Abstract
Strong gravitational lensing has traditionally been one of the few phenomena said to oppose a large cosmological constant; many analyses of lens statistics have given upper limits on ΩΛ that are marginally inconsistent with the concordance cosmology. Those conclusions were based on models in which the predicted number counts of galaxies at moderate redshifts (z ∼ 0.5-1) increased significantly with Ω Λ. I argue that the models should now be calibrated by counts of distant galaxies. When this is done, lens statistics lose most of their sensitivity to the cosmological constant.
| Original language | English (US) |
|---|---|
| Journal | Astrophysical Journal |
| Volume | 575 |
| Issue number | 1 II |
| DOIs | |
| State | Published - Aug 10 2002 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
Keywords
- Cosmological parameters
- Galaxies: evolution
- Gravitational lensing
Cite this
}
Rethinking lensing and Λ. / Keeton, Charles.
In: Astrophysical Journal, Vol. 575, No. 1 II, 10.08.2002.Research output: Contribution to journal › Article
TY - JOUR
T1 - Rethinking lensing and Λ
AU - Keeton, Charles
PY - 2002/8/10
Y1 - 2002/8/10
N2 - Strong gravitational lensing has traditionally been one of the few phenomena said to oppose a large cosmological constant; many analyses of lens statistics have given upper limits on ΩΛ that are marginally inconsistent with the concordance cosmology. Those conclusions were based on models in which the predicted number counts of galaxies at moderate redshifts (z ∼ 0.5-1) increased significantly with Ω Λ. I argue that the models should now be calibrated by counts of distant galaxies. When this is done, lens statistics lose most of their sensitivity to the cosmological constant.
AB - Strong gravitational lensing has traditionally been one of the few phenomena said to oppose a large cosmological constant; many analyses of lens statistics have given upper limits on ΩΛ that are marginally inconsistent with the concordance cosmology. Those conclusions were based on models in which the predicted number counts of galaxies at moderate redshifts (z ∼ 0.5-1) increased significantly with Ω Λ. I argue that the models should now be calibrated by counts of distant galaxies. When this is done, lens statistics lose most of their sensitivity to the cosmological constant.
KW - Cosmological parameters
KW - Galaxies: evolution
KW - Gravitational lensing
UR - http://www.scopus.com/inward/record.url?scp=0012887130&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0012887130&partnerID=8YFLogxK
U2 - 10.1086/342558
DO - 10.1086/342558
M3 - Article
VL - 575
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1 II
ER -