The El Gordo Galaxy Cluster Challenges ?CDM for Any Plausible Collision Velocity
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476061" target="_blank" >RIV/00216208:11320/23:10476061 - isvavai.cz</a>
Výsledek na webu
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=.bRCivCume" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=.bRCivCume</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/ace62a" target="_blank" >10.3847/1538-4357/ace62a</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
The El Gordo Galaxy Cluster Challenges ?CDM for Any Plausible Collision Velocity
Popis výsledku v původním jazyce
El Gordo (ACT-CL J0102-4915) is an extraordinarily large and bright galaxy cluster collision. In a previous study, we found that El Gordo is in 6.2 sigma tension with the. cold dark matter (.CDM) standard model when assuming the nominal mass and infall velocity values from the hydrodynamical simulations of Zhang et al. (M-200 = 3.2 x 10(15)M circle dot. and Vinfall = 2500 km s(-1), respectively). The recent weak-lensing study of Kim et al. showed that the mass of El Gordo is actually 2.13+(+0.25)(-0.23) x 10(15)M circle dot. Here we explore the level of tension between El Gordo and.CDM for the new mass estimate, assuming several Vinfall values. We find that in order to reduce the tension below the 5s level, the El Gordo subclusters should have Vinfall < 2300 km s(-1) (V-infall < 1800 km s(-1) when considering the combined tension with the Bullet Cluster). To the best of our knowledge, the El Gordo hydrodynamical simulations conducted so far require V-infall. 2500 km s(-1) to simultaneously reproduce its morphology and its high X-ray luminosity and temperature. We therefore conclude that El Gordo still poses a significant challenge to.CDM cosmology. Whether the properties of El Gordo can be reconciled with a lower Vinfall should be tested with new hydrodynamical simulations that explore different configurations of the interaction.
Název v anglickém jazyce
The El Gordo Galaxy Cluster Challenges ?CDM for Any Plausible Collision Velocity
Popis výsledku anglicky
El Gordo (ACT-CL J0102-4915) is an extraordinarily large and bright galaxy cluster collision. In a previous study, we found that El Gordo is in 6.2 sigma tension with the. cold dark matter (.CDM) standard model when assuming the nominal mass and infall velocity values from the hydrodynamical simulations of Zhang et al. (M-200 = 3.2 x 10(15)M circle dot. and Vinfall = 2500 km s(-1), respectively). The recent weak-lensing study of Kim et al. showed that the mass of El Gordo is actually 2.13+(+0.25)(-0.23) x 10(15)M circle dot. Here we explore the level of tension between El Gordo and.CDM for the new mass estimate, assuming several Vinfall values. We find that in order to reduce the tension below the 5s level, the El Gordo subclusters should have Vinfall < 2300 km s(-1) (V-infall < 1800 km s(-1) when considering the combined tension with the Bullet Cluster). To the best of our knowledge, the El Gordo hydrodynamical simulations conducted so far require V-infall. 2500 km s(-1) to simultaneously reproduce its morphology and its high X-ray luminosity and temperature. We therefore conclude that El Gordo still poses a significant challenge to.CDM cosmology. Whether the properties of El Gordo can be reconciled with a lower Vinfall should be tested with new hydrodynamical simulations that explore different configurations of the interaction.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10308 - Astronomy (including astrophysics,space science)
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2023
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Astrophysical Journal
ISSN
0004-637X
e-ISSN
1538-4357
Svazek periodika
954
Číslo periodika v rámci svazku
2
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
6
Strana od-do
162
Kód UT WoS článku
001062490900001
EID výsledku v databázi Scopus
2-s2.0-85171138456