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   Articles with "galaxy groups" as a keyword



Weak Lensing Analysis of A115, A2219 and A2261: Detection of Galaxy Groups and Filaments Around Clusters

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recommendations! Published in 2025 at "Publications of the Astronomical Society of the Pacific"

DOI: 10.1088/1538-3873/adcbd5

Abstract: We present a weak lensing and multi-wavelength analysis of three galaxy clusters: A115, A2219, and A2261. Weak lensing is performed using shape measurements made in short 60 s exposure images obtained using WIYN-ODI. Forced measurement… read more here.

Keywords: a2219 a2261; analysis; weak lensing; galaxy groups ... See more keywords
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Identifying galaxy groups at high redshift from incomplete spectroscopic data – I. The group finder and application to zCOSMOS

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recommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/staa2816

Abstract: Identifying galaxy groups from redshift surveys of galaxies plays an important role in connecting galaxies with the underlying dark matter distribution. Current and future high-$z$ spectroscopic surveys, usually incomplete in redshift sampling, present both opportunities… read more here.

Keywords: identifying galaxy; group finder; group; galaxy groups ... See more keywords
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Galaxy and mass assembly (GAMA): the clustering of galaxy groups

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recommendations! Published in 2021 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stab1697

Abstract: We explore the clustering of galaxy groups in the Galaxy and Mass Assembly (GAMA) survey to investigate the dependence of group bias and profile on separation scale and group mass. Due to the inherent uncertainty… read more here.

Keywords: clustering galaxy; galaxy mass; mass; group ... See more keywords

Examining baryonic Faber-Jackson relation in galaxy groups

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recommendations! Published in 2024 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stae343

Abstract: We investigate the Baryonic Faber-Jackson Relation (BFJR), examining the correlation between baryonic mass and velocity dispersion in galaxy groups and clusters. Originally analysed in elliptical galaxies, the BFJR is derivable from the empirical Radial Acceleration… read more here.

Keywords: galaxy groups; velocity dispersion; relation; galaxy ... See more keywords

Implications of feedback solutions to the S8 tension for the baryon fractions of galaxy groups and clusters

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recommendations! Published in 2024 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/staf1055

Abstract: Recent large-scale structure (LSS) surveys have revealed a persistent tension in the value of $S_8=\sigma _8\sqrt{(\Omega _{\mathrm{m}}/0.3)}$ compared to predictions from the standard cosmological model. Although some studies indicate that baryonic effects are too small… read more here.

Keywords: baryon fractions; baryonic effects; baryon; galaxy groups ... See more keywords
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Segregation effects in DEEP2 galaxy groups

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recommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stw2321

Abstract: We investigate segregation phenomena in galaxy groups in the range of $0.2 0.6$) redshift groups. Assuming that the color index ${(U-B)_0}$ can be used as a proxy for the galaxy type, we found that the… read more here.

Keywords: sample; segregation effects; high sample; low sample ... See more keywords
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Understanding `galaxy groups' as a unique structure in the universe

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recommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stx1488

Abstract: `Galaxy groups' have hardly been realised as a separate class of objects with specific characteristics in the structural hierarchy. The presumption that the self-similarity of dark matter structures is a valid prescription for the baryonic… read more here.

Keywords: groups unique; galaxy; non thermal; understanding galaxy ... See more keywords

A new approach to finding galaxy groups using Markov Clustering

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recommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society: Letters"

DOI: 10.1093/mnrasl/slz045

Abstract: We present a proof of concept of a new galaxy group finder method, Markov graph CLustering (MCL) that naturally handles probabilistic linking criteria. We introduce a new figure of merit, the variation of information (VI)… read more here.

Keywords: mcl; group; approach finding; new approach ... See more keywords