J/ApJ/776/91 Spectroscopic redshifts of galaxies in 2 clusters (Lemze+, 2013)
The contribution of halos with different mass ratios to the overall growth of
cluster-sized halos.
Lemze D., Postman M., Genel S., Ford H.C., Balestra I., Donahue M.,
Kelson D., Nonino M., Mercurio A., Biviano A., Rosati P., Umetsu K.,
Sand D., Koekemoer A., Meneghetti M., Melchior P., Newman A.B.,
Bhatti W.A., Voit G.M., Medezinski E., Zitrin A., Zheng W., Broadhurst T.,
Bartelmann M., Benitez N., Bouwens R., Bradley L., Coe D., Graves G.,
Grillo C., Infante L., Jimenez-Teja Y., Jouvel S., Lahav O., Maoz D.,
Merten J., Molino A., Moustakas J., Moustakas L., Ogaz S., Scodeggio M.,
Seitz S.
<Astrophys. J., 776, 91 (2013)>
=2013ApJ...776...91L 2013ApJ...776...91L
ADC_Keywords: Clusters, galaxy ; Galaxies, spectra ; Redshifts
Keywords: dark matter; galaxies: clusters: individual (Abell 611, Abell 963,
Abell 1423, Abell 2261, MACS J1206.2-0848, RX J2129.7+0005,
CL 2130.4-0000); galaxies: kinematics and dynamics
Abstract:
We provide a new observational test for a key prediction of the
ΛCDM cosmological model: the contributions of mergers with
different halo-to-main-cluster mass ratios to cluster-sized halo
growth. We perform this test by dynamically analyzing 7 galaxy
clusters, spanning the redshift range 0.13<zc<0.45 and caustic mass
range 0.4-1.5x1015h0.73-1M☉, with an average of 293
spectroscopically confirmed bound galaxies to each cluster. The large
radial coverage (a few virial radii), which covers the whole infall
region, with a high number of spectroscopically identified galaxies
enables this new study. For each cluster, we identify bound galaxies.
Out of these galaxies, we identify infalling and accreted halos and
estimate their masses and their dynamical states. Using the estimated
masses, we derive the contribution of different mass ratios to
cluster-sized halo growth. For mass ratios between ∼0.2 and ∼0.7, we
find a ∼1σ agreement with ΛCDM expectations based on the
Millennium simulations I and II. At low mass ratios, ≲0.2, our
derived contribution is underestimated since the detection efficiency
decreases at low masses, ∼2x1014h0.73-1M☉. At large mass
ratios, ≳0.7, we do not detect halos probably because our sample,
which was chosen to be quite X-ray relaxed, is biased against large
mass ratios. Therefore, at large mass ratios, the derived contribution
is also underestimated.
Description:
Spectra for galaxies in the environs of each cluster were drawn from a
combination of existing data and new observations. For A611, A963,
A1423, A2261, RXJ2129, and CL2130 the bulk of the redshifts were
obtained using the Hectospec instrument on the MMT. The sample
selection, observational parameters, and data reduction procedures for
the Hectospec data are described in detail in Rines et al. (2013,
J/ApJ/767/15), except for ∼50% of A611 redshifts, which were first
used in Newman et al. (2013ApJ...765...25N 2013ApJ...765...25N, 2013ApJ...765...24N 2013ApJ...765...24N).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 47 709 ClG 2130.4-0000 MMT/Hectospec spectroscopic redshifts
table2.dat 47 1500 ACO 611 MMT/Hectospec spectroscopic redshifts
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See also:
VII/259 : 6dF galaxy survey final redshift release (Jones+, 2009)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
VII/86 : Groups of Galaxies. I. Nearby Groups (Huchra+ 1982)
J/ApJS/208/20 : Nine-year WMAP point source catalogs (Bennett+, 2013)
J/ApJ/767/15 : Hectospec Cluster Survey (HeCS) (Rines+, 2013)
J/ApJ/757/22 : Strong and weak lensing analysis of A2261 (Coe+, 2012)
J/MNRAS/424/2086 : LX-T relation in galaxy clusters (Hilton+, 2012)
J/MNRAS/423/1024 : XCS-DR1 Cluster Catalogue (Mehrtens+, 2012)
J/ApJS/199/34 : Clusters of galaxies in SDSS-III (Wen+, 2012)
J/ApJS/199/25 : CLASH sources for MACS1149.6+2223 (Postman+, 2012)
J/ApJS/182/12 : ICM entropy profiles (ACCEPT) (Cavagnolo+, 2009)
J/ApJ/660/239 : MaxBCG cat. of 13823 galaxy clusters from SDSS (Koester+, 2007)
J/AJ/132/1275 : CIRS (Cluster Infall Regions in the SDSS). I. (Rines+, 2006)
J/A+A/448/893 : Photometry & lines of (z∼0.2-1.0) galaxies (Lamareille+, 2006)
J/AJ/126/2152 : Cluster And Infall Region Nearby Survey. I (Rines+, 2003)
J/AJ/124/1266 : Redshift survey around Abell 2199 (Rines+, 2002)
Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
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1- 11 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
13- 22 F10.7 deg DEdeg Declination in decimal degrees (J2000)
24- 32 F9.6 --- z [-0.001/2.9] Heliocentric redshift (1)
34- 41 F8.6 --- e_z [0.00001/0.002] Error in z
43- 47 F5.2 --- R [0/38] Tonry & Davis 1979AJ.....84.1511T 1979AJ.....84.1511T
cross correlation coefficient (Rcross)
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Note (1): data from
* ClG 2130.4-0000: Rines et al. 2013 (J/ApJ/767/15)
* ACO 611: Rines et al. 2013 (J/ApJ/767/15); and also in Newman et al.
2013ApJ...765...24N 2013ApJ...765...24N, 2013ApJ...765...25N 2013ApJ...765...25N.
If someone uses these data, please give credit also to these papers
(Rines et al. 2013ApJ...767...15R 2013ApJ...767...15R; and Newman et al.
2013ApJ...765...24N 2013ApJ...765...24N, 2013ApJ...765...25N 2013ApJ...765...25N).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 23-Mar-2015