Zobrazeno 1 - 10
of 617
pro vyhledávání: '"Merrifield M"'
To investigate how the radio-identified active galactic nuclei (AGN) fraction varies with cluster-centric radius, we present the projected and de-projected distributions of a large sample of LOFAR-identified radio AGN out to $30R_{500}$ around galaxy
Externí odkaz:
http://arxiv.org/abs/2410.13440
Autor:
Sampaio, V. M., de Carvalho, R. R., Aragón-Salamanca, A., Merrifield, M. R., Ferreras, I., Cornwell, D. J.
Galaxies infalling into clusters undergo both star-formation quenching and morphological transformation due to environmental effects. We investigate these processes and their timescales using a local sample of 20,191 cluster and 11,674 field galaxies
Externí odkaz:
http://arxiv.org/abs/2406.12273
In order to examine where, how and why the quenching of star formation begins in the outskirts of galaxy clusters, we investigate the de-projected radial distribution of a large sample of quenched and star-forming galaxies (SFGs) out to $30R_{500}$ a
Externí odkaz:
http://arxiv.org/abs/2406.02196
In this work, we use 8 years of deep near-infrared imaging to select and study a new set of 601 active galaxies identified through long-term near-infrared (NIR) variability in the UKIDSS Ultra Deep Survey (UDS). These objects are compared to 710 X-ra
Externí odkaz:
http://arxiv.org/abs/2405.14809
Autor:
Hartke, J., Arnaboldi, M., Gerhard, O., Ennis, A. I., Pulsoni, C., Coccato, L., Cortesi, A., Freeman, K. C., Kuijken, K., Merrifield, M., Napolitano, N.
Planetary nebulae (PNe) are excellent tracers of the metal-poor haloes of nearby early-type galaxies. They are commonly used to trace spatial distribution and kinematics of the halo and intracluster light at distances of up to 100 Mpcs. The results o
Externí odkaz:
http://arxiv.org/abs/2312.02587
Autor:
Sampaio, V. M., Aragón-Salamanca, A., Merrifield, M. R., de Carvalho, R. R., Zhou, S., Ferreras, I.
We exploit a sample of 80,000 SDSS central galaxies to investigate the effect of AGN feedback on their evolution. We trace the demographics of optically-selected AGN (Seyferts) as a function of their internal properties and environment. We find that
Externí odkaz:
http://arxiv.org/abs/2307.10435
The role of mass and environment in the build up of the quenched galaxy population since cosmic noon
We conduct the first study of how the relative quenching probability of galaxies depends on environment over the redshift range $0.5 < z < 3$, using data from the UKIDSS Ultra-Deep Survey. By constructing the stellar mass functions for quiescent and
Externí odkaz:
http://arxiv.org/abs/2304.09169
Autor:
Hartke, J., Arnaboldi, M., Gerhard, O., Coccato, L., Merrifield, M., Kuijken, K., Pulsoni, C., Agnello, A., Bhattacharya, S., Spiniello, C., Cortesi, A., Freeman, K. C., Napolitano, N. R., Romanowsky, A. J.
Publikováno v:
A&A 663, A12 (2022)
M105 is an early-type galaxy in the nearby Leo I group, the closest galaxy group to contain all galaxy types and therefore an excellent environment to explore the low-mass end of intra-group light (IGL) assembly. We present a new extended kinematic s
Externí odkaz:
http://arxiv.org/abs/2201.08710
In order to study the ram-pressure interaction between radio galaxies and the intracluster medium, we analyse a sample of 208 highly-bent narrow-angle tail radio sources (NATs) in clusters, detected by the LOFAR Two-metre Sky Survey. For NATs within
Externí odkaz:
http://arxiv.org/abs/2107.00449
Information on the structure around active galactic nuclei (AGN) has long been derived from measuring lags in their varying light output at different wavelengths. In principle, infrared data would reach to larger radii, potentially even probing repro
Externí odkaz:
http://arxiv.org/abs/2103.02622