J/ApJ/933/61 Brightest cluster galaxies from SDSS-IV MaNGA (Hsu+, 2022)
SDSS-IV MaNGA: Cannibalism caught in the act-on the frequency of occurrence of
multiple cores in Brightest Cluster Galaxies.
Hsu Y.-H., Lin Y.-T., Huang S., Nelson D., Rodriguez-Gomez V., Lai H.-T.,
Greene J., Leauthaud A., Aragon-Salamanca A., Bundy K., Emsellem E.,
Merrifield M., More S., Okabe N., Rong Yu, Brownstein J.R., Lane R.R.,
Pan K., Schneider D.P.
<Astrophys. J., 933, 61 (2022)>
=2022ApJ...933...61H 2022ApJ...933...61H
ADC_Keywords: Galaxies ; Redshifts ; Optical ; Spectroscopy
Keywords: Galaxy formation ; Galaxy clusters ; Elliptical galaxies ;
Galaxy mergers
Abstract:
Although it is generally accepted that massive galaxies form in a
two-phased fashion, beginning with a rapid mass buildup through
intense starburst activities followed by primarily dry mergers that
mainly deposit stellar mass at outskirts, the late time stellar mass
growth of brightest cluster galaxies (BCGs), the most massive galaxies
in the universe, is still not well understood. Several independent
measurements have indicated a slower mass growth rate than predictions
from theoretical models. We attempt to resolve the discrepancy by
measuring the frequency of BCGs with multiple cores, which serve as a
proxy of the merger rates in the central region and facilitate a more
direct comparison with theoretical predictions. Using 79 BCGs at
z=0.06-0.15 with integral field spectroscopic data from the Mapping
Nearby Galaxies at Apache Point Observatory (MaNGA) project, we obtain
a multiple-core fraction of 0.11±0.04 at z∼0.1 within an 18kpc radius
from the center, which is comparable to the value of 0.08±0.04
derived from mock observations of 218 simulated BCGs from the
cosmological hydrodynamical simulation IllustrisTNG. We find that most
cores that appear close to the BCGs from imaging data turn out to be
physically associated systems. Anchoring on the similarity in the
multiple-core frequency between the MaNGA and IllustrisTNG, we discuss
the mass growth rate of BCGs over the past 4.5Gyr.
Description:
Our parent brightest cluster galaxy (BCG) sample is taken from the
group and cluster catalog of Yang+ (2007ApJ...671..153Y 2007ApJ...671..153Y) updated to
the version based on SDSS data release 7. Among the three versions of
catalogs provided, we adopt the one that is constructed using the SDSS
model magnitude and includes additional redshifts from the literature,
in order to have the largest number of clusters. We apply a cut in the
cluster mass M180m≥1014h-1M☉, which results in
4033 clusters. The halo mass provided by Yang+ (2007) is estimated by
the ranking of total stellar mass of a cluster/group.
Matching the 4033 BCGs with the 8113 galaxies released from MaNGA
Product Launch-9 (MPL-9), we obtain 128 BCGs.
The 128 clusters lie at z=0.02-0.15, and are all detected in the
X-rays by Wang+ (2014, J/MNRAS/439/611).
See Section 2.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 62 128 *The 128 brightest cluster galaxies (BCGs) in
the MaNGA Product Launch-9 (MPL-9) sample
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Note on table2.dat: The 79 BCGs in the Main sample ("MPL-9" with problematic
BCGs removed and having IFU coverage to ≥18kpc; Section 3.2) can
be selected by setting the Selection flag to 1 and the IFU18 flag
to 1.
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See also:
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)
J/AJ/130/968 : SDSS-C4 cluster catalog (Miller+, 2005)
J/MNRAS/379/867 : BCG C4 cluster catalog (von der Linden+, 2007)
J/MNRAS/388/1537 : Galaxy pairs from SDSS-DR2 (McIntosh+, 2008)
J/AJ/137/4795 : Dynamical state of BCGs (Coziol+, 2009)
J/ApJS/182/216 : Surface photometry of Virgo ellipticals (Kormendy+, 2009)
J/MNRAS/439/611 : X-ray luminosities of SDSS DR7 cl. from RASS (Wang+, 2014)
J/MNRAS/446/3943 : galaxies 2D phot. decompositions in SDSS-DR7 (Meert+, 2015)
J/MNRAS/448/2530 : Morphology and structure of BCG (Zhao+, 2015)
J/ApJ/821/114 : The CGS. IV. Elliptical galaxies colors (Huang+, 2016)
J/MNRAS/455/2440 : 2D phot. decompositions in r, g & i bands (Meert+, 2016)
J/ApJ/816/98 : Gal. in X-ray clusters with DES. I. (Zhang+, 2016)
J/AJ/154/86 : MaNGA catalog, DR15 (Wake+, 2017)
J/AJ/155/188 : Nuclear activity in low-power radio galaxies (Lin+, 2018)
J/MNRAS/483/2057 : SDSS-IV MaNGA Morphological Catalogues (Fischer+, 2019)
J/A+A/649/A7 : MC structure and properties (Gaia Collaboration+, 2021)
J/A+A/653/A160 : Updated radial velocities from Gaia DR2 (Seabroke+, 2021)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1/128] Running sequence number
6- 16 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
18- 28 F11.8 deg DEdeg Declination in decimal degrees (J2000)
30- 38 F9.7 --- z [0.02/0.15] The catalog redshift (1)
40- 44 F5.2 [Msun] logM [14/15.1] log Halo mass
46- 56 A11 --- MaNGA MaNGA plate-ifu identifier
58 I1 --- Sel [0/1] Selection flag (1=the 115 BCGs
described in Section 2.1)
60 I1 --- Phot [0/2]? Photometry source (2)
62 I1 --- IFU18 [0/1] IFU coverage
(1=IFU coverage is at least 18kpc)
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Note (1): From Yang+ (Y07; 2007ApJ...671..153Y 2007ApJ...671..153Y). For the changed BCGs
mentioned in Section B.3, from SDSS or MaNGA.
Note (2): Flag as follows:
0 = The Ellipse-based Sersic fitting mentioned in Section 3.1 and Section A.
1 = Meert et al. 2016, J/MNRAS/455/2440
2 = Fischer et al. 2019, J/MNRAS/483/2057 (see Section A).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Katia van der Woerd [CDS] 18-Apr-2024