Results 91 to 100 of about 162,871 (277)

The 2dF Galaxy Redshift Survey: the clustering of galaxy groups [PDF]

Monthly Notices of the Royal Astronomical Society, 2004
16 pages.
Terry J. Bridges, Peder Norberg, Chris A. Collins, Richard S. Ellis, Matthew Colless, Joss Bland-Hawthorn, Russell D. Cannon, Darren Madgwick, George Efstathiou, Ivan K. Baldry, Simon P. Driver, Carlos S. Frenk, Nelson D. Padilla, Gavin Dalton, Gavin Dalton, Warrick J. Couch, Stephen J. Maddox, Darren J. Croton, Keith Taylor, Vincent R. Eke, Roberto De Propris, Ian Lewis, Carlton M. Baugh, Carole Jackson, Stuart Lumsden, Ofer Lahav, William J. Sutherland, William J. Sutherland, Karl Glazebrook, Bruce A. Peterson, Shaun Cole, John A. Peacock   +31 more
openaire   +8 more sources

Exploring Dark Photon Production and Kinetic Mixing Constraints in Heavy‐Ion Collisions

Astronomische Nachrichten, EarlyView.
ABSTRACT Vector U‐bosons, often referred to as “dark photons,” are potential candidates for mediating dark matter interactions. In this study, we outline a procedure to derive theoretical constraints on the upper bound of the kinetic mixing parameter ϵ2MU$$ {\upvarepsilon}^2\left({M}_U\right) $$ using dilepton data from heavy‐ion from SIS to RHIC ...
Adrian William Romero Jorge, Elena Bratkovskaya, Taesoo Song, Laura Sagunski   +3 more
wiley   +1 more source

Galaxy Assembly Bias in the Stellar-to-halo Mass Relation for Red Central Galaxies from SDSS

The Astrophysical Journal
We report evidence of galaxy assembly bias—the correlation between galaxy properties and biased secondary halo properties at fixed halo mass ( M _H )—in the stellar-to-halo mass relation for red central galaxies from the Sloan Digital Sky Survey.
Grecco A. Oyarzún, Jeremy L. Tinker, Kevin Bundy, Enia Xhakaj, J. Stuart B. Wyithe   +4 more
doaj   +1 more source

Optical Observations of M81 Galaxy Group in Narrow Band [SII] and H_alpha Filters: Holmberg IX [PDF]

Serbian Astronomical Journal, 2009
We present observations of the nearby tidal dwarf galaxy Holmberg IX in M81 galaxy group in narrow band [SII] and H$alpha$ filters, carried out in March and November 2008 with the 2m RCC telescope at NAO Rozhen, Bulgaria.
Arbutina, B., Ilić, D., Stavrev, K., Urošević, D., Vukotić, B., Onić, D.   +5 more
doaj  

Shock Enhanced [C ii] Emission from the Infalling Galaxy Arp 25

The Astrophysical Journal, 2023
We present SOFIA observations with HAWC+ and FIFI-LS of the peculiar galaxy Arp 25, also known as NGC 2276 or UGC 3740, whose morphology is deformed by its impact with the intragroup medium of the NGC 2300 galaxy group.
Dario Fadda, Jessica S. Sutter, Robert Minchin, Fiorella Polles   +3 more
doaj   +1 more source

Are Brightest Halo Galaxies Central Galaxies?

, 2011
It is generally assumed that the central galaxy in a dark matter halo, that is, the galaxy with the lowest specific potential energy, is also the brightest halo galaxy (BHG), and that it resides at rest at the centre of the dark matter potential well ...
Adelman-McCarthy, Aubert, Bailin, Baldry, Beers, Beers, Bell, Berlind, Bernstein, Bildfell, Binney, Bird, Blanton, Blanton, Blanton, Boylan-Kolchin, Cacciato, Carlberg, Cohn, Colless, Collister, Conroy, Conroy, Conroy, Cooray, Cooray, Corless, Coziol, Croton, de Vaucouleurs, Fabio Fontanot, Font, Frank C. van den Bosch, Giocoli, Guo, Guo, Hansen, Hansen, Hernquist, Houjun Mo, Hwang, Kang, Kimm, Kochanek, Koester, Koopmans, Li, Lin, Lin, Lo, Macciò, Malumuth, Mandelbaum, McKay, Monaco, Monaco, More, Moster, Navarro, Oegerle, Pasquali, Pasquali, Postman, Ramin A. Skibba, Reid, Richard, Rusin, Sanderson, Saunders, Schlegel, Scoccimarro, Shankar, Sheldon, Sheldon, Sheth, Sheth, Skibba, Skibba, Skibba, Skibba, Strauss, Surhud More, Tegmark, Tinker, Vale, van den, van den, van den, van den, van den, Vitvitska, von, Wang, Wang, Weinmann, Weinmann, Wetzel, White, Xiaohu Yang, Yang, Yang, Yang, Yang, Yang, Yang, Yang, Yang, Yang, York, Yoshikawa, Zabludoff, Zaritsky, Zehavi, Zehavi, Zheng   +114 more
core   +1 more source

Isolated Galaxies, Pairs and Groups of Galaxies [PDF]

International Astronomical Union Colloquium, 1990
We searched for isolated galaxies, pairs and groups of galaxies in the CfA survey (Huchra et al. 1983). It was assumed that the distances to galaxies are given by R = V/H0, where H0 = 100 km s−1 Mpc−1 and R> 6 Mpc.
I. Kuneva, M. Kalinkov
openaire   +2 more sources

Non‐thermal plasma decontamination of microbes: a state of the art

Biotechnology Progress, EarlyView.
Abstract Microbial decontamination is a critical concern in various sectors, from healthcare to food processing. Traditional decontamination methods, while effective to a degree, present limitations in terms of environmental impact, efficiency, and potential harm to the target material. This review investigates the emerging realm of non‐thermal plasma (
Yiyi Xu, Amarjeet Bassi
wiley   +1 more source

The Globular Cluster System of the Galaxy NGC 6876

Galaxies, 2017
We present preliminary results of the deep photometric study of the elliptical galaxy NGC 6876, located at the center of the Pavo group, and its globular cluster system.
Ana Inés Ennis, Lilia Patricia Bassino, Juan Pablo Caso   +2 more
doaj   +1 more source

Evolution of Group Galaxies from the First Red-Sequence Cluster Survey

, 2012
We study the evolution of the red galaxy fraction (f_red) in 905 galaxy groups with 0.15 < z < 0.52. The galaxy groups are identified by the `probability Friends-of-Friends' algorithm from the first Red-Sequence Cluster Survey (RCS1) photometric-redshift
B. C. Hsieh, Balogh, Balogh, Barkhouse, Bartelmann, Bell, Berlind, Bower, Carlberg, Cassata, Cowie, D'Agostini, Ellingson, Ellis, Fukugita, Gerke, Giavalisco, Gilbank, Gladders, Gladders, Gladders, Goto, Gómez, H. K. C. Yee, Hashimoto, Hsieh, I. H. Li, Kawata, Knobel, Kodama, Kodama, Li, Li, Lilly, Longair, M. Gladders, Madau, Martínez, Mulchaey, Peng, Poggianti, Poggianti, Quadri, Robotham, Stanford, Tanaka, Vogt, Wilman, Yee, Yee, Yee, Yee   +51 more
core   +1 more source