2004A&A...415L...7Q

Query : 2004A&A...415L...7Q

2004A&A...415L...7Q - Astronomy and Astrophysics, volume 415L7-11 (2004/2-4)

Probing the variability of the fine-structure constant with the VLT/UVES.

QUAST R., REIMERS D. and LEVSHAKOV S.A.

Abstract (from CDS):

We assess the cosmological variability of the fine-structure constant α from the analysis of an ensemble of FeII λ1608, λ2344, λ2374, λ2383, λ2587, and λ2600 absorption lines at the redshift z=1.15 toward the QSO HE 0515-4414 by means of the standard many-multiplet (MM) technique and its revision based on linear regression (RMM). This is the first time the MM technique is applied to exceptional high-resolution and high signal-to-noise QSO spectra recorded with the UV-Visual Echelle Spectrograph (UVES) at the ESO Very Large Telescope (VLT). Our analysis results in <Δα/α>_MM=(0.1±1.7)x10^–6 and <Δα/α>_RMM=(-0.4 ±1.9±2.7_sys)x10^–6, which are the most stringent bounds hitherto infered from an individual QSO absorption system. Our results support the null hypothesis <Δα/α≥0 at a significance level of 91 percent, whereas the support for the result <Δα/α≥-5.7x10^–6 presented in former MM studies is 12 percent.

Abstract Copyright: ∼

Journal keyword(s): cosmology: observations - quasars: absorption lines - quasars: individual: HE 0515-4414

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	HE 0515-4414	QSO	05 17 07.6238702856	-44 10 55.579731312	14.74	15.49	15.16			~	129	0

Query : 2004A&A...415L...7Q

Basic data :

HE 0515-4414 -- Quasar

QSO (2010A&A,QSO,...), AGN (2013MNRAS), * (Gaia), NIR (2MASS)

05 17 07.6238702856 -44 10 55.579731312 (Optical) [ 0.0156 0.0175 90 ] A 2020yCat.1350....0G

05 15 37.7160917602 -44 14 05.325538227 [ 0.0156 0.0175 90 ]

249.6075256868163 -34.9655203976558 [ 0.0156 0.0175 90 ]

0.002 -0.038 [0.019 0.024 90] A 2020yCat.1350....0G

V(km/s) 228075 [~] / z(~) 1.713 [~] / cz 513544 [~] D 2003A&A...412..707R

U 14.74 [~] D 2013MNRAS.431..240O

B 15.49 [~] D 2013MNRAS.431..240O

V 15.16 [~] D 2013MNRAS.431..240O

G 14.883336 [0.002894] C 2020yCat.1350....0G

J 13.578 [0.027] C 2003yCat.2246....0C

H 13.031 [0.023] C 2003yCat.2246....0C

K 12.620 [0.024] C 2003yCat.2246....0C

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`QSO B0515-4414`	`QSO J0517-4410`	`[VV2003] J051707.6-441056`	`Gaia DR3 4800195161003160960`
`EC 05156-4414`	`SQUAD DR1 J051707-441055`	`[VV2006] J051707.6-441056`
`HE 0515-4414`	`TIC 220038023`	`[VV2010] J051707.6-441056`
`2MASS J05170762-4410555`	`[VV2000] J051707.6-441056`	`Gaia DR2 4800195161003160960`

References (129 between 1850 and 2026) (Total 129)
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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2MASS J05170762-4410555 Gaia DR2 4800195161003160960 Gaia DR3 4800195161003160960

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