2017MNRAS.469..231A

Query : 2017MNRAS.469..231A

2017MNRAS.469..231A - Mon. Not. R. Astron. Soc., 469, 231-236 (2017/July-3)

Metallicity evolution of direct collapse black hole hosts: CR7 as a case study.

AGARWAL B., JOHNSON J.L., KHOCHFAR S., PELLEGRINI E., RYDBERG C.-E., KLESSEN R.S. and OESCH P.

Abstract (from CDS):

In this study, we focus on the z ∼ 6.6 Lyman α CR7 consisting of clump A, which is host to a potential direct collapse black hole (DCBH), and two metal-enriched star-forming clumps B and C. In contrast to claims that signatures of metals rule out the existence of DCBHs, we show that metal pollution of A from star-forming clumps B and C is inevitable, and that A can form a DCBH well before its metallicity exceeds the critical threshold of 10^–5–10^–6 Z_☉. Assuming that metal mixing happens instantaneously, we derive the metallicity of A based on the star formation history of B and C. We find that treating a final accreting BH of 10⁶-10⁷ M_☉ in A for nebular emission already pushes its H₁₆₀ - [3.6] and [3.6] - [4.5] colours into the 3σ limit of observations. Hence, we show that the presence of metals in DCBH hosts is inevitable, and that it is the coevolution of the Lyman-Werner radiation field and metals originating from neighbouring galaxies that governs DCBH formation in neighbouring initially pristine atomic cooling haloes.

Journal keyword(s): quasars: supermassive black holes - dark ages, reionization, first stars - early Universe - cosmology: theory - cosmology: theory

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	COSMOS2015 338645	EmG	10 00 58.01148	+01 48 15.3000						~	101	0

Query : 2017MNRAS.469..231A

Basic data :

COSMOS2015 338645 -- Emission-line galaxy

EmG (2015ApJ,[MSS2015b],...), G (2014MNRAS), G? ([BDM2012])

10 00 58.01148 +01 48 15.3000 (Optical) [ ] C 2018ApJ...858...77H

09 58 23.14210 +02 02 42.5200 [ ]

237.35785109 +41.98705862 [ ]

V(km/s) 289607 [~] / z(emission) 6.607 [~] / cz 1980729 [~] (Opt) D 2022ApJ...926..230N

J 24.62 [0.10] D 2015ApJ...808..139S

H 25.08 [0.14] D 2015ApJ...808..139S

K 25.15 [0.15] D 2015ApJ...808..139S

r (AB) 30.9 [~] D 2021ApJ...911...78O

i (AB) 26.93 [~] D 2018ApJ...858...77H

z (AB) 25.30 [0.09] C 2022ApJ...926..230N

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`COSMOS2015 338645`	`[BDM2012] 30425`	`[HCS2018] J150.2417+01.8042`	`[NJZ2022] 29`
`HSCS J100058+014815`	`[BDM2012] 28400`	`[MSS2015b] CR7`

References (101 between 1850 and 2026) (Total 101)
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