Results 31 to 40 of about 142,796 (289)

CHOIRS H I GALAXY GROUPS: THE METALLICITY OF DWARF GALAXIES [PDF]

The Astrophysical Journal, 2014
We present a recalibration of the luminosity-metallicity relation for gas-rich, star-forming dwarfs to magnitudes as faint as M-R similar to -13. We use the Dopita et al. metallicity calibrations to calibrate the relation for all the data in this analysis.
Sweet, Sarah M., Drinkwater, Michael J., Meurer, Gerhardt, Bekki, Kenji, Dopita, Michael A., Kilborn, Virginia, Nicholls, David C.   +6 more
openaire   +3 more sources

The zCOSMOS redshift survey: how group environment alters global downsizing trends [PDF]

, 2009
Context. Groups of galaxies are a common environment, bridging the gap between starforming field galaxies and quiescent cluster galaxies. Within groups secular processes could be at play, contributing to the observed strong decrease of star formation ...
Abbas, U., Bardelli, S., Bolzonella, M., Bongiorno, A., Bottini, D., Cappi, A., Caputi, K., Carollo, C. M., Cassata, P., Cimatti, A., Contini, T., Coppa, G., Cucciati, O., de la Torre, S., de Ravel, L., Finoguenov, A., Franzetti, P., Garilli, B., Guzzo, L., Halliday, C., Iovino, A., Kampczyk, P., Kneib, J.-P., Knobel, C., Koekemoer, A. M., Kovač, K., Lamareille, F., Le Borgne, J.-F., Le Brun, V., Le Fèvre, O., Leauthaud, A., Lilly, S., Maccagni, D., Maier, C., Mainieri, V., Marinoni, C., McCracken, H. J., Memeo, P., Meneux, B., Mignoli, M., Oesch, P., Pellò, R., Peng, Y., Porciani, C., Pozzetti, L., Pérez-Montero, E., Renzini, A., Ricciardelli, E., Scaramella, R., Schiminovich, D., Scodeggio, M., Scoville, N., Silverman, J. D., Tanaka, M., Tasca, L. A. M., Tresse, L., Vergani, D., Zamorani, G., Zucca, E.   +58 more
core   +6 more sources

A statistical study of the luminosity gap in galaxy groups

, 2010
The luminosity gap between the two brightest members of galaxy groups and clusters is thought to offer a strong test for the models of galaxy formation and evolution.
Ghanbari, Jamshid, Khosroshahi, Habib G., Koohpaee, Ali, Rahmani, Hadi, Tavasoli, Saeed   +4 more
core   +1 more source

The Environmental Dependence of the Evolving S0 Fraction [PDF]

, 2010
We reinvestigate the dramatic rise in the S0 fraction, f_S0, within clusters since z ~ 0.5. In particular, we focus on the role of the global galaxy environment on f_S0 by compiling, either from our own observations or the literature, robust line-of ...
Andreon, Balogh, Balogh, Bekki, Christlein, Couch, Couch, David J. Sand, Dennis W. Just, Dennis Zaritsky, Desai, Dressler, Fasano, Finn, Gregory Rudnick, Hinz, Icke, Kannappan, Kautsch, Kendall, Mihos, Moore, Moran, Papovich, Poggianti, Poggianti, Poggianti, Postman, Sandage, Smail, Smith, Tran, Vandana Desai, Wechsler, Wilman, Yang, Yang, Zabludoff, Zabludoff   +38 more
core   +2 more sources

Galaxy Quenching with Mass Growth History of Galaxy Groups and Clusters: The Importance of Post-processing

The Astrophysical Journal, 2023
We investigate the fraction of quenched satellite galaxies in host galaxy groups and clusters using TNG300 in the IllustrisTNG cosmological magnetohydrodynamical simulations.
So-Myoung Park, Kyungwon Chun, Jihye Shin, Hyunjin Jeong, Joon Hyeop Lee, Mina Pak, Rory Smith, Jae-Woo Kim   +7 more
doaj   +1 more source

Groups of Galaxies [PDF]

Highlights of Astronomy, 1977
I would like to report on some work that Ed Turner and I have done on groups of galaxies and how groups may be used to obtain useful cosmological information. Of course the classic study of groups of galaxies was done by de Vaucouleurs (1975) who made a catalogue of groups and loose associations of galaxies in the local supercluster. Partly to obtain a
openaire   +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   +1 more source

Using member galaxy luminosities as halo mass proxies of galaxy groups

, 2015
Reliable halo mass estimation for a given galaxy system plays an important role both in cosmology and galaxy formation studies. Here we set out to find the way that can improve the halo mass estimation for those galaxy systems with limited brightest ...
Lu, Yi, Shen, Shiyin, Yang, Xiaohu
core   +1 more source

A ROSAT survey of Hickson's compact galaxy groups [PDF]

, 1996
We report the results of an almost complete survey of the X-ray properties of Hickson's compact galaxy groups with the ROSAT PSPC. Diffuse X-ray emission is detected from 22 groups.
Bohringer, H., Bourner, P. D., Ebeling, H., Ponman, T. J.   +3 more
core   +3 more sources

Observational Evidence for an Age Dependence of Halo Bias

, 2006
We study the dependence of the cross-correlation between galaxies and galaxy groups on group properties. Confirming previous results, we find that the correlation strength is stronger for more massive groups, in good agreement with the expected mass ...
Frank C. van den Bosch, Gao L., H. J. Mo, Mo H. J., Weinmann S. M., Xiaohu Yang   +5 more
core   +2 more sources