File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Free-form lensing implications for the collision of dark matter and gas in the frontier fields cluster MACS J0416.1−2403

TitleFree-form lensing implications for the collision of dark matter and gas in the frontier fields cluster MACS J0416.1−2403
Authors
KeywordsDark matter
Galaxies: clusters: general
Galaxies: Clusters: individual: MACS J0416.1-2403
Methods: data analysis
Issue Date2015
PublisherOxford University press, co-published with Royal Astronomical Society. The Journal's web site is located at http://www.oxfordjournals.org/our_journals/mnras/
Citation
Monthly Notices of the Royal Astronomical Society, 2015, v. 447 n. 4, p. 3130-3149 How to Cite?
AbstractWe present a free-form mass reconstruction of the massive lensing cluster MACS J0416.1−2403 using the latest Hubble Frontier Fields data. Our free-form method finds that the extended lensing pattern is generated by two elongated, closely projected clusters of similar mass. Our lens model identifies new lensed images with which we improve the accuracy of the dark matter distribution. We find that the bimodal mass distribution is nearly coincident with the bimodal X-ray emission, but with the two dark matter peaks lying closer together than the centroids of the X-ray emission. We can reproduce this behaviour with our hydrodynamical model, concluding that the clusters are significantly deflected around each other with the plane of the collision lying close to the line of sight. The projected mass profiles of both subclusters are well constrained in the region 30–165 kpc because of the many interior lensed images, leading to surprisingly flat mass profiles of both components at distances 30–100 kpc from the centre, in agreement with recent simulations of self-interacting dark matter. Using N-body simulations, we discuss the extent to which this may be generated by projection effects in our model as the cores graze each other. The relative velocity between the two cores is estimated to be about 1200 km s−1 and mostly along the line of sight so that our simulation is consistent with the relative redshift difference between the two cD galaxies (δz ≈ 0.04).
Persistent Identifierhttp://hdl.handle.net/10722/209812
ISSN
2019 Impact Factor: 5.356
2015 SCImago Journal Rankings: 2.806
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorDiego, JM-
dc.contributor.authorBroadhurst, T-
dc.contributor.authorMolnar, SM-
dc.contributor.authorLam, CC-
dc.contributor.authorLim, JJL-
dc.date.accessioned2015-05-18T03:25:34Z-
dc.date.available2015-05-18T03:25:34Z-
dc.date.issued2015-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2015, v. 447 n. 4, p. 3130-3149-
dc.identifier.issn0035-8711-
dc.identifier.urihttp://hdl.handle.net/10722/209812-
dc.description.abstractWe present a free-form mass reconstruction of the massive lensing cluster MACS J0416.1−2403 using the latest Hubble Frontier Fields data. Our free-form method finds that the extended lensing pattern is generated by two elongated, closely projected clusters of similar mass. Our lens model identifies new lensed images with which we improve the accuracy of the dark matter distribution. We find that the bimodal mass distribution is nearly coincident with the bimodal X-ray emission, but with the two dark matter peaks lying closer together than the centroids of the X-ray emission. We can reproduce this behaviour with our hydrodynamical model, concluding that the clusters are significantly deflected around each other with the plane of the collision lying close to the line of sight. The projected mass profiles of both subclusters are well constrained in the region 30–165 kpc because of the many interior lensed images, leading to surprisingly flat mass profiles of both components at distances 30–100 kpc from the centre, in agreement with recent simulations of self-interacting dark matter. Using N-body simulations, we discuss the extent to which this may be generated by projection effects in our model as the cores graze each other. The relative velocity between the two cores is estimated to be about 1200 km s−1 and mostly along the line of sight so that our simulation is consistent with the relative redshift difference between the two cD galaxies (δz ≈ 0.04).-
dc.languageeng-
dc.publisherOxford University press, co-published with Royal Astronomical Society. The Journal's web site is located at http://www.oxfordjournals.org/our_journals/mnras/-
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society-
dc.rightsThis article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.-
dc.subjectDark matter-
dc.subjectGalaxies: clusters: general-
dc.subjectGalaxies: Clusters: individual: MACS J0416.1-2403-
dc.subjectMethods: data analysis-
dc.titleFree-form lensing implications for the collision of dark matter and gas in the frontier fields cluster MACS J0416.1−2403-
dc.typeArticle-
dc.identifier.emailLim, JJL: jjlim@hku.hk-
dc.identifier.authorityLim, JJL=rp00745-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1093/mnras/stu2660-
dc.identifier.scopuseid_2-s2.0-85017177131-
dc.identifier.hkuros243087-
dc.identifier.volume447-
dc.identifier.issue4-
dc.identifier.spage3130-
dc.identifier.epage3149-
dc.identifier.isiWOS:000350273400013-
dc.publisher.placeUnited Kingdom-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats