2017MNRAS.470.1919B

Query : 2017MNRAS.470.1919B

2017MNRAS.470.1919B - Mon. Not. R. Astron. Soc., 470, 1919-1934 (2017/September-2)

A deep search for metals near redshift 7: the line of sight towards ULAS J1120+0641.

BOSMAN S.E.I., BECKER G.D., HAEHNELT M.G., HEWETT P.C., McMAHON R.G., MORTLOCK D.J., SIMPSON C. and VENEMANS B.P.

Abstract (from CDS):

We present a search for metal absorption line systems at the highest redshifts to date using a deep (30 h) Very Large Telescope/X-Shooter spectrum of the z = 7.084 quasi-stellar object (QSO) ULAS J1120+0641. We detect seven intervening systems at z > 5.5, with the highest redshift system being a C IV absorber at z = 6.51. We find tentative evidence that the mass density of C IV remains flat or declines with redshift at z < 6, while the number density of C II systems remains relatively flat over 5 < z < 7. These trends are broadly consistent with models of chemical enrichment by star formation-driven winds that include a softening of the ultraviolet background towards higher redshifts. We find a larger number of weak (W_rest < 0.3 Å) Mg II systems over 5.9 < z < 7.0 than predicted by a power-law fit to the number density of stronger systems. This is consistent with trends in the number density of weak Mg II systems at z <= 2.5, and suggests that the mechanisms that create these absorbers are already in place at z ∼ 7. Finally, we investigate the associated narrow Si IV, C IV and N V absorbers located near the QSO redshift, and find that at least one component shows evidence of partial covering of the continuum source.

Journal keyword(s): intergalactic medium - quasars: absorption lines - quasars: individual: ULAS J1120+0641 - dark ages, reionization, first stars - dark ages, reionization, first stars

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	QSO J1120+0641	QSO	11 20 01.463	+06 41 23.79						~	262	0

Query : 2017MNRAS.470.1919B

Basic data :

QSO J1120+0641 -- Quasar

QSO (2011Natur,QSO,...), MIR (WISE)

11 20 01.463 +06 41 23.79 (mm) [ 20 30 90 ] C 2020ApJ...904..130V

11 17 26.280 +06 57 49.77 [ 20 30 90 ]

252.047510 +60.188058 [ 20 30 90 ]

V(km/s) 290758 [150] / z(spectroscopic) 7.0851 [0.0005] / cz 2124060 [150] (NIR) C 2021ApJ...923..262Y

J (AB) 20.36 [0.05] C 2016ApJS..227...11B

H (AB) 20.156 [0.0636] C 2020MNRAS.494..789R

K (AB) 19.613 [0.0526] C 2020MNRAS.494..789R

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QSO J1120+0641 ULAS J112001.48+064124.3 WISE J112001.47+064124.2 [YWF2021] J112001.48+064124.3

References (262 between 1850 and 2026) (Total 262)
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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Data at NED - NASA/IPAC Extragalactic Database : QSO J1120+0641

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ULAS J112001.48+064124.3 WISE J112001.47+064124.2

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