J/ApJ/855/142 Next Generation Fornax Survey (NGFS) II. (Eigenthaler+, 2018)
The Next Generation Fornax Survey (NGFS).
II. The central dwarf galaxy population.
Eigenthaler P., Puzia T.H., Taylor M.A., Ordenes-Briceno Y., Munoz R.P.,
Ribbeck K.X., Alamo-Martinez K.A., Zhang H., Angel S., Capaccioli M.,
Cote P., Ferrarese L., Galaz G., Grebel E.K., Hempel M., Hilker M.,
Lancon A., Mieske S., Miller B., Paolillo M., Powalka M., Richtler T.,
Roediger J., Rong Yu, Sanchez-Janssen R., Spengler C.
<Astrophys. J., 855, 142 (2018)>
=2018ApJ...855..142E 2018ApJ...855..142E
ADC_Keywords: Clusters, galaxy; Galaxies, photometry; Morphology; Optical
Keywords: galaxies: clusters: individual (Fornax) ; galaxies: dwarf ;
galaxies: elliptical and lenticular, cD ;
galaxies: fundamental parameters ; galaxies: stellar content
Abstract:
We present a photometric study of the dwarf galaxy population in the
core region (≲rvir/4) of the Fornax galaxy cluster based on deep
u'g'i' photometry from the Next Generation Fornax Cluster Survey. All
imaging data were obtained with the Dark Energy Camera mounted on the
4m Blanco telescope at the Cerro Tololo Interamerican Observatory. We
identify 258 dwarf galaxy candidates with luminosities -17≲Mg'≲-8mag,
corresponding to typical stellar masses of 9.5≳logM*/M☉≳5.5,
reaching ∼3mag deeper in point-source luminosity and ∼4mag deeper in
surface brightness sensitivity compared to the classic Fornax Cluster
Catalog. Morphological analysis shows that the dwarf galaxy
surface-brightness profiles are well represented by single-component
Sersic models with average Sersic indices of
u',g',i'=(0.78-0.83)±0.02 and average effective radii of
<re>u',g',i'=(0.67-0.70±0.02kpc. Color-magnitude relations
indicate a flattening of the galaxy red sequence at faint galaxy
luminosities, similar to the one recently discovered in the Virgo
cluster. A comparison with population synthesis models and the galaxy
mass-metallicity relation reveals that the average faint dwarf galaxy
is likely older than ∼5Gyr. We study galaxy scaling relations between
stellar mass, effective radius, and stellar mass surface density over
a stellar mass range covering six orders of magnitude. We find that
over the sampled stellar mass range several distinct mechanisms of
galaxy mass assembly can be identified: (1) dwarf galaxies assemble
mass inside the half-mass radius up to logM*∼8.0, (2) isometric mass
assembly occurs in the range 8.0≲logM*/M☉≲10.5, and (3)
massive galaxies assemble stellar mass predominantly in their halos at
logM*∼10.5 and above.
Description:
The Next Generation Fornax Survey (NGFS) is an ongoing survey of the
Fornax galaxy cluster core in the optical u', g', and i' and the
near-infrared (NIR) J and Ks filters, targeting the inner 30deg2,
corresponding to ∼1Mpc in galactocentric radius centered on the cD
galaxy NGC1399. Here we focus on the NGFS optical survey observations,
which consist of nine contiguous Dark Energy Camera (DECam) tiles
mounted on the 4m Blanco telescope at the Cerro Tololo Interamerican
Observatory in Chile.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 105 258 Photometric properties and stellar masses of
the dwarf galaxy sample
table2.dat 96 258 Structural properties of the dwarf sample
--------------------------------------------------------------------------------
See also:
III/232 : STELIB: A library of stellar spectra at R∼2000 (Le Borgne+, 2003)
VII/180 : Galaxies in Fornax Cluster and five nearby groups (Ferguson+ 1990)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/AJ/90/1681 : The Virgo Cluster Catalog (VCC) (Binggeli+, 1985)
J/A+AS/127/409 : New nearby dwarf galaxy candidates list (Karachentseva+ 1998)
J/MNRAS/335/712 : R magnitude of cluster of galaxies (Trentham+, 2002)
J/ApJS/157/1 : Red-Sequence Cluster Survey (Gladders+, 2005)
J/MNRAS/363/1019 : Nucleated dwarf ellipticals in Virgo cluster (Grant+, 2005)
J/ApJS/161/304 : Star clusters in the MW and satellites (McLaughlin+, 2005)
J/ApJ/621/673 : Line indices for 124 early-type galaxies (Thomas+, 2005)
J/ApJS/164/334 : ACS Virgo Cluster Survey. VI (Ferrarese+, 2006)
J/MNRAS/371/703 : MILES library of empirical spectra (Sanchez-Blazquez+, 2006)
J/AJ/133/504 : Galaxies around CenA/M83 galaxy complex (Karachentsev+, 2007)
J/ApJ/660/1186 : VCC galaxies classification with SDSS (Lisker+, 2007)
J/A+A/463/503 : Early-type dwarf galaxies in Fornax cluster (Mieske+, 2007)
