1998A&A...334L..33J


Query : 1998A&A...334L..33J

1998A&A...334L..33J - Astronomy and Astrophysics, volume 334, L33-36 (1998/6-2)

Lensing galaxies: light or dark?

JACKSON N., HELBIG P., BROWNE I., FASSNACHT C.D., KOOPMANS L., MARLOW D. and WILKINSON P.N.

Abstract (from CDS):

In a recent paper, Hawkins (1997A&A...328L..25H) argues on the basis of statistical studies of double-image gravitational lenses and lens candidates that a large population of dark lenses exists and that these outnumber galaxies with more normal mass-to-light ratios by a factor of 3:1. If correct, this is a very important result for many areas of astronomy including galaxy formation and cosmology. In this paper we discuss our new radio-selected gravitational lens sample, JVAS/CLASS, in order to test and constrain this proposition. We have obtained ground-based and HST images of all multiple-image lens systems in our sample and in 12 cases out of 12 we find the lensing galaxies in the optical and/or near infrared. Our success in finding lensing galaxies creates problems for the dark lens hypothesis. If it is to survive, ad hoc modifications seem to be necessary: only very massive galaxies (M>9x1011M) can be dark, and the cutoff in mass must be sharp. Our finding of lens galaxies in all the JVAS/CLASS systems is complementary evidence which supports the conclusion of Kochanek et al. (1998, astro-ph/9710165) that many of the wide-separation optically-selected pairs are physically distinct quasars rather than gravitational lens systems.

Abstract Copyright:

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

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 QSO B0218+357 QSO 02 21 05.4920852208 +35 56 13.848581904   20.0 20.0 19.60   ~ 528 3
2 4C 05.19 QSO 04 14 37.7673624 +05 34 42.328449   24.100 23.800 21.270   ~ 344 2
3 QSO B0712+472 QSO 07 16 03.65 +47 08 50.6     23.0     ~ 108 1
4 [FC98] B0712+472 G G 07 16 03.65 +47 08 50.6           ~ 19 1
5 8C 0958+561 QSO 10 01 20.6918953728 +55 53 55.593949272   17.16 16.95     ~ 714 3
6 [LFK2000] 1030+074 G G 10 33 +07.1           ~ 17 1
7 QSO B1030+074 QSO 10 33 34.0241922480 +07 11 26.156490324     20.34 20.22   ~ 102 1
8 NVSS J113000+381203 Rad 11 30 00.110 +38 12 03.23           ~ 31 0
9 QSO B1128+385 QSO 11 30 53.2825598016 +38 15 18.551693556   19.11 18.80 19.42   ~ 185 1
10 [PBW92] 1422+231 E G 14 24 38.09 +22 56 00.7           ~ 41 1
11 QSO B1422+2309 BLL 14 24 38.09400 +22 56 00.5900   16.77 15.84 14.79   ~ 429 1
12 [PBW92] 1422+231 gLS 14 24 38.09400 +22 56 00.5900   16.77 15.84 14.79   ~ 356 0
13 QSO B1600+4344 QSO 16 01 40.4818 +43 16 47.394   22.12 21.92     ~ 180 1
14 [JH97] B1600+434 Lens G 16 02 +43.3     22.5     ~ 23 1
15 [MFD95] Lensing G G 16 09 13.96 +65 32 28.8           ~ 23 0
16 NVSS J160914+653229 rG 16 09 13.96 +65 32 28.8     19.4     ~ 198 1
17 CLASS B1933+507 LeI 19 34 +50.8           ~ 6 0
18 BWE 1938+6641 gLe 19 38 25.32029 +66 48 53.4199           ~ 96 2
19 QSO B2016+112 QSO 20 19 18.2 +11 27 14     22.5     ~ 193 1
20 [VV2000] J204719.3+264340 QSO 20 47 20.3 +26 44 03     20.60     ~ 109 2
21 [FBC99] 2045+265 E G 20 47 20.36859 +26 44 01.8840           ~ 21 1
22 PKS J2116+0225 Rad 21 16 50.7449472 +02 25 46.270365           ~ 56 2
23 [ABW2001] G2 G 21 16 50.79 +02 25 47.0           ~ 7 1
24 [ABW2001] G1 G 21 16 50.79 +02 25 47.0         18.2 ~ 8 1

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2022.05.23-09:33:28

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