Results 31 to 40 of about 2,413,471 (156)

Global Continuation of a Vlasov Model of Rotating Galaxies [PDF]

arXiv, 2022
A typical galaxy consists of a huge number of stars attracted to each other by gravity. For instance, the Milky Way has about $10^{11}$ stars. Thus it is typically modeled by the Vlasov-Poisson system. We prove an existence theorem for axisymmetric steady states of galaxies that may rotate rapidly.
arxiv  

The cosmological constant derived via galaxy groups and clusters [PDF]

Eur Phys J C, 79: 169 (2019), 2019
The common nature of dark matter and dark energy is argued in [1] based on the approach that the cosmological constant \Lambda enters the weak-field General Relativity following from Newton theorem on the "sphere-point mass" equivalency [2]. Here we probe the \Lambda-gravity description of dark matter in galaxy systems, from pairs up to galaxy clusters
arxiv   +1 more source

Tracing the Mass-Assembly History of Galaxies with Deep Surveys

, 2007
We use the optical and near-infrared galaxy samples from the Munich Near-Infrared Cluster Survey (MUNICS), the FORS Deep Field (FDF) and GOODS-S to probe the stellar mass assembly history of field galaxies out to z ~ 5.
A. Cimatti, A. Gabasch, E. Bell, G. Feulner, G. Feulner, G. Feulner, H.-W. Chen, J. Heidt, L.L. Cowie, N. Drory, N. Drory, N. Drory, P. Saracco, P. Saracco   +13 more
core   +3 more sources

Extragalactic Relativistic Jets and Nuclear Regions in Galaxies [PDF]

, 2006
Past years have brought an increasingly wider recognition of the ubiquity of relativistic outflows (jets) in galactic nuclei, which has turned jets into an effective tool for investigating the physics of nuclear regions in galaxies.
A. Pedlar, A.B. Peck, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Lobanov, A.P. Marscher, C. Fendt, C.G. Mundell, D.L. Meier, E. Ros, H. Falcke, H.R. Klöckner, I. Agudo, J.A. Zensus, J.E. Conway, J.L. Góomez, J.R. Goikoechea, K.I. Kellermann, M. Hujeirat, M. Kadler, M. Perucho, M. Perucho, M. Perucho, M. Sikora, M.L. Lister, N. Vlahakis, R.C. Walker, S. Koide, S.C. Unwin, S.G. Jorstad, S.S. Komissarov, V. Semenov, W. Junor   +37 more
core   +3 more sources

Studies of Seyfert galaxies in Fesenkov Astrophysical Institute

Communications of the Byurakan Astrophysical Observatory, 2020
This article provides an overview of the main research results of a large group of Seyfert galaxies, carried out at Fesenkov Astrophysical Institute (FAI) over the past 50 years. Spectral observations have been performed since 1970. At an early stage, a three cascade image-tube (UM-92) was used as a radiation receiver.
M. Krugov, B. Omar, Ch. T. Omarov, E. K. Denissyuk, S. A. Shomshekova, R. R. Valiullin   +5 more
openaire   +2 more sources

THE THEORETICAL ASTROPHYSICAL OBSERVATORY: CLOUD-BASED MOCK GALAXY CATALOGS* [PDF]

The Astrophysical Journal Supplement Series, 2016
ABSTRACT We introduce the Theoretical Astrophysical Observatory (TAO), an online virtual laboratory that houses mock observations of galaxy survey data. Such mocks have become an integral part of the modern analysis pipeline. However, building them requires expert knowledge of galaxy modeling and simulation techniques, significant ...
Amr H. Hassan, Gregory B. Poole, Gregory B. Poole, Maksym Bernyk, Darren J. Croton, Sarah E. Hegarty, Alan R. Duffy, Thibault Garel, Thibault Garel, C. Tonini, C. Tonini, Simon J. Mutch, Simon J. Mutch, Luke Hodkinson   +13 more
openaire   +8 more sources

The slow death of red galaxies [PDF]

Nature, 2015
This a nearly final draft of a News and Views appeared on Nature in May 2015. It also summarises the content of the talk "Shutdown and downsizing" that I presented at the EWASS meeting "How galaxies live and die: the onset and end of star formation across cosmic time" (Athens, Greece, 6th July 2016)
openaire   +7 more sources

GASP XXIII: A Jellyfish Galaxy as an Astrophysical Laboratory of the Baryonic Cycle [PDF]

The Astrophysical Journal, 2019
Abstract With MUSE, Chandra, VLA, ALMA, and UVIT data from the GASP program, we study the multiphase baryonic components in a jellyfish galaxy (JW100) with a stellar mass 3.2 × 1011 M ⊙ hosting an active galactic nucleus (AGN).
Elke Roediger, Stephanie Tonnesen, Koshy George, Koshy George, Koshy George, Mario Radovich, Rosita Paladino, Fabrizio Brighenti, Fabrizio Brighenti, Daniela Bettoni, Callum Bellhouse, Andrea Biviano, Bianca M. Poggianti, Jacopo Fritz, Alessia Moretti, A. Ignesti, A. Ignesti, Neven Tomičić, Benedetta Vulcani, Yara L. Jaffé, Myriam Gitti, Myriam Gitti, Marco Gullieuszik, Anna Wolter, Alessandro Omizzolo, Andrea Franchetto, Andrea Franchetto   +26 more
openaire   +7 more sources

Exploring galaxies-gravitational waves cross-correlations as an astrophysical probe [PDF]

Journal of Cosmology and Astroparticle Physics, 2020
Gravitational waves astronomy has opened a new opportunity to study the Universe. Full exploitation of this window can especially be provided by combining data coming from gravitational waves experiments with luminous tracers of the Large Scale Structure, like galaxies.
Scelfo G., Boco L., Lapi A., Viel M.
openaire   +3 more sources

Photometric and kinematical study of nearby groups of galaxies around IC 65 and NGC 6962 [PDF]

, 2006
We discuss the structure, galaxy content and kinematics of a sparse, probably collapsing group around IC 65 and an evolved rich group around NGC 6962Comment: Poster contribution on 2 pages with 2 figures to be published in ESO Astrophysics Symposia ...
Tago, E., Vennik, J.
core   +2 more sources