2004AJ....127..656Z

Query : 2004AJ....127..656Z

2004AJ....127..656Z - Astron. J., 127, 656-659 (2004/February-0)

Detection of intergalactic He II absorption at redshift 3.5.

ZHENG W., CHIU K., ANDERSON S.F., SCHNEIDER D.P., HOGAN C.J., YORK D.G., BURLES S. and BRINKMANN J.

Abstract (from CDS):

The large number of quasars found in the Sloan Digital Sky Survey has allowed searches for elusive, clear lines of sight toward He II Lyα absorption, a sensitive probe of the intergalactic medium. The few known systems indicate that He II reionization occurs at z>3. We report the detection of a He II Lyα absorption edge in a quasar spectrum at z=3.50, the most distant such feature found to date. The candidate quasar was selected from a z∼3 sample in the Sloan Digital Sky Survey spectroscopic quasar survey and confirmed as part of an HST Space Telescope Imaging Spectrograph SNAP survey. We discuss the general characteristics of the absorption feature, as well as the probability for the discovery of additional such objects.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Dark Matter - Galaxies: Intergalactic Medium - quasars: individual (SDSS J2346-0016) - Surveys - ultraviolet: general

Nomenclature: [ZCA2004] QSO J2346-0016 abs N.NNNN N=1.

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 J2346-0016 QSO 23 46 25.6709113344 -00 16 00.427438668   19.44 18.73     ~ 63 0

Query : 2004AJ....127..656Z

Basic data :
QSO J2346-0016 -- Quasar
Other object types: otypes_help 		QSO (2008ApJ,QSO,...), Opt (PSO,SDSS), * (Gaia), NIR (2MASS), MIR (WISEA)
ICRS coord. (ep=J2000) : 		23 46 25.6709113344 -00 16 00.427438668 (Optical) [ 0.1054 0.0881 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		23 43 51.8758591538 -00 32 40.603478150 [ 0.1054 0.0881 90 ]
Gal coord. (ep=J2000) : 		090.0923822870717 -58.9298307952422 [ 0.1054 0.0881 90 ]
Proper motions mas/yr : 		-0.169 -0.045 [0.129 0.104 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 271559 [39] / z(spectroscopic) 3.49850 [0.00013] / cz 1048823.9 [39.0]
   (Opt) C 2012ApJS..203...21A
Fluxes (11) :
B 19.44 [~] D 2010A&A...518A..10V
V 18.73 [~] D 2010A&A...518A..10V
G 17.843140 [0.003146] C 2020yCat.1350....0G
J 16.873 [0.159] C 2010AJ....139.2360S
H 16.133 [0.181] C 2010AJ....139.2360S
K 15.302 [0.162] C 2010AJ....139.2360S
u (AB) 21.2401 [0.0709] C 2020ApJS..250....8L
g (AB) 18.6893 [0.0174] C 2020ApJS..250....8L
r (AB) 17.9305 [0.0177] C 2020ApJS..250....8L
i (AB) 17.7817 [0.0274] C 2020ApJS..250....8L
z (AB) 17.6020 [0.0183] C 2020ApJS..250....8L
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Identifiers (14) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

QSO J2346-0016 SDSS J234625.67-001600.4 [SSO2007] 356.606970-00.266799 Gaia DR2 2642642838349317504
2MASS J23462566-0016003 SDSS J234625.66-001600.4 [VV2003] J234625.7-001600 Gaia DR3 2642642838349317504
PSO J356.6069-00.2667 TIC 398618496 [VV2006] J234625.7-001600
QSO B2343-0032 WISEA J234625.67-001600.4 [VV2010] J234625.7-001600

References (63 between 1850 and 2026) (Total 63)
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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Velocities : 16    PM : 2   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : QSO J2346-0016

Link by name to the catalogue in VizieR :

2MASS J23462566-0016003 SDSS J234625.67-001600.4 SDSS J234625.66-001600.4 WISEA J234625.67-001600.4 Gaia DR2 2642642838349317504
Gaia DR3 2642642838349317504

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