2004MNRAS.355.1042C

Query : 2004MNRAS.355.1042C

2004MNRAS.355.1042C - Mon. Not. R. Astron. Soc., 355, 1042-1052 (2004/December-3)

Deuterium/hydrogen in a new Lyman limit absorption system at z= 3.256 towards PKS1937-1009.

CRIGHTON N.H.M., WEBB J.K., ORTIZ-GIL A. and FERNANDEZ-SOTO A.

Abstract (from CDS):

We have identified a new Lyman limit absorption system towards PKS1937-1009, with logN(Hi) = 18.25±0.02 at z= 3.256 that is suitable for measuring deuterium/hydrogen (D/H). We find a 68.3 per cent confidence range for D/H of 1.6+0.25–0.30x 10–5 and a 95.4 per cent range of 1.6+0.5–0.4x 10–5. The metallicity of the cloud where D/H was measured is low, [Si/H]=-2.0 ± 0.5. At these metallicities we expect that D/H will be close to the primordial value. Our D/H is lower than the D/H value predicted using the Ωb calculated from the cosmic background radiation measured by the Wilkinson Microwave Anisotropy Probe, 2.60+0.19–0.17x 10–5. Our result also exacerbates the scatter in D/H values around the mean primordial D/H.

Abstract Copyright: 2004 RAS

Journal keyword(s): nuclear reactions, nucleosynthesis, abundances - quasars: absorption lines - cosmological parameters

Nomenclature: Text: [CWO2004] QSO J1939-1002 abs N.NNN N=1.

CDS comments: PKS1937-1009 = PKS 1937-101 and PG 1718-4801 = PG 1718-481 in SIMBAD.

Simbad objects: 11

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Number of rows : 11
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 6C 001403+811827 BLL 00 17 08.47489694 +81 35 08.1365094   17.60 16.52 15.95   ~ 405 1
2 QSO B0105+1619 QSO 01 08 06.4234637880 +16 35 49.968976200   16.9       ~ 63 0
3 QSO B0130-403 QSO 01 33 01.9294067496 -40 06 27.997379496   17.68 17.02     ~ 89 0
4 QSO B0347-383 QSO 03 49 43.6603590912 -38 10 30.825444900     17.3     ~ 196 0
5 QSO J0422-3844 BLL 04 22 14.7829521792 -38 44 52.826059032   17.70 16.92 16.3   ~ 203 2
6 CSO 38 QSO 10 11 55.5947671920 +29 41 41.595330804   16.28 16.05     ~ 117 0
7 QSO B1202-074 QSO 12 05 23.1360370080 -07 42 32.759842896     17.5     ~ 389 5
8 QSO B1243+3047 QSO 12 46 10.800 +30 31 17.00     17.00     ~ 44 0
9 QSO J1719+4804 Bla 17 19 38.2496454120 +48 04 12.247659408   15.33 14.60 14.25   ~ 186 1
10 QSO B1937-1009 BLL 19 39 57.2566747152 -10 02 41.522299692   18.800 19.0 17.188   ~ 207 1
11 LBQS 2206-1958A QSO 22 08 52.0729138920 -19 43 59.866776948   17.49 17.33     ~ 223 0

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