J/MNRAS/412/423 Stellar population trends in S0 galaxies (Chamberlain+, 2011)
Stellar population trends in S0 galaxies.
Chamberlain L.C.P., Courteau S., McDonald M., Rose J.A.
<Mon. Not. R. Astron. Soc., 412, 423-447 (2011)>
=2011MNRAS.412..423C 2011MNRAS.412..423C
ADC_Keywords: Galaxies, photometry ; Morphology ; Abundances
Keywords: galaxies: elliptical and lenticular, cD - galaxies: evolution -
galaxies: formation - galaxies: photometry
Abstract:
We present stellar population age and metallicity trends for a sample
of 59 S0 galaxies based on optical Sloan Digital Sky Survey (SDSS) and
near-infrared (NIR) J and H photometry. When combined with optical g
and r passband imaging data from the SDSS archive and stellar
population models, we obtain radial age and metallicity trends out to
at least five effective radii for most of the galaxies in our sample.
The sample covers a range in stellar mass and light concentration.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 46 59 Galaxy characteristics
table2.dat 39 70 UH 2.2-m observations
table3.dat 78 69 Derived radial quantities
table4.dat 45 59 Derived total quantities
table6.dat 27 59 Derived global properties
tablea1.dat 62 59 Age and metallicity gradients
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See also:
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Gal Galaxy name
10- 14 A5 --- MType Morphological type from the Uppsala General
Catalog (UGC) unless otherwise noted
15 A1 --- r_MType [m] m : Mtype for NED, else from UGC
17- 19 F3.1 arcmin a Major axis from NED
21- 23 F3.1 arcmin b Minor axis from NED
25- 29 I5 km/s RV Radial velocity from NED
31- 35 F5.1 Mpc Dist Distance, corrected for Virgo flow and the
Great Attractor, from NED
37- 41 F5.2 deg Incl Inclination, from UGC unless otherwise noted
42 A1 --- r_Incl [m] m: Incl from Hyperleda, else from UGC
44- 46 A3 --- Type [TBN] Galaxy type: Transition, Barred (from
Hyperleda) or Normal
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Gal Galaxy name
9 A1 --- Band [JH] Band in which was made the observation
11- 14 I4 s t.exp Total exposure time
16- 23 A8 --- Date Date (Month Year)
25- 30 F6.3 mag ZPmag Zero-point magnitude
32- 36 F5.3 mag sigma Standard deviation in the derived zero-points
for that field
38- 39 I2 --- NS Number of standard stars in the field
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1 A1 --- Band [HJ] Band in which parameters are derived
3- 10 A8 --- Gal Galaxy name
12- 14 I3 arcsec Cutoff Outer radial cut-off
16- 20 F5.2 Gyr Age.i Inner age
22- 25 F4.2 Gyr E_Age.i ?=- Error on Age.i (upper value)
27- 30 F4.2 Gyr e_Age.i ?=- Error on Age.i (lower value)
32- 36 F5.2 [-] [Z/H]i Inner [Z/H] (metallicity)
38- 41 F4.2 [-] E_[Z/H]i ?=- Error on [Z/H]i (upper value)
43- 46 F4.2 [-] e_[Z/H]i ?=- Error on [Z/H]i (lower value)
48- 52 F5.2 Gyr Age.o Outer age
54- 57 F4.2 Gyr E_Age.o ?=- Error on Age.o (upper value)
59- 62 F4.2 Gyr e_Age.o ?=- Error on Age.o (lower value)
64- 68 F5.2 [-] [Z/H]o Outer [Z/H] (metallicity)
70- 73 F4.2 [-] E_[Z/H]o ?=- Error on [Z/H]o (upper value)
75- 78 F4.2 [-] e_[Z/H]o ?=- Error on [Z/H]o (upper value)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Gal Galaxy name
10- 13 F4.1 mag rtot Total r magnitude
15- 18 F4.1 mag gtot Total g magnitude
20- 23 F4.1 mag Htot ?=- Total H magnitude
25- 28 F4.1 mag Jtot ?=- Total J magnitude
30- 33 F4.1 arcsec Re Effective radius
35- 37 F3.1 mag g-rtot Total g-r colour index
39- 41 F3.1 mag r-Htot ?=- Total r-H colour index
43- 45 F3.1 mag r-Jtot ?=- Total r-J colour index
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Gal Galaxy name
10- 12 F3.1 --- C Concentration index
14- 21 E8.3 Msun Mass Mass of galaxy
23- 27 F5.2 [Mpc-3] Dens Local density (log scale)
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1 A1 --- Band [HJ] Band in which parameters are derived
3- 10 A8 --- Gal Galaxy name
12- 12 A1 --- l_DA/Dr [>] Limit flag on DA/Dr (1)
14- 20 F7.4 --- DA/Dr ?=- Age gradient, ΔAge/Δlog(r) (2)
22- 28 F7.4 --- e_DA/Dr ?=- rms uncertainty on DA/Dr
30- 30 A1 --- l_DZ/Dr [>] Limit flag on DZ/Dr (1)
32- 38 F7.4 --- DZ/Dr ?=- Metallicity gradient,
Δ[Z/H]/Δlog(r) (2)
40- 45 F6.4 --- e_DZ/Dr ?=- rms uncertainty on DZ/Dr
47- 47 A1 --- l_DZ/Dkpc [>] Limit flag on DZ/Dr2 (1)
49- 55 F7.4 --- DZ/Dkpc ?=- Metallicity gradient,
Δ[Z/H]/Δ(rkpc)
57- 62 F6.4 --- e_DZ/Dkpc ?=- rms uncertainty on DZ/Dr2
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Note (1): Because the extracted ages and metallicities were set to
a maximum of 13.7Gyr and +0.5dex respectively, when an age or
metallicity from a bin used to calculate the gradients was set to
one these values, the gradient is considered a lower limit; the
'>' symbol should be interpreted as "≥".
Note (2): radius is expressed either as r/Re (unitless), or in kpc.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 20-Sep-2011