Results 111 to 120 of about 65,614 (266)

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

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

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

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

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

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

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

Stellar Populations in the Local Group of Galaxies

, 2005
The characteristics and properties of the stellar populations and evolutionary histories of Local Group galaxies are summarized and compared to predictions of cosmological models.
Grebel, Eva K.
core   +2 more sources

The Ecosystem Of Dwarf Galaxies

, 2017
It remains unclear what physical mechanisms are triggering starbursts in low-mass galaxies and what is the effect of stellar feedback in their shallow potential wells. We study a sample of 18 nearby starburst dwarfs using multi-wavelength data, including interferometric HI observations, HST imaging, and MUSE integral-field spectroscopy.
openaire   +1 more source

The Star Formation History in Local Group Galaxies. I. Ten Dwarf Galaxies

The Astrophysical Journal
The star formation histories (SFHs) of galaxies provide valuable insights into galaxy evolution and stellar physics. Understanding the SFHs enables the study of chemical enrichment of galaxies, star formation triggered by interactions, and the behavior ...
Yi Ren, Biwei Jiang, Yuxi Wang, Ming Yang, Zhiqiang Yan   +4 more
doaj   +1 more source