Very high redshift quasars and the rapid emergence of supermassive black holes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10422076" target="_blank" >RIV/00216208:11320/20:10422076 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=GwoCAxKq7I" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=GwoCAxKq7I</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/staa2276" target="_blank" >10.1093/mnras/staa2276</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Very high redshift quasars and the rapid emergence of supermassive black holes

Popis výsledku v původním jazyce

The observation of quasars at very high redshift such as Poniua&apos;ena is a challenge for models of supermassive black hole (SMBH) formation. This work presents a study of SMBH formation via known physical processes in starburst clusters formed at the onset of the formation of their hosting galaxy. While at the early stages hypermassive starburst clusters reach the luminosities of quasars, once their massive stars die, the ensuing gas accretion from the still forming host galaxy compresses its stellar black hole (BH) component to a compact state overcoming heating from the BH-BH binaries such that the cluster collapses, forming a massive SMBH-seed within about a hundred Myr. Within this scenario, the SMBH-spheroid correlation emerges near to exactly. The highest redshift quasars may thus be hypermassive starburst clusters or young ultracompact dwarf galaxies (UCDs), being the precursors of the SMBHs that form therein within about 200 Myr of the first stars. For spheroid masses less than or similar to 10(9.6) M-circle dot, an SMBH cannot form and instead only the accumulated nuclear cluster remains. The number evolution of the quasar phases with redshift is calculated and the possible problem of missing quasars at very high redshift is raised. SMBH-bearing UCDs and the formation of spheroids are discussed critically in view of the high-redshift observations. A possible tension is found between the high star formation rates (SFRs) implied by downsizing and the observed SFRs, which may be alleviated within the IGIMF theory and if the downsizing times are somewhat longer.

Název v anglickém jazyce

Very high redshift quasars and the rapid emergence of supermassive black holes

Popis výsledku anglicky

The observation of quasars at very high redshift such as Poniua&apos;ena is a challenge for models of supermassive black hole (SMBH) formation. This work presents a study of SMBH formation via known physical processes in starburst clusters formed at the onset of the formation of their hosting galaxy. While at the early stages hypermassive starburst clusters reach the luminosities of quasars, once their massive stars die, the ensuing gas accretion from the still forming host galaxy compresses its stellar black hole (BH) component to a compact state overcoming heating from the BH-BH binaries such that the cluster collapses, forming a massive SMBH-seed within about a hundred Myr. Within this scenario, the SMBH-spheroid correlation emerges near to exactly. The highest redshift quasars may thus be hypermassive starburst clusters or young ultracompact dwarf galaxies (UCDs), being the precursors of the SMBHs that form therein within about 200 Myr of the first stars. For spheroid masses less than or similar to 10(9.6) M-circle dot, an SMBH cannot form and instead only the accumulated nuclear cluster remains. The number evolution of the quasar phases with redshift is calculated and the possible problem of missing quasars at very high redshift is raised. SMBH-bearing UCDs and the formation of spheroids are discussed critically in view of the high-redshift observations. A possible tension is found between the high star formation rates (SFRs) implied by downsizing and the observed SFRs, which may be alleviated within the IGIMF theory and if the downsizing times are somewhat longer.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA20-21855S" target="_blank" >GA20-21855S: Dynamika hustých hvězdokup s primordiálními dvojhvězdami a černými veledírami</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

—

Svazek periodika

498

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

32

Strana od-do

5652-5683

Kód UT WoS článku

000587755500078

EID výsledku v databázi Scopus

2-s2.0-85096743197