Results 161 to 170 of about 89,941 (303)

Commodity risk assessment of Populus alba, Populus nigra and Populus tremula plants from the UK

open access: yesEFSA Journal, Volume 23, Issue 3, March 2025.
Abstract The European Commission requested the EFSA Panel on Plant Health to prepare and deliver risk assessments for commodities listed in Commission Implementing Regulation (EU) 2018/2019 as ‘High risk plants, plant products and other objects’. This Scientific Opinion covers plant health risks posed by plants of Populus alba, Populus nigra and ...
EFSA Panel on Plant Health (PLH)   +32 more
wiley   +1 more source

JWST Imaging of the Closest Globular Clusters—V. The White Dwarfs Cooling Sequence of M4

open access: yesAstronomische Nachrichten, Volume 346, Issue 2, February 2025.
ABSTRACT We combine infrared (IR) observations collected by the James Webb Space Telescope with optical deep images by the Hubble Space Telescope taken ~20 years earlier to compute proper‐motion membership for the globular cluster (GC) M4 (NGC 6121) along its entire white dwarf (WD) cooling sequence (CS).
Luigi R. Bedin   +11 more
wiley   +1 more source

Simulations of the merging galaxy cluster Abell 3376

open access: yes, 2013
Observed galaxy clusters often exhibit X-ray morphologies suggestive of recent interaction with an infalling subcluster. Abell 3376 is a nearby (z=0.046) massive galaxy cluster whose bullet-shaped X-ray emission indicates that it may have undergone a ...
Machado, Rubens E. G.   +1 more
core   +1 more source

Luminous Red Galaxies in Clusters: Central Occupation, Spatial Distributions, and Mis-centering [PDF]

open access: yes, 2015
Luminous Red Galaxies (LRG) from the Sloan Digital Sky Survey are considered among the best understood samples of galaxies, and they are employed in a broad range of cosmological studies.
Hikage, Chiaki   +10 more
core   +2 more sources

XRISM Reveals Low Nonthermal Pressure in the Core of the Hot, Relaxed Galaxy Cluster A2029

open access: yesThe Astrophysical Journal Letters
We present XRISM Resolve observations of the core of the hot, relaxed galaxy cluster Abell 2029 (A2029). We find that the line-of-sight bulk velocity of the intracluster medium (ICM) within the central 180 kpc is at rest with respect to the brightest ...
XRISM Collaboration   +138 more
doaj   +1 more source

Superclusters of galaxies from the 2dF redshift survey. I. The catalogue

open access: yes, 2006
We use the 2dF Galaxy Redshift Survey data to compile catalogues of superclusters for the Northern and Southern regions of the 2dFGRS, altogether 543 superclusters at redshifts 0.009 < z < 0.2.
A. Knebe   +55 more
core   +2 more sources

Correlations in Relaxed Clusters of Galaxies

open access: yesOpen Astronomy, 2014
The correlations among different quantities in galaxy clusters, observed by Newman et al. (2013a,b), are investigated. We find an anti-correlation among the slope α, the effective radius, Re, and a correlation among the core radius rcore and Re. Moreover,
Babyk Iu., Del Popolo A.
doaj   +1 more source

Weak-lensing Characterization of the Dark Matter in 29 Merging Clusters that Exhibit Radio Relics

open access: yesThe Astrophysical Journal Supplement Series
We present a multiwavelength analysis of 29 merging galaxy clusters that exhibit radio relics. For each merging system, we perform a weak-lensing analysis on Subaru optical imaging.
Kyle Finner   +7 more
doaj   +1 more source

Simulating the formation of a proto-cluster at z~2

open access: yes, 2008
We present results from two high-resolution hydrodynamical simulations of proto-cluster regions at z~2.1. The simulations have been compared to observational results for the socalled Spiderweb galaxy system, the core of a putative proto-cluster region at
Borgani, S.   +5 more
core   +1 more source

Star Formation, Nebulae, and Active Galactic Nuclei in CLASH Brightest Cluster Galaxies. I. Dependence on Core Entropy of Intracluster Medium

open access: yesThe Astrophysical Journal
We set the stage for reassessing how star formation, emission-line nebulae, and active galactic nuclei (AGNs) in brightest cluster galaxies (BCGs) depend on the thermodynamics of the intracluster medium (ICM).
Arsen Levitskiy   +4 more
doaj   +1 more source

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