Extending the $L_{\mathrm{X}}-T$ relation from clusters to groups-Impact of cool core nature, AGN feedback, and selection effects

Abstract

We aim to investigate the bolometric $L_{\mathrm{X}}-T$ relation for galaxy groups, and study the impact of gas cooling, feedback from supermassive black holes, and selection effects on it. With a sample of 26 galaxy groups we obtained the best fit $L_{\mathrm{X}}-T$ relation for five different cases depending on the ICM core properties and central AGN radio emission, and determined the slopes, normalisations, intrinsic and statistical scatters for both temperature and luminosity. Simulations were undertaken to correct for selection effects (e.g. Malmquist bias) and the bias corrected relations for groups and clusters were compared. The slope of the bias corrected $L_{\mathrm{X}}-T$ relation is marginally steeper but consistent with clusters ($\sim 3$). Groups with a central cooling time less than 1 Gyr (SCC groups) show indications of having the steepest slope and the highest normalisation. For the groups, the bias corrected intrinsic scatter in $L_{\mathrm{X}}$ is larger than the observed scatter for most cases, which is reported here for the first time. Lastly, we see indications that the groups with an extended central radio source have a much steeper slope than those groups which have a CRS with only core emission. Additionally, we also see indications that the more powerful radio AGN are preferentially located in NSCC groups rather than SCC groups.

Accepted for publication in Astronomy and Astrophysics

References in corpus (6)

• Stellar and total baryon mass fractions in groups and clusters since redshift 1
• Scaling Properties of a Complete X-ray Selected Galaxy Group Sample
• Simulations of AGN feedback in galaxy clusters and groups: impact on gas fractions and the Lx-T scaling relation
• The X-Ray Luminosity--Mass Relation for Local Clusters of Galaxies
• Constraining galaxy cluster temperatures and redshifts with eROSITA survey data
• ICM cooling, AGN feedback and BCG properties of galaxy groups-Five properties where groups differ from clusters

Cited by in corpus (10)

• Probing cosmic isotropy with a new X-ray galaxy cluster sample through the $L_{\text{X}}-T$ scaling relation
• Simulating Groups and the IntraGroup Medium: The Surprisingly Complex and Rich Middle Ground Between Clusters and Galaxies
• Scaling Properties of Galaxy Groups
• HICOSMO - Cosmology with a complete sample of galaxy clusters: I. Data analysis, sample selection and luminosity-mass scaling-relation
• The many lives of active galactic nuclei-II: The formation and evolution of radio jets and their impact on galaxy evolution
• Understanding `galaxy groups' as a unique structure in the universe
• The X-ray luminosity-temperature relation of a complete sample of low-mass galaxy clusters
• JWST/NIRSpec and MIRI observations of an expanding, jet-driven bubble of warm H${}_2$ in the radio galaxy 3C 326 N
• Cosmological Simulation of Galaxy Groups and Clusters-I: Global Effect of Feedback from Active Galactic Nuclei
• Turbulence in the intragroup and circumgalactic medium