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Lensed Type Ia Supernovae as Probes of Cluster Mass Models

Title: Lensed Type Ia Supernovae as Probes of Cluster Mass Models.
Name(s): Nordin, J., author
Rubin, David, author
Richard, J., author
Aldering, G., author
Type of Resource: text
Genre: Text
Issuance: serial
Date Issued: 2014
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: Using three magnified Type Ia supernovae (SNe Ia) detected behind CLASH (Cluster Lensing and Supernovae with Hubble) 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 Hubble Space Telescope 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 Ia and the third probable. The SNe exhibit significant amplification, up to a factor of 1.7 at ∼5 σ 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 ± 0.09 stat ± 0.05 sys mag. This impressive agreement suggests no tension between cluster mass models and high-redshift-standardized SNe Ia. However, the measured statistical disper- sion of σ μ = 0.21 mag appeared large compared to the dispersion expected based on statistical uncertainties (0.14). Further work with the SN and cluster lensing models, post-unblinding, reduced the measured dispersion to σ μ = 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.
Identifier: FSU_migr_phy_faculty_publications-0001 (IID), 10.1093/mnras/stu376 (DOI)
Keywords: gravitational lensing, supernovae, galaxies clusters, cosmology observations, dark matter
Note: This article has been accepted for publication in MNRAS ©: 2014 authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.'>"> Final publisher's version allowed per Oxford Journals archiving policy and author's request.
Citation: J. Nordin, D. Rubin, J. Richard, E. Rykoff et al. Lensed Type Ia supernovae as probes of cluster mass models. Monthly Notices of the Royal Astronomical Society 440 (3). 2742-2754. DOI:10.1093/mnras/stu376
Subject(s): Cosmology
Interstellar matter
Persistent Link to This Record:
Owner Institution: FSU
Is Part of Series: Department of Physics Faculty Publications.
Is Part Of: Monthly Notices of the Royal Astronomical Society.
Issue: 3, 440

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Nordin, J., Rubin, D., Richard, J., & Aldering, G. (2014). Lensed Type Ia Supernovae as Probes of Cluster Mass Models. Monthly Notices Of The Royal Astronomical Society. Retrieved from