We investigate the statistical properties and the origin of the scatter within the spatially resolved surface brightness profiles of the CHEXâ MATE sample, formed by 118 galaxy clusters selected via the SZ effect. These objects have been drawn from the Planck SZ catalogue and cover a wide range of masses, M500â =â [2â â â 15]à - 1014â Mâ , and redshift, zâ =â [0.05,â 0.6]. We derived the surface brightness and emission measure profiles and determined the statistical properties of the full sample and sub-samples according to their morphology, mass, and redshift. We found that there is a critical scale, Râ â ¼â 0.4R500, within which morphologically relaxed and disturbed object profiles diverge. The median of each sub-sample differs by a factor of â ¼10 at 0.05R500. There are no significant differences between mass- and redshift-selected sub-samples once proper scaling is applied. We compare CHEXâ MATE with a sample of 115 clusters drawn from the THE THREE HUNDRED suite of cosmological simulations. We found that simulated emission measure profiles are systematically steeper than those of observations. For the first time, the simulations were used to break down the components causing the scatter between the profiles. We investigated the behaviour of the scatter due to object-by-object variation. We found that the high scatter, approximately 110%, at Râ
CHEX-MATE: Constraining the origin of the scatter in galaxy cluster radial X-ray surface brightness profiles / Bartalucci, I.; Molendi, S.; Rasia, E.; Pratt, G. W.; Arnaud, M.; Rossetti, M.; Gastaldello, F.; Eckert, D.; Balboni, M.; Borgani, S.; Bourdin, H.; Campitiello, M. G.; De Grandi, S.; De Petris, M.; Duffy, R. T.; Ettori, S.; Ferragamo, A.; Gaspari, M.; Gavazzi, R.; Ghizzardi, S.; Iqbal, A.; Kay, S. T.; Lovisari, L.; Mazzotta, P.; Maughan, B. J.; Pointecouteau, E.; Riva, G.; Sereno, M.. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - 674:June 2023(2023), pp. 1-23. [10.1051/0004-6361/202346189]
CHEX-MATE: Constraining the origin of the scatter in galaxy cluster radial X-ray surface brightness profiles
De Petris M.;Ferragamo A.;
2023
Abstract
We investigate the statistical properties and the origin of the scatter within the spatially resolved surface brightness profiles of the CHEXâ MATE sample, formed by 118 galaxy clusters selected via the SZ effect. These objects have been drawn from the Planck SZ catalogue and cover a wide range of masses, M500â =â [2â â â 15]à - 1014â Mâ , and redshift, zâ =â [0.05,â 0.6]. We derived the surface brightness and emission measure profiles and determined the statistical properties of the full sample and sub-samples according to their morphology, mass, and redshift. We found that there is a critical scale, Râ â ¼â 0.4R500, within which morphologically relaxed and disturbed object profiles diverge. The median of each sub-sample differs by a factor of â ¼10 at 0.05R500. There are no significant differences between mass- and redshift-selected sub-samples once proper scaling is applied. We compare CHEXâ MATE with a sample of 115 clusters drawn from the THE THREE HUNDRED suite of cosmological simulations. We found that simulated emission measure profiles are systematically steeper than those of observations. For the first time, the simulations were used to break down the components causing the scatter between the profiles. We investigated the behaviour of the scatter due to object-by-object variation. We found that the high scatter, approximately 110%, at Râ| File | Dimensione | Formato | |
|---|---|---|---|
|
Bartalucci_CHEX-MATE_2023.pdf
accesso aperto
Tipologia:
Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza:
Creative commons
Dimensione
2.98 MB
Formato
Adobe PDF
|
2.98 MB | Adobe PDF |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