J/A+A/486/697 : Hydra I Cluster Catalogue (HCC) (Misgeld+, 2008)
J/MNRAS/386/2311 : CT1 photometry of Antlia early-type galaxies (Smith+, 2008)
J/ApJS/182/216 : Surface photometry of Virgo ellipticals (Kormendy+, 2009)
J/A+A/513/A52 : Velocities of NGC 1399 globular clusters (Schuberth+, 2010)
J/MNRAS/413/813 : ATLAS3D project. I. (Cappellari+, 2011)
J/ApJS/197/21 : The Carnegie-Irvine Galaxy Survey (CGS). I. (Ho+, 2011)
J/MNRAS/414/3699 : Study of hot stellar systems and galaxies (Misgeld+, 2011)
J/ApJ/726/108 : Dispersion-supported stellar systems (Tollerud+, 2011)
J/AJ/144/4 : Dwarf galaxies in the Local Group (McConnachie+, 2012)
J/ApJ/763/40 : UBVI of GCs in the Fornax galaxy cluster (Kim+, 2013)
J/ApJ/779/102 : Metallicities of RGB stars in dwarf galaxies (Kirby+, 2013)
J/ApJ/812/34 : UCD candidates in M87/M49/M60 regions (Liu+, 2015)
J/ApJ/813/L15 : Dwarf galaxies in Fornax cluster from NGFS (Munoz+, 2015)
J/ApJ/805/65 : FLAMES obs. of NGC 5128's globular clusters (Taylor+, 2015)
J/ApJ/802/30 : NGVS VI. Ultra-compact dwarfs in M87 (Zhang+, 2015)
J/ApJS/227/12 : NGVS XXV. Virgo globular clusters photometry (Powalka+, 2016)
J/MNRAS/459/4450 : Peculiar compact stellar systems in Fornax (Wittmann+, 2016)
J/MNRAS/469/3444 : Centaurus A's Baryonic Structures II. (Taylor+, 2017)
J/A+A/608/A142 : Fornax Deep Survey with VST. III. (Venhola+, 2017)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq [1/258] Internal index number
5- 8 A4 --- --- [NGFS]
9- 21 A13 --- NGFS Identifier (HHMMSS+DDMMSS; J2000)
23- 34 A12 --- Ref Reference to galaxies listed (G1)
36- 44 F9.6 deg RAdeg [53.2/56] Right Ascension (J2000)
46- 55 F10.6 deg DEdeg [-36.6/-34.5] Declination (J2000)
57- 61 F5.2 mag i'mag [13/22.2]? Apparent CTIO/DECam i' band
AB magnitude
63- 67 F5.2 mag g'mag [14.2/22.9]? Apparent CTIO/DECam g' band
AB magnitude
69- 73 F5.2 mag u'mag [15.4/22.9]? Apparent CTIO/DECam u' band
AB magnitude
75- 78 F4.2 mag (g'-i')0 [0.1/2.3]? Intrinsic (g'-i') color index
80- 84 F5.2 mag (u'-g')0 [-0.2/1.9]? Intrinsic (u'-g') color index
86- 89 F4.2 mag (u'-i')0 [0.5/2.8]? Intrinsic (u'-i') color index
91- 96 F6.2 mag g'Mag [-17.3/-8.5]? Absolute g' band magnitude (1)
98-105 F8.6 [Msun] logM* [5.7/9.6]? Log stellar mass
--------------------------------------------------------------------------------
Note (1): Assuming a distance modulus of (m-M)0=31.51
(Blakeslee+ 2009ApJ...694..556B 2009ApJ...694..556B).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq [1/258] Internal index number
5- 8 A4 --- --- [NGFS]
9- 21 A13 --- NGFS Identifier (HHMMSS+DDMMSS; J2000)
23- 34 A12 --- Ref Reference to galaxies listed (G1)
36 A1 --- Type [ox] Morphological galaxy type classification
(x=non-nucleated or o=nucleated dwarf galaxy)
38- 42 F5.3 kpc rei [0.1/2.8]? The i' band effective radii
44- 47 F4.2 --- ni [0.08/2.3]? The i' band Sersic index (2)
49- 52 F4.2 --- elli [0/0.7]? The i' band ellipticity (1-b/a)
54- 56 I3 deg PAi ? The i' band position angle (3)
58- 62 F5.3 kpc reg [0.1/2.4]? The g' band effective radii
64- 67 F4.2 --- ng [0.06/1.7]? The g' band Sersic index (2)
69- 72 F4.2 --- ellg [0/0.7]? The g' band ellipticity (1-b/a)
74- 76 I3 deg PAg ? The g' band position angle (3)
78- 82 F5.3 kpc reu [0.03/1.9]? The u' band effective radii
84- 87 F4.2 --- nu [0.1/2.4]? The u' band Sersic index (2)
89- 92 F4.2 --- ellu [0/0.7]? The u' band ellipticity (1-b/a)
94- 96 I3 deg PAu [5/180]? The u' band position angle (3)
--------------------------------------------------------------------------------
Note (2): Sersic (1968adga.book.....S 1968adga.book.....S) and Caon+ (1993MNRAS.265.1013C 1993MNRAS.265.1013C).
Note (3): Position angle measured from North towards East.
--------------------------------------------------------------------------------
Global notes:
Note (G1): In the FCC catalog (Ferguson 1989AJ....98...367F 1989AJ....98...367F) and in
Mieske+ (2007, J/A+A/463/503).
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Munoz et al. Paper I 2015ApJ...813L..15M 2015ApJ...813L..15M J/ApJ/813/L15
Eigenthaler et al. Paper II 2018ApJ...855..142E 2018ApJ...855..142E This catalog
Ordenes-Briceno et al. Paper III 2018ApJ...859...52O 2018ApJ...859...52O J/ApJ/859/52
Ordenes-Briceno et al. Paper IV 2018ApJ...860....4O 2018ApJ...860....4O J/ApJ/860/4
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 23-Jan-2019