J/A+A/474/1081 Stellar population gradients in bulges. I (Gorgas+, 2007)
Stellar population gradients in bulges along the Hubble sequence. I. The data.
Gorgas J., Jablonka P., Goudfrooij P.
<Astron. Astrophys., 474, 1081-1092 (2007)>
=2007A&A...474.1081G 2007A&A...474.1081G
ADC_Keywords: Galaxies, nearby ; Galaxies, optical ; Galaxies, spectra
Keywords: galaxies: bulges - galaxies: stellar content -
methods: data analysis - galaxies: abundances - galaxies: evolution -
galaxies: formation
Abstract:
This is the first paper presenting our long-term project aimed at
studying the nature of bulges through analyzing their stellar
population gradients. We present deep spectroscopic observations along
the minor axis and the data reduction for a sample of 32 bulges of
edge-on spiral galaxies. We explain in detail our procedures for
measuring their dynamical parameters (rotation curves and velocity
dispersion profiles) and line-strength indices, including the
conversion to the Lick/IDS system. Tables giving the values of the
dynamical parameters and line-strength indices at each galactocentric
radius are presented (in electronic form) for each galaxy of the
sample. The derived line-strength gradients from this dataset will be
analyzed in a forthcoming paper to set constraints on the different
scenarios for the formation of the bulges.
Description:
In the first dataset we list Lick/IDS line-strength indices along the
galaxy radii measured in flux-calibrated spectra and at the natural
resolution of the bulges (i.e. internal plus instrumental). In the
second dataset we list all the indices converted to the Lick/IDS
system, together with the dynamical parameters (radial velocity and
velocity dispersions) at each galactocentric radius.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 87 32 Galaxy sample
data1.dat 424 983 Line-strength indices in flux-calibrated spectra,
not transformed to the Lick/IDS system
data2.dat 480 960 Dynamical parameters and indices transformed to
the Lick/IDS system
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See also:
J/A+A/474/763 : Stellar population gradients in bulges. II. (Jablonka+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Galaxy Galaxy name
14- 18 A5 --- MType Morphological type
20- 23 F4.1 --- TType Hubble T type (1)
25- 29 F5.2 mag Btmag Total apparent B magnitude (1)
31- 32 I2 deg i Galaxy inclination (1)
34- 45 A12 --- Bulge Bulge type, from Lutticke et al. (2000,
Cat. J/A+AS/145/405)
47- 57 A11 --- Env Environment
59- 61 A3 --- Run Run number(s) in which each galaxy was observed
63- 65 I3 deg PA Position angle along the slit
67- 71 I5 s ExpTime Total exposure time
73- 76 F4.1 arcsec reff Effective radius of the bulge, computed as
explained in Sect. 4
78- 81 F4.1 arcsec e_reff rms uncertainty on reff
83- 87 F5.1 km/s Vmax ? Maximum rotational velocity along the disk
major axis, corrected from inclination
when necessary (1)
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Note (1): Data have been taken from HyperLeda (http://leda.univ-lyon1.fr/)
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Byte-by-byte Description of file: data1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- Galaxy Galaxy Name
12- 17 I6 km/s Sigma0 Velocity dispersion of the spectra (1)
18- 24 F7.1 arcsec Rad [-116/62] Distance to the galaxy center
25- 32 F8.3 0.1nm HdA ? HdeltaA index value
33- 40 F8.3 0.1nm e_HdA ? Uncertainty of HdeltaA index value
41- 48 F8.3 0.1nm HdF ? HdeltaF index value
49- 56 F8.3 0.1nm e_HdF ? Uncertainty of HdeltaF index value
57- 64 F8.3 mag CN1 ? CN1 index value
65- 72 F8.3 mag e_CN1 ? Uncertainty of CN1 index value
73- 80 F8.3 mag CN2 ? CN2 index value
81- 88 F8.3 mag e_CN2 ? Uncertainty of CN2 index value
89- 96 F8.3 0.1nm Ca4227 ? Ca4227 index value
97-104 F8.3 0.1nm e_Ca4227 ? Uncertainty of Ca4227 index value
105-112 F8.3 0.1nm G4300 ? G4300 index value
113-120 F8.3 0.1nm e_G4300 ? Uncertainty of G4300 index value
121-128 F8.3 0.1nm HgA ? HGammaA index value
129-136 F8.3 0.1nm e_HgA ? Uncertainty of HGammaA index value
137-144 F8.3 0.1nm HgF ? HgammaF index value
145-152 F8.3 0.1nm e_HgF ? Uncertainty of HgammaF index value
153-160 F8.3 0.1nm Fe4383 ? Fe4383 index value
161-168 F8.3 0.1nm e_Fe4383 ? Uncertainty of Fe4383 index value
169-176 F8.3 0.1nm Ca4455 ? Ca4455 index value
177-184 F8.3 0.1nm e_Ca4455 ? Uncertainty of Ca4455 index value
185-192 F8.3 0.1nm Fe4531 ? Fe4531 index value
193-200 F8.3 0.1nm e_Fe4531 ? Uncertainty of Fe4531 index value
201-208 F8.3 0.1nm C4668 ? C4668 index value
209-216 F8.3 0.1nm e_C4668 ? Uncertainty of C4668 index value
217-224 F8.3 0.1nm HB4861 ? HB4861 index value
225-232 F8.3 0.1nm e_HB4861 ? Uncertainty of HB4861 index value
233-240 F8.3 0.1nm Fe5015 ? Fe5015 index value
241-248 F8.3 0.1nm e_Fe5015 ? Uncertainty of Fe5015 index value
249-256 F8.3 mag Mg1 ? Mg1 index value
257-264 F8.3 mag e_Mg1 ? Uncertainty of Mg1 index value
265-272 F8.3 mag Mg2 ? Mg2 index value
273-280 F8.3 mag e_Mg2 ? Uncertainty of Mg2 index value
281-288 F8.3 0.1nm Mgb ? Mgb index value
289-296 F8.3 0.1nm e_Mgb ? Uncertainty of Mgb index value
297-304 F8.3 0.1nm Fe5270 ? Fe5270 index value
305-312 F8.3 0.1nm e_Fe5270 ? Uncertainty of Fe5270 index value
313-320 F8.3 0.1nm Fe5335 ? Fe5335 index value
321-328 F8.3 0.1nm e_Fe5335 ? Uncertainty of Fe5335 index value
329-336 F8.3 0.1nm Fe5406 ? Fe5406 index value
337-344 F8.3 0.1nm e_Fe5406 ? Uncertainty of Fe5406 index value
345-352 F8.3 0.1nm Fe5709 ? Fe5709 index value
353-360 F8.3 0.1nm e_Fe5709 ? Uncertainty of Fe5709 index value
361-368 F8.3 0.1nm Fe5782 ? Fe5782 index value
369-376 F8.3 0.1nm e_Fe5782 ? Uncertainty of Fe5782 index value
377-384 F8.3 0.1nm Na5895 ? Na5895 index value
385-392 F8.3 0.1nm e_Na5895 ? Uncertainty of Na5895 index value
393-400 F8.3 mag TiO1 ? TiO1 index value
401-408 F8.3 mag e_TiO1 ? Uncertainty of TiO1 index value
409-416 F8.3 mag TiO2 ? TiO2 index value
417-424 F8.3 mag e_TiO2 ? Uncertainty of TiO2 index value
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Note (1): This indicates the velocity dispersion at which the indices have been
measured
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Byte-by-byte Description of file: data2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Galaxy Galaxy Name
12- 17 F6.1 arcsec Rad [-62/62] Distance to the galaxy center
18- 25 F8.3 --- Gamma ? Relative line-strength parameter
26- 33 F8.3 --- e_Gamma ? Uncertainty on relative line-strength
34- 42 F9.1 km/s RV ? Radial velocity
43- 49 F7.1 km/s e_RV ? Uncertainty of radial velocity
50- 57 F8.1 km/s Sigma ? Velocity dispersion
58- 64 F7.1 km/s e_Sigma ? Uncertainty of velocity dispersion
65- 72 F8.3 0.1nm HdA ? HdeltaA index value
73- 80 F8.3 0.1nm e_HdA ? Uncertainty of HdeltaA index value
81- 88 F8.3 0.1nm HdF ? HdeltaF index value
89- 96 F8.3 0.1nm e_HdF ? Uncertainty of HdeltaF index value
97-104 F8.3 mag CN1 ? CN1 index value
105-112 F8.3 mag e_CN1 ? Uncertainty of CN1 index value
113-120 F8.3 mag CN2 ? CN2 index value
121-128 F8.3 mag e_CN2 ? Uncertainty of CN2 index value
129-136 F8.3 0.1nm Ca4227 ? Ca4227 index value
137-144 F8.3 0.1nm e_Ca4227 ? Uncertainty of Ca4227 index value
145-152 F8.3 0.1nm G4300 ? G4300 index value
153-160 F8.3 0.1nm e_G4300 ? Uncertainty of G4300 index value
161-168 F8.3 0.1nm HgA ? HGammaA index value
169-176 F8.3 0.1nm e_HgA ? Uncertainty of HGammaA index value
177-184 F8.3 0.1nm HgF ? HgammaF index value
185-192 F8.3 0.1nm e_HgF ? Uncertainty of HgammaF index value
193-200 F8.3 0.1nm Fe4383 ? Fe4383 index value
201-208 F8.3 0.1nm e_Fe4383 ? Uncertainty of Fe4383 index value
209-216 F8.3 0.1nm Ca4455 ? Ca4455 index value
217-224 F8.3 0.1nm e_Ca4455 ? Uncertainty of Ca4455 index value
225-232 F8.3 0.1nm Fe4531 ? Fe4531 index value
233-240 F8.3 0.1nm e_Fe4531 ? Uncertainty of Fe4531 index value
241-248 F8.3 0.1nm C4668 ? C4668 index value
249-256 F8.3 0.1nm e_C4668 ? Uncertainty of C4668 index value
257-264 F8.3 0.1nm HB4861 ? HB4861 index value
265-272 F8.3 0.1nm e_HB4861 ? Uncertainty of HB4861 index value
273-280 F8.3 0.1nm Fe5015 ? Fe5015 index value
281-288 F8.3 0.1nm e_Fe5015 ? