Lucia, Djorgovski, Dressler, Faber, Ferguson, G. Gavazzi, Gavazzi, Gavazzi, Gavazzi, Gavazzi, Gavazzi, Gavazzi, Graham, Gunn, Haines, Haines, Kormendy, Kormendy, L. Cortese, Lisker, Lisker, Lisker, Lisker, Lisker, Mastropietro, Mayer, Michielsen, Mo, Penny, Renzini, S. Boissier, Smith, Smith Castelli, Thomas, Tully, Tully, Van Zee, Visvanathan, Vollmer, Zaritsky   +56 more
core   +1 more source