Results 81 to 90 of about 67,078 (219)

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

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

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

Hiand CO in Blue Compact Dwarf Galaxies: Haro 2 and Haro 4 [PDF]

, 2004
H. Bravo–Alfaro, E. Brinks, A. J. Baker, Fabian Walter, D. Kunth   +4 more
openalex   +1 more source

A trio of new Local Group galaxies with extreme properties

, 2008
We report on the discovery of three new dwarf galaxies in the Local Group. These galaxies are found in new CFHT/MegaPrime g,i imaging of the south-western quadrant of M31, extending our extant survey area to include the majority of the southern ...
Alan W. McConnachie, Annette M. N. Ferguson, Avon Huxor, Geraint F. Lewis, Gregory Fahlman, Harvey Richer, Irwin M., Karachentsev I. D., Lynden-Bell D., Lynden-Bell D., Mike J. Irwin, Nial R. Tanvir, Nicolas F. Martin, Rodrigo A. Ibata, Salaris M., Scott C. Chapman, Sharina M. E.   +16 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

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

Core-collapse Supernovae from the Palomar Transient Factory: Indications for a Different Population in Dwarf Galaxies [PDF]

, 2010
We use the first compilation of 72 core-collapse supernovae (SNe) from the Palomar Transient Factory (PTF) to study their observed subtype distribution in dwarf galaxies compared to giant galaxies.
Arcavi, Iair, Bui, Khanh, Cooke, Jeff, Dekany, Richard, Hale, David, Henning, John, Kasliwal, Mansi M., Kulkarni, Shrinivas R., Law, Nicholas, McKenna, Dan, Ofek, Eran O., Quimby, Robert M., Rahmer, Gustavo, Smith, Roger, Velur, Viswa, Walters, Richard, Zolkower, Jeff   +16 more
core  

Hubble Space Telescope Survey of the Perseus Cluster: II. Photometric scaling relations in different environments

, 2008
We investigate the global photometric scaling relations traced by early-type galaxies in different environments, ranging from dwarf spheroidals, over dwarf elliptical galaxies, up to giant ellipticals (-8 mag > M_V > -24 mag).
Bender, Blitz, Buyle, C. J. Conselice, Caldwell, Carraro, Conselice, Conselice, Conselice, Couture, De Rijcke, De Rijcke, De Rijcke, De Rijcke, E. V. Held, Goto, Gourgoulhon, Graham, Graham, Grebel, Held, Irwin, Jerjen, Jerjen, Johnston, Kleyna, Kundu, Lewis, Lisker, Marcolini, Marcolini, Martin, Mateo, Mateo, Mateo, Matković, McConnachie, McConnachie, Michielsen, Mieske, Nagashima, Park, Peletier, Penny, Penny, Prugniel, Ricotti, S. De Rijcke, S. J. Penny, S. Valcke, Saviane, Schlegel, Sharina, Sirianni, Smith Castelli, Struble, Ségall, Tonry, Valcke, van Zee, Vazdekis, Weinmann, Young, Zucker, Łokas   +64 more
core   +2 more sources

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