J/ApJ/749/97 Multiple lensed images in MCS J1206.2-0847 (Zitrin+, 2012)
CLASH: new multiple images constraining the inner mass profile of
MACS J1206.2-0847.
Zitrin A., Rosati P., Nonino M., Grillo C., Postman M., Coe D., Seitz S.,
Eichner T., Broadhurst T., Jouvel S., Balestra I., Mercurio A.,
Scodeggio M., Benitez N., Bradley L., Ford H., Host O., Jimenez-Teja Y.,
Koekemoer A., Zheng W., Bartelmann M., Bouwens R., Czoske O., Donahue M.,
Graur O., Graves G., Infante L., Jha S., Kelson D., Lahav O., Lazkoz R.,
Lemze D., Lombardi M., Maoz D., McCully C., Medezinski E., Melchior P.,
Meneghetti M., Merten J., Molino A., Moustakas L.A., Ogaz S., Patel B.,
Regoes E., Riess A., Rodney S., Umetsu K., Van der Wel A.
<Astrophys. J., 749, 97 (2012)>
=2012ApJ...749...97Z 2012ApJ...749...97Z
ADC_Keywords: Gravitational lensing ; Clusters, galaxy ; Redshifts
Keywords: dark matter - galaxies: clusters: general -
galaxies: clusters: individual: (MACS J1206.2-0847) -
galaxies: high-redshift - gravitational lensing: strong
Abstract:
We present a strong-lensing analysis of the galaxy cluster
MACS J1206.2-0847 (z=0.44) using UV, Optical, and IR, HST/ACS/WFC3
data taken as part of the CLASH multi-cycle treasury program, with
VLT/VIMOS spectroscopy for some of the multiply lensed arcs. The CLASH
observations, combined with our mass model, allow us to identify 47
new multiply lensed images of 12 distant sources. These images, along
with the previously known arc, span the redshift range 1≲z≲5.5, and
thus enable us to derive a detailed mass distribution and to
accurately constrain, for the first time, the inner mass profile of
this cluster. We find an inner profile slope of
dlogΣ/dlogθ≃-0.55±0.1 (in the range [1",53"], or
5kpc≲r≲300kpc), as commonly found for relaxed and well-concentrated
clusters. Using the many systems uncovered here we derive credible
critical curves and Einstein radii for different source redshifts. For
a source at zs≃2.5, the critical curve encloses a large area with
an effective Einstein radius of θE=28"±3", and a projected
mass of (1.34±0.15)x1014M☉. From the current understanding
of structure formation in concordance cosmology, these values are
relatively high for clusters at z∼0.5, so that detailed studies of the
inner mass distribution of clusters such as MACS J1206.2-0847 can
provide stringent tests of the ΛCDM paradigm.
Description:
As part of the CLASH program, MACS1206 was observed with HST from 2011
March to 2011 July. This is 1 of 25 clusters to be observed to a depth
of 20 HST orbits in 16 filters with the Wide Field Camera 3 (WFC3)
UVIS and IR cameras, and the ACS WFC.
We obtain spectra for a number of multiple systems uncovered here,
taken as part of the VLT/VIMOS Large Programme 186.A-0798, which will
perform panoramic spectroscopy of 14 southern CLASH clusters,
targeting hundreds of cluster members per cluster and SL features in
their cores. The spectra presented here are the results of the very
first observations for this program, consisting of four pointings with
the LR-Blue grism, obtained in 2011 March-April, which yielded
approximately 1000 redshifts. This configuration provides a spectral
resolution of ∼28Å with 1" slits and a useful wavelength coverage
of 3700-6800Å.
Objects:
-------------------------------------------------------------
RA (2000) DE Designation(s)
-------------------------------------------------------------
12 06 12.2 -08 48 02 MACS J1206.2-0847 = MCS J1206.2-0847
-------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 117 50 Multiple-image systems and candidates
--------------------------------------------------------------------------------
See also:
J/ApJS/199/25 : CLASH sources for MACS1149.6+2223 (Postman+, 2012)
J/MNRAS/406/1318 : Lensed-arc statistics of galaxy clusters (Horesh+, 2010)
J/A+A/499/357 : REFLEX galaxies redshifts (Guzzo+, 2009)
J/MNRAS/392/1509 : Distribution of AGNs in galaxy clusters (Gilmour+, 2009)
J/ApJ/668/643 : Multiply imaged gravitational lens systems (Limousin+, 2007)
J/ApJ/621/53 : Multiple arc systems in A1689 (Broadhurst+, 2005)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 F4.1 --- ID Arc identification (1.1 to 13.3); see Figure 1
(<[ZRN2012] NN.N> in Simbad)
6- 7 I2 h RAh [12] Hour of Right Ascension (J2000)
9- 10 I2 min RAm [6] Minute of Right Ascension (J2000)
12- 17 F6.3 s RAs [10/16] Second of of Right Ascension (J2000)
19 A1 --- DE- [-] Sign of the Declination (J2000)
20- 21 I2 deg DEd [8] Degree of Declination (J2000)
23- 24 I2 arcmin DEm [47/48] Arcminute of Declination (J2000)
26- 30 F5.2 arcsec DEs Arcsecond of Declination (J2000)
32- 35 F4.2 --- zBP [1/5.5]? Photometric redshift from BPZ (1)
37- 40 F4.2 --- E_zBP [0.2/5.3]? Upper 95% confidence level in zBP
42- 45 F4.2 --- e_zBP [1/5.8]? Lower 95% confidence level in zBP
47- 50 F4.2 --- zLP [0.2/5.6]? Photometric redshift from LePhare (2)
52- 55 F4.2 --- E_zLP [0.04/5.3]? Upper 90% confidence level in zLP
57- 60 F4.2 --- e_zLP [1/5.8]? Lower 90% confidence level in zLP
62- 66 F5.3 --- zsp [1/3.1]? Spectroscopic redshift
67 A1 --- f_zsp [n] n = not spectroscopically measured here
72 A1 --- u_zMod [~] Approximate flag on zMod
73- 77 F5.3 --- zMod [1/5.7]? Redshift predicted by the model
for each system (4)
78 A1 --- f_zMod [n] spectroscopy for at least one of its arcs
80- 82 F3.1 arcsec dPos [0/6.4] Positional difference (6)
84-117 A34 --- n_ID Comments on ID (7)
--------------------------------------------------------------------------------
Note (1): BPZ program from Benitez 2000ApJ...536..571B 2000ApJ...536..571B; Benitez et al. 2004,
Cat. J/ApJS/150/1; Coe et al. 2006, Cat. J/AJ/132/926
Note (2): LePhare program from Arnouts et al. 1999MNRAS.310..540A 1999MNRAS.310..540A;
Ilbert et al. 2006A&A...457..841I 2006A&A...457..841I
Note (4): For arcs which lack spectroscopy.
Note (6): Between the images reproduced by the model and the observed images.
Note (7): Note that unusually large errors in the photo-z imply a bimodal
distribution, as specified in the comments. We also denote in the
comments column where the most probable image was chosen but other
candidates are seen nearby. Systems 9 to 11 are designated as
candidate systems. For more details see Section 4.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 26-Nov-2013