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Title: Testing light-traces-mass in Hubble Frontier Fields Cluster MACS-J0416.1-2403

Abstract

Here, we reconstruct the projected mass distribution of a massive merging Hubble Frontier Fields cluster MACSJ0416 using the genetic algorithm based free-form technique called Grale. The reconstructions are constrained by 149 lensed images identified by Jauzac et al. using HFF data. No information about cluster galaxies or light is used, which makes our reconstruction unique in this regard. Using visual inspection of the maps, as well as galaxy-mass correlation functions we conclude that overall light does follow mass. Furthermore, the fact that brighter galaxies are more strongly clustered with mass is an important confirmation of the standard biasing scenario in galaxy clusters. On the smallest scales, approximately less than a few arcseconds, the resolution afforded by 149 images is still not sufficient to confirm or rule out galaxy-mass offsets of the kind observed in ACO 3827. We also compare the mass maps of MACSJ0416 obtained by three different groups: Grale, and two parametric Lenstool reconstructions from the CATS and Sharon/Johnson teams. Overall, the three agree well; one interesting discrepancy between Grale and Lenstool galaxy-mass correlation functions occurs on scales of tens of kpc and may suggest that cluster galaxies are more biased tracers of mass than parametric methods generally assume.

Authors:
 [1];  [1];  [2];  [3];  [4]
  1. Univ. of Minnesota, Minneapolis, MN (United States)
  2. Univ. of Zurich, Zurich (Switzerland); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. Univ. of Zurich, Zurich (Switzerland)
  4. Univ. Hasselt, Diepenbeek (Belgium)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1350527
Report Number(s):
arXiv:1507.08960; FERMILAB-PUB-15-662-A
Journal ID: ISSN 0035-8711; 1385859
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 461; Journal Issue: 2; Journal ID: ISSN 0035-8711
Publisher:
Royal Astronomical Society
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; gravitational lensing: strong; galaxies: clusters: individual: MACS J0416.1+2403

Citation Formats

Sebesta, Kevin, Williams, Liliya L. R., Mohammed, Irshad, Saha, Prasenjit, and Liesenborgs, Jori. Testing light-traces-mass in Hubble Frontier Fields Cluster MACS-J0416.1-2403. United States: N. p., 2016. Web. doi:10.1093/mnras/stw1433.
Sebesta, Kevin, Williams, Liliya L. R., Mohammed, Irshad, Saha, Prasenjit, & Liesenborgs, Jori. Testing light-traces-mass in Hubble Frontier Fields Cluster MACS-J0416.1-2403. United States. doi:10.1093/mnras/stw1433.
Sebesta, Kevin, Williams, Liliya L. R., Mohammed, Irshad, Saha, Prasenjit, and Liesenborgs, Jori. Fri . "Testing light-traces-mass in Hubble Frontier Fields Cluster MACS-J0416.1-2403". United States. doi:10.1093/mnras/stw1433. https://www.osti.gov/servlets/purl/1350527.
@article{osti_1350527,
title = {Testing light-traces-mass in Hubble Frontier Fields Cluster MACS-J0416.1-2403},
author = {Sebesta, Kevin and Williams, Liliya L. R. and Mohammed, Irshad and Saha, Prasenjit and Liesenborgs, Jori},
abstractNote = {Here, we reconstruct the projected mass distribution of a massive merging Hubble Frontier Fields cluster MACSJ0416 using the genetic algorithm based free-form technique called Grale. The reconstructions are constrained by 149 lensed images identified by Jauzac et al. using HFF data. No information about cluster galaxies or light is used, which makes our reconstruction unique in this regard. Using visual inspection of the maps, as well as galaxy-mass correlation functions we conclude that overall light does follow mass. Furthermore, the fact that brighter galaxies are more strongly clustered with mass is an important confirmation of the standard biasing scenario in galaxy clusters. On the smallest scales, approximately less than a few arcseconds, the resolution afforded by 149 images is still not sufficient to confirm or rule out galaxy-mass offsets of the kind observed in ACO 3827. We also compare the mass maps of MACSJ0416 obtained by three different groups: Grale, and two parametric Lenstool reconstructions from the CATS and Sharon/Johnson teams. Overall, the three agree well; one interesting discrepancy between Grale and Lenstool galaxy-mass correlation functions occurs on scales of tens of kpc and may suggest that cluster galaxies are more biased tracers of mass than parametric methods generally assume.},
doi = {10.1093/mnras/stw1433},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 2,
volume = 461,
place = {United States},
year = {2016},
month = {6}
}

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Cited by: 9 works
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    Works referencing / citing this record:

    The ALMA Frontier Fields Survey: I. 1.1 mm continuum detections in Abell 2744, MACS J0416.1-2403 and MACS J1149.5+2223⋆
    journal, December 2016


    From the core to the outskirts: structure analysis of three massive galaxy clusters
    journal, May 2017


    From the core to the outskirts: structure analysis of three massive galaxy clusters
    journal, May 2017