2003MNRAS.345..243C

Query : 2003MNRAS.345..243C

2003MNRAS.345..243C - Mon. Not. R. Astron. Soc., 345, 243-252 (2003/October-2)

The deuterium abundance in the z 0.7 absorber towards QSO PG1718+4807.

CRIGHTON N.H.M., WEBB J.K., CARSWELL R.F. and LANZETTA K.M.

Abstract (from CDS):

We report on a further analysis of the ratio of deuterium to hydrogen (D/H) using Hubble Space Telescope (HST) spectra of the z 0.701 Lyman limit system towards the quasi-stellar object (QSO) PG1718+481. Initial analyses of this absorber found it gave a high D/H value, 1.8-3.1x10^–4, inconsistent with several higher redshift measurements. It is thus important to critically examine this measurement. By analysing the velocity widths of the DI, HI and metal lines present in this system, Kirkman et al. report that the additional absorption in the blue wing of the Lyα line cannot be Di, with a confidence level of 98 per cent. Here we present a more detailed analysis, taking into account possible wavelength shifts between the three sets of HST spectra used in the analysis. We find that the constraints on this system are not as strong as those claimed by Kirkman et al. The discrepancy between the parameters of the blue wing absorption and the parameters expected for Di is marginally worse than 1σ.

Tytler et al. commented on the first analysis of Webb et al., reporting the presence of a contaminating lower redshift Lyman limit system, with log[N (HI)] 16.7 at z 0.602, which biases the N (HI) estimate for the main system. Here we show that this absorber actually has log[N (HI)] < 14.6 and does not impact on the estimate of N (HI) in the system of interest at z 0.701.

The purpose of the present paper is to highlight important aspects of the analysis which were not explored in previous studies, and hence to help refine the methods used in future analyses of D/H in quasar spectra.

Abstract Copyright: 2003 RAS

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

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 J1719+4804	Bla	17 19 38.2496454120	+48 04 12.247659408		15.33	14.60	14.25		~	186	1

Query : 2003MNRAS.345..243C

Basic data :

QSO J1719+4804 -- Blazar

Rad (2020A&A,BWE,...), QSO (2005ApJ,QSO,...), Bla (2009A&A,[MGL2009],...), X (2009A&A,1AXG,...), AGN (2016AJ,CGRaBS), UV (PG,UVQS), Bz? ([SRM2005]), * (Gaia), gam (INTREF), NIR (2MASS), MIR (WISE), IR (2MASSI), Opt (LAMOST)

17 19 38.2496454120 +48 04 12.247659408 (Optical) [ 0.0148 0.0168 90 ] A 2020yCat.1350....0G

17 18 17.7238534743 +48 07 10.641273786 [ 0.0148 0.0168 90 ]

074.3749840909477 +34.8290187116085 [ 0.0148 0.0168 90 ]

-0.010 0.025 [0.019 0.022 90] A 2020yCat.1350....0G

V(km/s) 187487 [~] / z(emission) 1.083 [~] / cz 324675 [~] (Opt) C 2017AJ....154..114O

B 15.33 [~] E ~

V 14.60 [~] E ~

R 14.25 [~] D 2008ApJS..175...97H

G 14.742741 [0.002889] C 2020yCat.1350....0G

J 13.460 [0.027] C 2003yCat.2246....0C

H 13.046 [0.024] C 2003yCat.2246....0C

K 12.578 [0.030] C 2003yCat.2246....0C

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`QSO J1719+4804`	`IVS B1718+481`	`RX J1719.6+4804`	`[VV2000] J171938.4+480413`
`1AXG J171940+4803`	`KODIAQ J171938+480412`	`1RXS J171937.9+480409`	`[VV2003] J171938.3+480413`
`BWE 1718+4806`	`LAMOST J171938.29+480412.5`	`TIC 188667251`	`[VV2006] J171938.3+480413`
`CGRaBS J1719+4804`	`LAMOST J171938.28+480412.5`	`UVQS J171938.24+480412.2`	`[VV2010] J171938.3+480413`
`CLASS J171938.2561+480412.259`	`2MASS J17193824+4804124`	`VCS5 J1719+4804`	`[VV96] J171938.4+480413`
`CRATES J171937+480404`	`2MASSI J1719382+480412`	`VIPS J17196+4804`	`[VV98] J171938.4+480413`
`EF B1718+4807`	`MITG J171935+4804`	`WISE J171938.25+480412.3`	`[ZEH2003] RX J1719.6+4804 1`
`FIRST J171938.2+480412`	`NVSS J171938+480412`	`WISE J171938.24+480412.2`	`Gaia DR3 1365900793853830144`
`GB6 B1718+4807`	`PG 1718+481`	`[BDW2002] q1718+4807`	`Gaia DR1 1365900789558355712`
`87GB 171816.3+480654`	`QSO B1718+481`	`[HB93] 1718+481`	`Gaia DR2 1365900793853830144`
`ICRF J171938.2+480412`	`QSO B1718+4807`	`[MGL2009] BZQ J1719+4804`
`IERS B1718+481`	`RGB J1719+480`	`[MML2015] 5BZQ J1719+4804`
`INTREF 771`	`RGB J1719.6+4804`	`[SRM2005] J171938.25+480412.2`

References (186 between 1850 and 2026) (Total 186)
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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Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : QSO J1719+4804

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`BWE 1718+4806`	`FIRST J171938.2+480412`	`IERS B1718+481`	`2MASS J17193824+4804124`	`2MASSI J1719382+480412`
`MITG J171935+4804`	`NVSS J171938+480412`	`PG 1718+481`	`1RXS J171937.9+480409`	`WISE J171938.25+480412.3`
`WISE J171938.24+480412.2`	`Gaia DR3 1365900793853830144`	`Gaia DR1 1365900789558355712`	`Gaia DR2 1365900793853830144`

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