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Lensed Type Ia Supernovae as Probes of Cluster Mass Models
- Source :
- Monthly Notices of the Royal Astronomical Society, Monthly Notices of the Royal Astronomical Society, 2014, 440, pp.2742-2754. ⟨10.1093/MNRAS/STU376⟩, Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2014, 440, pp.2742-2754. ⟨10.1093/MNRAS/STU376⟩
- Publication Year :
- 2013
-
Abstract
- Using three magnified Type Ia supernovae (SNe Ia) detected behind CLASH clusters, we perform a first pilot study to see whether standardizable candles can be used to calibrate cluster mass maps created from strong lensing observations. Such calibrations will be crucial when next generation HST cluster surveys (e.g. FRONTIER) provide magnification maps that will, in turn, form the basis for the exploration of the high redshift Universe. We classify SNe using combined photometric and spectroscopic observations, finding two of the three to be clearly of type SN Ia and the third probable. The SNe exhibit significant amplification, up to a factor of 1.7 at $\sim5\sigma$ significance (SN-L2). We conducted this as a blind study to avoid fine tuning of parameters, finding a mean amplification difference between SNe and the cluster lensing models of $0.09 \pm 0.09^{stat} \pm 0.05^{sys}$ mag. This impressive agreement suggests no tension between cluster mass models and high redshift standardized SNe Ia. However, the measured statistical dispersion of $\sigma_{\mu}=0.21$ mag appeared large compared to the dispersion expected based on statistical uncertainties ($0.14$). Further work with the supernova and cluster lensing models, post unblinding, reduced the measured dispersion to $\sigma_{\mu}=0.12$. An explicit choice should thus be made as to whether SNe are used unblinded to improve the model, or blinded to test the model. As the lensed SN samples grow larger, this technique will allow improved constraints on assumptions regarding e.g. the structure of the dark matter halo.<br />Comment: Minor updates to match MNRAS published version. 15 pages, 7 figures. For additional info, see http://www.supernova.lbl.gov
- Subjects :
- Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
[SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
Dark matter
Strong gravitational lensing
Astronomy
FOS: Physical sciences
gravitational lensing: strong
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Galaxy
dark matter
Dark matter halo
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
Supernova
Gravitational lens
supernovae: general
Space and Planetary Science
galaxies: clusters: general
cosmology: observations
Astrophysics::Galaxy Astrophysics
Weak gravitational lensing
Galaxy cluster
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 00358711 and 13652966
- Database :
- OpenAIRE
- Journal :
- Monthly Notices of the Royal Astronomical Society, Monthly Notices of the Royal Astronomical Society, 2014, 440, pp.2742-2754. ⟨10.1093/MNRAS/STU376⟩, Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2014, 440, pp.2742-2754. ⟨10.1093/MNRAS/STU376⟩
- Accession number :
- edsair.doi.dedup.....85478181d088879e17ace29ca2b00c81