×ばつ 10<SUP>15</SUP> M <SUB>☉</SUB> h <SUP>-1</SUP> and a halo concentration c <SUB>vir</SUB> = 6.9 ± 1.0 ± 1.2 (c <SUB>vir</SUB> ~ 5.7 when the central 50 kpc h <SUP>-1</SUP> is excluded), which falls in the range 4 &lt;~ langcrang &lt;~ 7 of average c(M, z) predictions for relaxed clusters from recent Λ cold dark matter simulations. Our full-lensing results are found to be in agreement with X-ray mass measurements where the data overlap, and when combined with Chandra gas mass measurements, they yield a cumulative gas mass fraction of 13.7<SUP>+4.5</SUP> <SUB>- 3.0</SUB>% at 0.7 Mpc h <SUP>-1</SUP>(≈ 1.7 r <SUB>2500</SUB>), a typical value observed for high-mass clusters. <P />Based in part on data collected at the Subaru Telescope, which is operated by the National Astronomical Society of Japan."> ×ばつ 10<SUP>15</SUP> M <SUB>☉</SUB> h <SUP>-1</SUP> and a halo concentration c <SUB>vir</SUB> = 6.9 ± 1.0 ± 1.2 (c <SUB>vir</SUB> ~ 5.7 when the central 50 kpc h <SUP>-1</SUP> is excluded), which falls in the range 4 &lt;~ langcrang &lt;~ 7 of average c(M, z) predictions for relaxed clusters from recent Λ cold dark matter simulations. Our full-lensing results are found to be in agreement with X-ray mass measurements where the data overlap, and when combined with Chandra gas mass measurements, they yield a cumulative gas mass fraction of 13.7<SUP>+4.5</SUP> <SUB>- 3.0</SUB>% at 0.7 Mpc h <SUP>-1</SUP>(≈ 1.7 r <SUB>2500</SUB>), a typical value observed for high-mass clusters. <P />Based in part on data collected at the Subaru Telescope, which is operated by the National Astronomical Society of Japan."> ×ばつ 10<SUP>15</SUP> M <SUB>☉</SUB> h <SUP>-1</SUP> and a halo concentration c <SUB>vir</SUB> = 6.9 ± 1.0 ± 1.2 (c <SUB>vir</SUB> ~ 5.7 when the central 50 kpc h <SUP>-1</SUP> is excluded), which falls in the range 4 &lt;~ langcrang &lt;~ 7 of average c(M, z) predictions for relaxed clusters from recent Λ cold dark matter simulations. Our full-lensing results are found to be in agreement with X-ray mass measurements where the data overlap, and when combined with Chandra gas mass measurements, they yield a cumulative gas mass fraction of 13.7<SUP>+4.5</SUP> <SUB>- 3.0</SUB>% at 0.7 Mpc h <SUP>-1</SUP>(≈ 1.7 r <SUB>2500</SUB>), a typical value observed for high-mass clusters. <P />Based in part on data collected at the Subaru Telescope, which is operated by the National Astronomical Society of Japan."/>
[フレーム]
Now on home page

ADS

CLASH: Mass Distribution in and around MACS J1206.2-0847 from a Full Cluster Lensing Analysis

Abstract

We derive an accurate mass distribution of the galaxy cluster MACS J1206.2-0847 (z = 0.439) from a combined weak-lensing distortion, magnification, and strong-lensing analysis of wide-field Subaru BVR c I c z' imaging and our recent 16-band Hubble Space Telescope observations taken as part of the Cluster Lensing And Supernova survey with Hubble program. We find good agreement in the regions of overlap between several weak- and strong-lensing mass reconstructions using a wide variety of modeling methods, ensuring consistency. The Subaru data reveal the presence of a surrounding large-scale structure with the major axis running approximately northwest-southeast (NW-SE), aligned with the cluster and its brightest galaxy shapes, showing elongation with a ~2: 1 axis ratio in the plane of the sky. Our full-lensing mass profile exhibits a shallow profile slope dln Σ/dln R ~ -1 at cluster outskirts (R >~ 1 Mpc h -1), whereas the mass distribution excluding the NW-SE excess regions steepens farther out, well described by the Navarro-Frenk-White form. Assuming a spherical halo, we obtain a virial mass M vir = (1.1 ± 0.2 ± 0.1) ×ばつ 1015 M ☉ h -1 and a halo concentration c vir = 6.9 ± 1.0 ± 1.2 (c vir ~ 5.7 when the central 50 kpc h -1 is excluded), which falls in the range 4 <~ langcrang <~ 7 of average c(M, z) predictions for relaxed clusters from recent Λ cold dark matter simulations. Our full-lensing results are found to be in agreement with X-ray mass measurements where the data overlap, and when combined with Chandra gas mass measurements, they yield a cumulative gas mass fraction of 13.7+4.5 - 3.0% at 0.7 Mpc h -1(≈ 1.7 r 2500), a typical value observed for high-mass clusters.

Based in part on data collected at the Subaru Telescope, which is operated by the National Astronomical Society of Japan.


Publication:
The Astrophysical Journal
Pub Date:
August 2012
DOI:

10.1088/0004-637X/755/1/56

10.48550/arXiv.1204.3630

arXiv:
arXiv:1204.3630
Bibcode:
2012ApJ...755...56U
Keywords:
  • cosmology: observations;
  • dark matter;
  • galaxies: clusters: individual: MACS J1206.2-0847;
  • gravitational lensing: strong;
  • gravitational lensing: weak;
  • Astrophysics - Cosmology and Nongalactic Astrophysics
E-Print:
Accepted by ApJ (30 pages, 17 figures), one new figure (Figure 10) added, minor text changes
🌓

AltStyle によって変換されたページ (->オリジナル) /