J/MNRAS/378/1507 Spectroscopic study of 6 galaxies (Brough+, 2007)
Spatially resolved kinematics and stellar populations of brightest cluster and
group galaxies.
Brough S., Proctor R., Forbes D.A., Couch W.J., Collins C.A., Burke D.J.,
Mann R.G.
<Mon. Not. R. Astron. Soc., 378, 1507-1530 (2007)>
=2007MNRAS.378.1507B 2007MNRAS.378.1507B
ADC_Keywords: Clusters, galaxy ; Spectroscopy ; Radial velocities ; Abundances
Keywords: galaxies: clusters: general -
galaxies: elliptical and lenticular, cD - galaxies: evolution -
galaxies: formation
Abstract:
We present an examination of the kinematics and stellar populations of
a sample of three brightest group galaxies (BGGs) and three brightest
cluster galaxies (BCGs) in X-ray groups and clusters. We have obtained
high signal-to-noise ratio Gemini/Gemini South Multi-Object
Spectrograph (GMOS) long-slit spectra of these galaxies and use Lick
indices to determine ages, metallicities and alpha-element abundance
ratios out to at least their effective radii. We find that the BGGs
and BCGs have very uniform masses, central ages and central
metallicities.
Description:
The BGG and BCG galaxy samples were selected from the Group Evolution
Multi-wavelength Study (GEMS; Osmond & Ponman, 2004MNRAS.350.1511O 2004MNRAS.350.1511O;
Forbes et al., 2006PASA...23...38F 2006PASA...23...38F) and the BCG sample presented in
Brough et al. (2005MNRAS.364.1354B 2005MNRAS.364.1354B). In both these samples the galaxy
is selected as the brightest galaxy closest to the X-ray centroid,
that is, closest to the centre of the potential well of these
structures.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 92 6 A summary of the properties of the sample of
galaxies
tablea.dat 277 6 Central aperture indices
tableb1.dat 156 182 Radial aperture indices, first part
tableb2.dat 155 182 *Radial aperture indices, second part
tablec.dat 70 182 Derived aperture data
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Note on tableb2.dat: the original table contained 2 records more,
with 2 results for NGC 3640(43.3) and NGC 5044(49.4);
those with the lower errors were kept here.
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See also:
J/AJ/130/55 : Modelled Lick indices for galaxies (Mendes+, 2005)
J/ApJS/160/176 : alpha-enhanced integrated Lick/IDS spectral index (Lee+, 2005)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Galaxy name (or abbreviation)
10- 31 A22 --- Galaxy Galaxy name
33- 41 A9 --- System Group (NGC) or cluster (Abell) name
43- 44 I2 h RAh Rigth ascension (J2000)
46- 47 I2 min RAm Rigth ascension (J2000)
49- 52 F4.1 s RAs Rigth ascension (J2000)
54 A1 --- DE- Declination sign (J2000)
55- 56 I2 deg DEd Declination (J2000)
58- 59 I2 arcmin DEm Declination (J2000)
61- 62 I2 arcsec DEs Declination (J2000)
64- 68 F5.1 Mpc Dist Luminosity distance to the galaxy
70- 75 F6.2 mag KMAG Absolute total K-magnitude from 2MASS
corrected for galactic extinction and
evolution as described in the text
77- 80 F4.2 mag e_KMAG rms uncertainty on KMAG
82 A1 --- l_logLX Limit flag on logLX
83- 87 F5.2 [10-7W] logLX System X-ray luminosity
89- 92 F4.2 [10-7W] e_logLX ? Assumed rms uncertainty on logLX
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Byte-by-byte Description of file: tablea.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Galaxy name (or abbreviation)
10- 15 F6.3 0.1nm HdelA HdeltaA index
17- 22 F6.3 0.1nm HdelF HdeltaF index
24- 28 F5.3 mag CN1 CN1 index
30- 34 F5.3 mag CN2 CN2 index
36- 40 F5.3 0.1nm Ca4227 Ca4227 index
42- 46 F5.3 0.1nm G4300 G4300 index
48- 53 F6.3 0.1nm HgamA HgammaA index
55- 60 F6.3 0.1nm HgamF HgammaF index
62- 66 F5.3 0.1nm Fe4383 Fe4383 index
68- 72 F5.3 0.1nm Ca4455 Ca4455 index
74- 78 F5.3 0.1nm Fe4531 Fe4531 index
80- 84 F5.3 0.1nm e_HdelA rms uncertainty on HdeltaA
86- 90 F5.3 0.1nm e_HdelF rms uncertainty on HdeltaF
92- 96 F5.3 mag e_CN1 rms uncertainty on CN1
98-102 F5.3 mag e_CN2 rms uncertainty on CN2
104-108 F5.3 0.1nm e_Ca4227 rms uncertainty on Ca4227
110-114 F5.3 0.1nm e_G4300 rms uncertainty on G4300
116-120 F5.3 0.1nm e_HgamA rms uncertainty on HgammaA
122-126 F5.3 0.1nm e_HgamF rms uncertainty on HgammaF
