2014A&A...568L...2S


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.21CEST05:54:08

2014A&A...568L...2S - Astronomy and Astrophysics, volume 568, L2-2 (2014/8-1)

Can one determine cosmological parameters from multi-plane strong lens systems ?

SCHNEIDER P.

Abstract (from CDS):

Strong gravitational lensing of sources with different redshifts has been used to determine cosmological distance ratios, which in turn depend on the expansion history. Hence, such systems are viewed as potential tools for constraining cosmological parameters. Here we show that in lens systems with two distinct source redshifts, of which the nearest one contributes to the light deflection toward the more distant one, there exists an invariance transformation that leaves all strong-lensing observables unchanged (except for the product of time delay and Hubble constant), generalizing the well-known mass-sheet transformation in single-plane lens systems. The transformation preserves the relative location of mass and light. All time delays (from sources on both planes) scale with the same factor - time-delay ratios are therefore invariant under the mass-sheet transformation. Changing cosmological parameters, and thus distance ratios, is essentially equivalent to such a mass-sheet transformation. As an example, we discuss the double-source plane system SDSSJ0946+1006, which has recently been studied by Collett and Auger, and show that variations of cosmological parameters within reasonable ranges lead to only a weak mass-sheet transformation in both lens planes. Hence, the ability to extract cosmological information from such systems depends heavily on the ability to break the mass-sheet degeneracy.

Abstract Copyright:

Journal keyword(s): gravitational lensing: strong - 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 - 2019
#notes
1 [GTK2008] Lens 1 gLe 09 46 56.681 +10 06 52.80     17.78   17.09 ~ 28 0

    Equat.    Gal    SGal    Ecl

C.D.S. - SIMBAD4 rel 1.7 - 2019.10.21CEST05:54:08

Available data : Basic data  •  Identifiers  •  Plot & images  •  Bibliography  •  Measurements  •  External archives  •  Notes  •  Annotations


Basic data :
[GTK2008] Lens 1 -- Gravitational Lens
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types:
gLe (Ref,[GTK2008]), G (Ref,SLACS)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : coordinates error major axis, minor axis (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) :
09 46 56.681 +10 06 52.80 (Optical) [ ] C 2009yCat.2294....0A
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : coordinates error major axis, minor axis (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) :
09 44 16.264 +10 20 47.55 [ ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : coordinates error major axis, minor axis (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) :
225.240507 +43.420755 [ ]
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
  • value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
    (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
  • [error] : error of the corresponding value displayed before
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the value's origin
Radial velocity / Redshift / cz :
V(km/s) 59303 [57] / z(~) 0.22196 [0.00019] / cz 66541.9 [57.0]
   C 2008yCat.2282....0A
Syntax of morphological type is : mtype quality bibcode
  • mtype : Hubble morphological class (spirals, ellipticals, etc)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the morphological type reference
Morphological type:
E D 2009ApJ...705.1099A
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (7) :
V 17.78 [~] D 2009ApJ...705.1099A
I 17.09 [~] D 2008ApJ...682..964B
u (AB) 20.61 [0.17] C 2008yCat.2282....0A
g (AB) 19.009 [0.016] C 2008yCat.2282....0A
r (AB) 17.658 [0.008] C 2008yCat.2282....0A
i (AB) 17.163 [0.008] C 2008yCat.2282....0A
z (AB) 16.787 [0.021] C 2008yCat.2282....0A
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Hierarchy : number of linked objects
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: 1 : 1 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (3) :
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SDSS J094656.68+100652.8 SLACS SDSS J0946+1006 lens [GTK2008] Lens 1

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References (28 between 1850 and 2019) (Total 28)
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Data at NED - NASA/IPAC Extragalactic Database : [GTK2008] Lens 1

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SDSS J094656.68+100652.8

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2019.10.21-05:54:08

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