2020ApJ...896L..45W

Query : 2020ApJ...896L..45W

2020ApJ...896L..45W - Astrophys. J., 896, L45-L45 (2020/June-3)

Radio power from a direct-collapse black hole in CR7.

WHALEN D.J., MEZCUA M., MEIKSIN A., HARTWIG T. and LATIF M.A.

Abstract (from CDS):

The leading contenders for the seeds of the first quasars are direct-collapse black holes (DCBHs) formed during catastrophic baryon collapse in atomically cooled halos at z ∼ 20. The discovery of the Lyα emitter CR7 at z = 6.6 was initially held to be the first detection of a DCBH, although this interpretation has since been challenged on the grounds of Spitzer IRAC and Very Large Telescope X-Shooter data. Here we determine if radio flux from a DCBH in CR7 could be detected and discriminated from competing sources of radio emission in the halo such as young supernovae and H II regions. We find that a DCBH would emit a flux of 10-200 nJy at 1.0 GHz, far greater than the sub-nJy signal expected for young supernovae but on par with continuum emission from star-forming regions. However, radio emission from a DCBH in CR7 could be distinguished from free-free emission from H II regions by its spectral evolution with frequency and could be detected by the Square Kilometre Array in the coming decade.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Supermassive black holes - Intermediate-mass black holes - Primordial galaxies - High-redshift galaxies - Population III stars - Quasars - Early universe - Reionization

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 : 2020ApJ...896L..45W

Basic data :
COSMOS2015 338645 -- Emission-line galaxy
Other object types: otypes_help 		EmG (2015ApJ,[MSS2015b],...), G (2014MNRAS), G? ([BDM2012])
ICRS coord. (ep=J2000) : 		10 00 58.01148 +01 48 15.3000 (Optical) [ ] C 2018ApJ...858...77H
FK4 coord. (ep=B1950 eq=1950) : 		09 58 23.14210 +02 02 42.5200 [ ]
Gal coord. (ep=J2000) : 		237.35785109 +41.98705862 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 289607 [~] / z(emission) 6.607 [~] / cz 1980729 [~]
   (Opt) D 2022ApJ...926..230N
Fluxes (6) :
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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Identifiers (7) :
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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)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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