Results 61 to 70 of about 314,301 (152)

High Redshift Quasars, Emission Lines and ‘Cloudy’

Open Astronomy, 2011
I describe some of the outstanding “big picture” questions in quasar research and how the development of the plasma simulation code Cloudy is being guided to answer them.
Ferland Gary J.
doaj   +1 more source

The Connection between Star-Forming Galaxies, AGN Host Galaxies and Early-Type Galaxies in the SDSS

, 2007
We present a study of the connection between star-forming galaxies, AGN host galaxies, and normal early-type galaxies in the Sloan Digital Sky Survey (SDSS).
Busarello G., Changbom Park, Groves B., Ho Seong Hwang, Joon Hyeop Lee, Jorgensen I., Kewley L. J., Myung Gyoon Lee, Taehyun Kim, Yun-Young Choi   +9 more
core   +1 more source

CANDELS Observations Of The Structural Properties Of Cluster Galaxies At Z=1.62 [PDF]

, 2012
We discuss the structural and morphological properties of galaxies in a z = 1.62 proto-cluster using near-IR imaging data from Hubble Space Telescope Wide Field Camera 3 data of the Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey (CANDELS).
Bassett, Robert, Bell, Eric F., Conselice, Christopher J., Dekel, Avishai, Dunlop, J. S., Faber, S. M., Farrah, D., Ferguson, Henry C., Finkelstein, Keely D., Finkelstein, Steven L., Guo, Y. C., Haussler, Boris, Kocevski, D. D., Koekemoer, A. M., Koo, D. C., Lotz, Jennifer M., McGrath, E. J., McIntosh, Daniel H., McLure, R. J., Momcheva, I., Newman, Jeffrey A., Papovich, Casey, Rudnick, Gregory, Tran, K. V., van der Wel, A., Weiner, B., Willmer, Christopher N. A., Wuyts, S.   +27 more
core   +1 more source

Separating the Spectral Counterparts in NGC 1275/Perseus Cluster in X-Rays

Astronomy
We present a model-independent method for separating the spectral counterparts of the active galactic nucleus (AGN) NGC 1275 from the surrounding emission of the Perseus cluster, as observed by Suzaku/XIS cameras.
Elena Fedorova, Lidiia Zadorozhna, Anatolii Tugay, Nadiia Pulatova, Alexander Ganz, Olexandr Gugnin   +5 more
doaj   +1 more source

Conference “Modern Stellar Astronomy 2017”

Open Astronomy, 2017
Here we give a brief overview on the eighth annual conference on Modern Stellar Astronomy held in the Ural FederalUniversity (Ekaterinbourg, Russia) in June 2017, to commemorate the 100th birthday of Prof. K. Barkhatova (1917-1990).
Malkov Oleg Yu., Rastorguev Alexey S.
doaj   +1 more source

Comparing galaxy populations in compact and loose groups of galaxies

, 2012
We perform a comparison of the properties of galaxies in compact groups, loose groups and in the field to deepen our understanding of the physical mechanisms acting upon galaxy evolution in different environments. We select samples of galaxies in compact
Abadi, Abazajian, Adelman-McCarthy, Baldry, Balogh, Balogh, Beers, Bernardi, Bitsakis, Blanton, Blanton, Brasseur, Choloniewski, Coenda, Coenda, Colless, Cortese, Deng, Deng, Diaferio, Dressler, Díaz-Giménez, Eke, Gerke, Goto, Gunn, H. J. Martínez, H. Muriel, Hansen, Hickson, Hickson, Huchra, Iovino, Johnson, Kawata, Larson, Lee, Limber, Lynden-Bell, Maltby, Martínez, Martínez, Martínez, Martínez, Martínez, McConnachie, McConnachie, McGee, McGee, Mendel, Mendes de Oliveira, Merchán, Merchán, Moore, Moore, Nair, Oemler, Petrosian, Rasmussen, Sandage, Sandage, Sandage, Schechter, Schlegel, Schmidt, Shen, Springel, Strateva, Strauss, Taylor, Toomre, Torres-Flores, Tovmassian, Tzanavaris, V. Coenda, von der Linden, Walker, Weinmann, Weinmann, Wilman, Yang, York, Zandivarez   +82 more
core   +1 more source

Large scale hydrodynamic modes of oscillations in gaseous disks of flat galaxies with a kink on rotation curves

Open Astronomy, 2018
The properties of unstable large-scale hydrodynamic (HD) modes of oscillations in the gaseous disk of a flat galaxy with a rotation curve having a velocity jump in the inner region of the disk are numerically investigated.
Torgashin Yury, Omurkanov Turgunbek
doaj   +1 more source

A Possible Origin of Magnetic Fields in Galaxies and Clusters: Strong Magnetic fields at z~10?

, 2005
We propose that strong magnetic fields should be generated at shock waves associated with formation of galaxies or clusters of galaxies by the Weibel instability, an instability in collisionless plasmas.
Fujita, Yutaka, Kato, Tsunehiko N.
core   +1 more source

Alignment of galaxies relative to their local environment in SDSS-DR8

, 2016
We study the alignment of galaxies relative to their local environment in SDSS-DR8 and, using these data, we discuss evolution scenarios for different types of galaxies. We defined a vector field of the direction of anisotropy of the local environment of
Einasto, M., Hirv, A., Pelt, J., Saar, E., Tago, E., Tamm, A., Tempel, E.   +6 more
core   +1 more source

Weighing Cosmological Models with SNe Ia and Gamma Ray Burst Redshift Data

Universe, 2019
Many models have been proposed to explain the intergalactic redshift using different observational data and different criteria for the goodness-of-fit of a model to the data. The purpose of this paper is to examine several suggested models using the same
Rajendra P. Gupta
doaj   +1 more source