2007MNRAS.376L..34M

Query : 2007MNRAS.376L..34M

2007MNRAS.376L..34M - Mon. Not. R. Astron. Soc., 376, L34-L38 (2007/March-3)

On the size of HII regions around high-redshift quasars.

MASELLI A., GALLERANI S., FERRARA A. and CHOUDHURY T.R.

Abstract (from CDS):

We investigate the possibility of constraining the ionization state of the intergalactic medium (IGM) close to the end of reionization (z ~ 6) by measuring the size of Hii regions in high-z quasar spectra. We perform a combination of multiphase smoothed particle hydrodynamics and three-dimensional radiative transfer simulations to predict reliably the properties of typical high-z quasar Hii regions, embedded in a partly neutral IGM (xHi= 0.1). In this work we assume a fixed configuration for the quasar lifetime and luminosity, i.e. tQ= 107yr and. From the analysis of mock spectra along lines of sight through the simulated QSO environment, we find that the Hii region size derived from quasar spectra is on average 30 per cent smaller than the physical one. Additional maximum likelihood analysis shows that this offset induces an overestimate of the neutral hydrogen fraction, xHi, by a factor of ~3. By applying the same statistical method to a sample of observed QSOs, our study favours a mostly ionized (xHi< 0.06) universe at z = 6.1.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): radiative transfer - methods: numerical - intergalactic medium - cosmology: theory - large-scale structure of Universe

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 SDSS J103027.09+052455.0 QSO 10 30 27.092 +05 24 55.02   26.15 25.44     ~ 303 0

Query : 2007MNRAS.376L..34M

Basic data :
SDSS J103027.09+052455.0 -- Quasar
Other object types: otypes_help 		QSO (2010A&A,QSO,...), X (2XMM,[NGV2020]), Opt (PSO,SDSS), AGN (2021A&A), G (2023A&A), MIR (WISE)
ICRS coord. (ep=J2000) : 		10 30 27.092 +05 24 55.02 (Optical) [ 87 71 90 ] C 2015ApJS..219...12A
FK4 coord. (ep=B1950 eq=1950) : 		10 27 50.842 +05 40 19.49 [ 87 71 90 ]
Gal coord. (ep=J2000) : 		239.455221 +50.051398 [ 87 71 90 ]
Radial velocity / Redshift / cz : 		V(km/s) 288772 [~] / z(~) 6.308 [~] / cz 1891091 [~]
   D 2023Natur.617..261K
Fluxes (10) :
B 26.15 [~] D 2010A&A...518A..10V
V 25.44 [~] D 2010A&A...518A..10V
J (AB) 19.874 [0.0760] C 2020MNRAS.494..789R
H (AB) 19.793 [0.1086] D 2020MNRAS.494..789R
K (AB) 19.492 [0.0830] C 2020MNRAS.494..789R
u (AB) 25.1 [0.9] E 2015ApJS..219...12A
g (AB) 25.93 [0.60] E 2009ApJS..182..543A
r (AB) 27.50 [~] D 2021A&A...656A.117M
i (AB) 22.961 [0.396] E 2009ApJS..182..543A
z (AB) 20.19 [0.04] C 2016ApJS..227...11B
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Identifiers (14) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

QSO B1027+0540 SDSS J103027.10+052455.0 WISE J103027.11+052454.6 [VV2006] J103027.1+052455
KODIAQ J103027+052455 SDSS J103027.09+052455.1 2XMM J103027.1+052455 [VV2010] J103027.1+052455
PSO J157.6129+05.4152 SDSS J103027.09+052455.0 [NGV2020] XID21
QSO J1030+0524 SQUAD DR1 J103027+052455 [VV2003] J103027.1+052455

References (303 between 1850 and 2026) (Total 303)
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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Collections of Measurements Description of Measurements

Velocities : 4   

   

Observing logs
Herschel : 3    XMM : 1   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : SDSS J103027.09+052455.0

Link by name to the catalogue in VizieR :

SDSS J103027.10+052455.0 SDSS J103027.09+052455.1 SDSS J103027.09+052455.0 WISE J103027.11+052454.6

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