Back to Search
Start Over
A More Fundamental Plane
A More Fundamental Plane
- Source :
- Astrophysical Journal, 665(2), L105-L108. IOP PUBLISHING LTD
- Publication Year :
- 2007
- Publisher :
- arXiv, 2007.
-
Abstract
- We combine strong-lensing masses with SDSS stellar velocity dispersions and HST-ACS effective (half-light) radii for 36 lens galaxies from the Sloan Lens ACS (SLACS) Survey to study the mass dependence of mass-dynamical structure in early-type galaxies. We find that over a 180--390 km/s range in velocity dispersion, structure is independent of lensing mass to within 5%. This result suggests a systematic variation in the total (i.e., luminous plus dark matter) mass-to-light ratio as the origin of the tilt of the fundamental plane (FP) scaling relationship between galaxy size, velocity dispersion, and surface brightness. We construct the FP of the lens sample, which we find to be consistent with the FP of the parent SDSS early-type galaxy population, and present the first observational correlation between mass-to-light ratio and residuals about the FP. Finally, we re-formulate the FP in terms of surface mass density rather than surface brightness. By removing the complexities of stellar-population effects, this mass-plane formulation will facilitate comparison to numerical simulations and possible use as a cosmological distance indicator.<br />Comment: 4+epsilon pages, 1 figure, emulateapj. Revised version accepted for publication in the ApJ Letters
- Subjects :
- GRAVITATIONAL LENS
gravitational lensing
Dark matter
Population
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
SCALING RELATIONS
01 natural sciences
cD
STAR-FORMATION
STELLAR POPULATIONS
ELLIPTIC GALAXIES
0103 physical sciences
galaxies : elliptical and lenticular
EARLY-TYPE GALAXIES
INTERMEDIATE-REDSHIFT
Surface brightness
education
010303 astronomy & astrophysics
Scaling
Astrophysics::Galaxy Astrophysics
Physics
education.field_of_study
Lens sample
010308 nuclear & particles physics
LENS ACS SURVEY
Astrophysics (astro-ph)
Velocity dispersion
Astronomy and Astrophysics
Galaxy
Space and Planetary Science
DIGITAL SKY SURVEY
Fundamental plane (elliptical galaxies)
FIELD GALAXIES
Subjects
Details
- ISSN :
- 0004637X
- Database :
- OpenAIRE
- Journal :
- Astrophysical Journal, 665(2), L105-L108. IOP PUBLISHING LTD
- Accession number :
- edsair.doi.dedup.....57e3bfd6c37cc3dabbc1803eb6c9f42d
- Full Text :
- https://doi.org/10.48550/arxiv.astro-ph/0701706