2009A&A...498...49C


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET04:34:41

2009A&A...498...49C - Astronomy and Astrophysics, volume 498, 49-60 (2009/4-4)

Parity dependence in strong lens systems as a probe of dark matter substructure.

CHEN J.

Abstract (from CDS):

The amount of mass in small, dark matter clumps within galaxies (substructure) is an important test of cold dark matter. One approach to measuring the substructure mass fraction is to analyze the fluxes of images that have been strongly lensed by a galaxy. Flux ratios between images that are anomalous with respect to smooth (no substructure) models have previously suggested that there is a greater amount of substructure than found in dark matter simulations. One measure of anomalous flux ratios is parity dependence - that the fluxes of different images of a source are perturbed differently. In this paper, we discuss parity dependence as a probe of dark matter substructure. We find that reproducing the observed parity dependence requires a significant alignment between concentrated dark matter clumps and images. The results may imply a greater fraction of mass in substructures than suggested by some dark matter simulations and that the observed parity dependence is unlikely to be reproduced by luminous satellites of lens galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: halos - gravitational lensing - cosmology: dark matter

CDS comments: B2045+503 is a probable misprint for CLASS B2045+265.

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 4C 05.19 QSO 04 14 37.7673624 +05 34 42.328449   24.100 23.800 21.270   ~ 335 2
2 QSO B0712+472 QSO 07 16 03.65 +47 08 50.6     23.0     ~ 105 1
3 QSO B1115+080A QSO 11 18 16.951 +07 45 58.23   16.61 16.44     ~ 636 2
4 NVSS J113000+381203 Rad 11 30 00.110 +38 12 03.23           ~ 31 0
5 QSO B1359+154 QSO 14 01 35.588 +15 13 24.15     21.90     ~ 69 1
6 QSO B1422+2309 BLL 14 24 38.09400 +22 56 00.5900   16.77 15.84 14.79   ~ 422 1
7 [PBW92] 1422+231 gLS 14 24 38.09400 +22 56 00.5900   16.77 15.84 14.79   ~ 355 0
8 NVSS J160914+653229 rG 16 09 13.96 +65 32 28.8     19.4     ~ 193 1
9 CLASS B1933+503 Rad 19 34 31.02 +50 25 23.5           ~ 82 1
10 [VV2000] J204719.3+264340 QSO 20 47 20.3 +26 44 03     20.60     ~ 107 2
11 [MKF2007] G2 G 20 47 20.31951 +26 44 02.0486           ~ 6 1
12 [FBC99] 2045+265 E G 20 47 20.36859 +26 44 01.8840           ~ 21 1

    Equat.    Gal    SGal    Ecl

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2021.02.26-04:34:41

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