Results 71 to 80 of about 1,140 (187)

Rotating shallow water modeling of planetary,astrophysical and plasma vortical structures (plasma transport across a magnetic field,model of the jupiter's GRS, prediction of existence of giant vortices in spiral galaxies)

Discrete Dynamics in Nature and Society, 1999
Three kinds of results have been described in this paper. Firstly, an experimental study of the Rossby vortex meridional drift on the rotating shallow water has been carried out.
M. V. Nezlin, A. Yu Rylov, E. N. Snezhkin, K. B. Titishov, G. P. Chernikov   +4 more
doaj   +1 more source

Active Galactic Nuclei in the Green Valley at z ∼ 0.7

The Astrophysical Journal
We present near-infrared (NIR) spectroscopy using the MMT and Magellan infrared spectrograph for a sample of 29 massive galaxies ( $\mathrm{log}\ {M}_{* }/{M}_{\odot }\gtrsim 10$ ) at z ∼ 0.7 with optical spectroscopy from the Large Early Galaxy ...
Charity Woodrum, Christina C. Williams, Marcia Rieke, Kevin N. Hainline, Raphael E. Hviding, Zhiyuan Ji, Robert Kennicutt, Christopher N. A. Willmer   +7 more
doaj   +1 more source

Causal Discovery in Astrophysics: Unraveling Supermassive Black Hole and Galaxy Coevolution

The Astrophysical Journal
Correlation does not imply causation, but patterns of statistical association between variables can be exploited to infer a causal structure (even with purely observational data) with the burgeoning field of causal discovery.
Zehao Jin, Mario Pasquato, Benjamin L. Davis, Tristan Deleu, Yu Luo, Changhyun Cho, Pablo Lemos, Laurence Perreault-Levasseur, Yoshua Bengio, Xi Kang, Andrea Valerio Macciò, Yashar Hezaveh   +11 more
doaj   +1 more source

Age of Massive Galaxies at Redshift 8

The Astrophysical Journal
Recent James Webb Space Telescope data analyses have shown that massive red galaxies existed at redshifts z ≳ 6, a discovery that is difficult to understand in the context of standard cosmology (ΛCDM).
M. López-Corredoira, F. Melia, J.-J. Wei, C.-Y. Gao   +3 more
doaj   +1 more source

Astrophysics: The slow death of red galaxies.

Nature, 2015
For most galaxies, the shutdown of star formation was a slow process that took 4 billion years. An analysis of some 27,000 galaxies suggests that 'strangulation' by their environment was the most likely cause.
openaire   +3 more sources

The causal structure of galactic astrophysics

The Open Journal of Astrophysics
Data-driven astrophysics currently relies on the detection and characterisation of correlations between objects' properties, which are then used to test physical theories that make predictions for them.
Harry Desmond, Joseph Ramsey
doaj   +1 more source

Measurements of Cosmic Magnetism with LOFAR and SKA [PDF]

Advances in Radio Science, 2007
The origin of magnetic fields in stars, galaxies and clusters is an open problem in astrophysics. The next-generation radio telescopes <i>Low Frequency Array (LOFAR)</i> and <i>Square Kilometre Array (SKA)</i> will revolutionize ...
R. Beck
doaj  

The Mitchell Spectrograph: Studying Nearby Galaxies with the VIRUS Prototype

Advances in Astronomy, 2013
The Mitchell Spectrograph (a.k.a. VIRUS-P) on the 2.7 m Harlan J. Smith telescope at McDonald Observatory is currently the largest field of view (FOV) integral field unit (IFU) spectrograph in the world (1.7′×1.7′). It was designed as a prototype for the
Guillermo A. Blanc
doaj   +1 more source

A case for radio galaxies as the sources of IceCube's astrophysical neutrino flux [PDF]

Journal of Cosmology and Astroparticle Physics, 2016
15 pages, 4 ...
openaire   +2 more sources

The LEGA-C galaxy survey: Multiple quenching channels for quiescent galaxies at z ∼ 1

Astronomy & Astrophysics
Aims. We analyzed the sizes and star formation histories (SFHs) of 2908 galaxies with M★ ≥ 109 M⊙ at 0.6 
Nersesian Angelos, Kaushal Yasha, Martorano Marco, van der Wel Arjen, Wu Po-Feng, Bezanson Rachel, Bell Eric F., D’Eugenio Francesco, Gallazzi Anna R., Leja Joel, Zibetti Stefano, Tacchella Sandro   +11 more
doaj   +1 more source