Results 91 to 100 of about 129,169 (226)

The Complex Multiwavelength Morphology of the Peculiar Compact Galaxy Group IC 2431

The Astrophysical Journal
We present new Chandra X-ray imaging spectroscopy of the compact galaxy group IC 2431, and compare with archival ultraviolet, optical, infrared, and radio images. IC 2431 is a starburst system containing three tidally distorted disk galaxies.
Beverly J. Smith, Roberto Soria, Douglas A. Swartz, Mark L. Giroux, Curtis Struck, Ryan Urquhart   +5 more
doaj   +1 more source

The LOFAR sub-arcsecond view of the high-redshift radio relic in PSZ2 G091.83+26.11

Astronomy & Astrophysics
Context. Enhanced inverse Compton losses at high redshift are expected to steepen the spectrum of diffuse radio sources in galaxy clusters, making low-frequency (ν ∼ 100 MHz) observations favourable.
Di Gennaro G., Timmerman R., Hoeft M., de Gasperin F., van Weeren R. J., Botteon A., Brüggen M., de Jong J. M. G. H. J., Shimwell T. W., Sweijen F., Brunetti G., Cassano R., De Rubeis E., Forman W., Röttgering H. J. A., Simionescu A., Ye H.   +16 more
doaj   +1 more source

High-energy Neutrino Constraints on Cosmic-Ray Reacceleration in Radio Halos of Massive Galaxy Clusters

The Astrophysical Journal, 2023
A fraction of merging galaxy clusters host diffuse radio emission in their central region, termed a giant radio halo (GRH). The most promising mechanism of GRHs is the reacceleration of nonthermal electrons and positrons by merger-induced turbulence ...
Kosuke Nishiwaki, Katsuaki Asano, Kohta Murase   +2 more
doaj   +1 more source

Diffuse steep-spectrum sources from the 74 MHz VLSS survey

, 2011
Galaxy clusters grow by a sequence of mergers with other clusters and galaxy groups. During these mergers, shocks and/or turbulence are created within the intracluster medium (ICM).
Abazajian, Axford, Baars, Bacchi, Bagchi, Bagchi, Battaglia, Becker, Bell, Bell, Blandford, Blandford, Blasi, Bonafede, Bonafede, Brentjens, Brunetti, Brunetti, Burns, Chandra, Clarke, Cohen, Condon, Cornwell, de Vries, Dennison, Dolag, Drury, Dwarakanath, Ensslin, Enßlin, Enßlin, Ferrari, Giovannini, Giovannini, Giovannini, Gitti, Gitti, Gitti, Govoni, Govoni, Green, H. J. A. Röttgering, Haynes, Higgs, Hoeft, Hoeft, Joncas, Jones, Kempner, Koester, Krymskii, M. Brüggen, Macario, Malkov, Miley, Miniati, Murgia, Petrosian, Pfrommer, R. J. van Weeren, Rengelink, Röttgering, Schlegel, Shen, Skillman, Slee, Slinglend, Snellen, Struble, van Weeren, van Weeren, van Weeren, van Weeren, Venturi, Venturi, Voges, Voges, Wardle, Willott, Zanichelli   +80 more
core   +1 more source

On dynamical models for radio galaxies [PDF]

New Astronomy Reviews, 2002
The tailed radio galaxies that have been called ``Type I'' are not a uniform set. To study their dynamics, we have used the Ledlow-Owen data set, which provides a new sample of 250 radio galaxies in nearby Abell clusters. These sources divide into two clear categories based on their radio morphology.
Eilek, J., Hardee, P., Markovic, T., Ledlow, M., Owen, F.   +4 more
openaire   +2 more sources

Story2Board: A Training‐Free Approach for Expressive Visual Storytelling

Computer Graphics Forum, EarlyView.
Abstract We present Story2Board, a training‐free framework for expressive storyboard generation from natural language. Existing methods narrowly focus on subject identity, overlooking key aspects of visual storytelling such as spatial composition, background evolution, and narrative pacing.
D. Dinkevich, M. Levy, O. Avrahami, D. Samuel, D. Lischinski   +4 more
wiley   +1 more source

A Deep Dive into the NGC 741 Galaxy Group: Insights into a Spectacular Head-tail Radio Galaxy from VLA, MeerKAT, uGMRT, and LOFAR

The Astrophysical Journal
We present deep, wideband multifrequency radio observations (144 MHz−8 GHz) of the remarkable galaxy group NGC 741, which yield crucial insights into the interaction between the infalling head-tail radio galaxy (NGC 742) and the main group.
K. Rajpurohit, E. O’Sullivan, G. Schellenberger, M. Brienza, J. M. Vrtilek, W. Forman, L. P. David, T. Clarke, A. Botteon, F. Vazza, S. Giacintucci, C. Jones, M. Brüggen, T. W. Shimwell, A. Drabent, F. Loi, S. I. Loubser, K. Kolokythas, I. Babyk, H. J. A. Röttgering   +19 more
doaj   +1 more source

Fresh Activity in Old Systems: Radio AGN in Fossil Groups of Galaxies

, 2012
We present the first systematic 1.4 GHz Very Large Array radio continuum survey of fossil galaxy group candidates. These are virialized systems believed to have assembled over a gigayear in the past through the merging of galaxy group members into a ...
Bîrzan, Cisternas, Condon, Corbin, D'Onghia, David, De Robertis, Eric M. Wilcots, Jones, Kelley M. Hess, La Barbera, Mendes de Oliveira, Mendes de Oliveira, Mulchaey, Santos, Schawinski, Sun, Thomson, Tozzi, Ulmer, van Gorkom, Victoria L. Hartwick, Vikhlinin, White, Wise, Yamagata   +25 more
core   +1 more source

Spectroscopic confirmation of a galaxy cluster associated with 7C1756+6520 at z=1.416 [PDF]

, 2010
We present spectroscopic follow-up of an overdensity of galaxies photometrically selected to be at 1 ...
A. Galametz, Best, C. De Breuck, D. Stern, Daddi, Doherty, Eckart, Eisenhardt, Eisenhardt, F. A. Harrison, Galametz, Galametz, Gawiser, Gladders, Hayashi, Hilton, J. Vernet, Kajisawa, Kodama, Kodama, Lacy, Lidman, Massey, Mullis, Oke, Overzier, Quadri, R. L. Griffith, Rosati, S. A. Stanford, Seymour, Stanford, Stanford, Stern, Stern, Stern, Venemans, Vikhlinin, Wilson   +38 more
core   +2 more sources

Challenges in Bringing Pangenome Research Into Breeding: A Case Study in Rice

Plant Biotechnology Journal, EarlyView.
ABSTRACT Crop breeding has entered the pangenomics era, unlocking a far more comprehensive view of genetic diversity than a single reference genome can capture. In rice (Oryza sativa), a staple crop critical to global food security, the construction of pangenome resources has uncovered extensive structural variations (SVs), presence/absence variations (
Shuai Nie, Fangping Li, Risheng Li, Jian Wang, Yamei Ma, Chon Kit Kenneth Chan, Junliang Zhao, Haifei Hu   +7 more
wiley   +1 more source