128-132 F5.3 0.1nm e_Fe4383 rms uncertainty on Fe4383
134-138 F5.3 0.1nm e_Ca4455 rms uncertainty on Ca4455
140-144 F5.3 0.1nm e_Fe4531 rms uncertainty on Fe4531
146-150 F5.3 0.1nm C4668 C4668 index
152-157 F6.3 0.1nm Hbeta Hbeta index
159-163 F5.3 0.1nm Fe5015 Fe5015 index
165-169 F5.3 mag Mg1 Mg1 index
171-175 F5.3 mag Mg2 Mg2 index
177-181 F5.3 0.1nm Mgb Mgb index
183-187 F5.3 0.1nm Fe5270 Fe5270 index
189-193 F5.3 0.1nm Fe5335 Fe5335 index
195-199 F5.3 0.1nm Fe5406 Fe5406 index
201-205 F5.3 0.1nm Fe5709 Fe5709 index
207-211 F5.3 0.1nm Fe5782 Fe5782 index
213-217 F5.3 0.1nm e_C4668 rms uncertainty on C4668
219-223 F5.3 0.1nm e_Hbeta rms uncertainty on Hbeta
225-229 F5.3 0.1nm e_Fe5015 rms uncertainty on Fe5015
231-235 F5.3 mag e_Mg1 rms uncertainty on Mg1
237-241 F5.3 mag e_Mg2 rms uncertainty on Mg2
243-247 F5.3 0.1nm e_Mgb rms uncertainty on Mgb
249-253 F5.3 0.1nm e_Fe5270 rms uncertainty on Fe5270
255-259 F5.3 0.1nm e_Fe5335 rms uncertainty on Fe5335
261-265 F5.3 0.1nm e_Fe5406 rms uncertainty on Fe5406
267-271 F5.3 0.1nm e_Fe5709 rms uncertainty on Fe5709
273-277 F5.3 0.1nm e_Fe5782 rms uncertainty on Fe5782
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Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Galaxy name (or abbreviation)
10- 15 F6.2 arcsec Rad [-50/50] Aperture radius
17- 22 F6.3 0.1nm HdelA HdeltaA index
24- 29 F6.3 0.1nm HdelF HdeltaF index
31- 36 F6.3 mag CN1 CN1 index
38- 43 F6.3 mag CN2 CN2 index
45- 50 F6.3 0.1nm Ca4227 Ca4227 index
52- 56 F5.3 0.1nm G4300 G4300 index
58- 63 F6.3 0.1nm HgamA HgammaA index
65- 70 F6.3 0.1nm HgamF HgammaF index
72- 76 F5.3 0.1nm Fe4383 Fe4383 index
78- 83 F6.3 0.1nm Ca4455 Ca4455 index
85- 90 F6.3 0.1nm Fe4531 Fe4531 index
92- 96 F5.3 0.1nm e_HdelA rms uncertainty on HdeltaA
98-102 F5.3 0.1nm e_HdelF rms uncertainty on HdeltaF
104-108 F5.3 mag e_CN1 rms uncertainty on CN1
110-114 F5.3 mag e_CN2 rms uncertainty on CN2
116-120 F5.3 0.1nm e_Ca4227 rms uncertainty on Ca4227
122-126 F5.3 0.1nm e_G4300 rms uncertainty on G4300
128-132 F5.3 0.1nm e_HgamA rms uncertainty on HgammaA
134-138 F5.3 0.1nm e_HgamF rms uncertainty on HgammaF
140-144 F5.3 0.1nm e_Fe4383 rms uncertainty on Fe4383
146-150 F5.3 0.1nm e_Ca4455 rms uncertainty on Ca4455
152-156 F5.3 0.1nm e_Fe4531 rms uncertainty on Fe4531
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Byte-by-byte Description of file: tableb2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Galaxy name (or abbreviation)
10- 15 F6.2 arcsec Rad [-50/50] Aperture radius
17- 21 F5.3 0.1nm C4668 C4668 index
23- 28 F6.3 0.1nm Hbeta Hbeta index
30- 35 F6.3 0.1nm Fe5015 Fe5015 index
37- 42 F6.3 mag Mg1 Mg1 index
44- 48 F5.3 mag Mg2 Mg2 index
50- 54 F5.3 0.1nm Mgb Mgb index
56- 61 F6.3 0.1nm Fe5270 Fe5270 index
63- 68 F6.3 0.1nm Fe5335 Fe5335 index
70- 75 F6.3 0.1nm Fe5406 Fe5406 index
77- 82 F6.3 0.1nm Fe5709 Fe5709 index
84- 89 F6.3 0.1nm Fe5782 Fe5782 index
91- 95 F5.3 0.1nm e_C4668 rms uncertainty on C4668
97-101 F5.3 0.1nm e_Hbeta rms uncertainty on Hbeta
103-107 F5.3 0.1nm e_Fe5015 rms uncertainty on Fe5015
109-113 F5.3 mag e_Mg1 rms uncertainty on Mg1
115-119 F5.3 mag e_Mg2 rms uncertainty on Mg2
121-125 F5.3 0.1nm e_Mgb rms uncertainty on Mgb
127-131 F5.3 0.1nm e_Fe5270 rms uncertainty on Fe5270
133-137 F5.3 0.1nm e_Fe5335 rms uncertainty on Fe5335
139-143 F5.3 0.1nm e_Fe5406 rms uncertainty on Fe5406
145-149 F5.3 0.1nm e_Fe5709 rms uncertainty on Fe5709
151-155 F5.3 0.1nm e_Fe5782 rms uncertainty on Fe5782
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Byte-by-byte Description of file: tablec.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Galaxy name (or abbreviation)
10- 15 F6.2 arcsec Rad [-50/50] Aperture radius
17- 21 I5 km/s RV Radial velocity
23- 24 I2 km/s e_RV rms uncertainty on RV
26- 28 I3 km/s sigma Velocity dispersion
30- 32 I3 km/s e_sigma rms uncertainty on sigma
34- 38 F5.3 [Gyr] logAge Age
40- 44 F5.3 [Gyr] e_logAge rms uncertainty on logAge
46- 51 F6.3 [-] [Z/H] Metallicity, [Z/H]
53- 57 F5.3 [-] e_[Z/H] rms uncertainty on [Z/H]
59- 64 F6.3 [-] [E/Fe] alpha-element enhancement, [E/Fe]
66- 70 F5.3 [-] e_[E/Fe] rms uncertainty on [E/Fe]
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Jul-2008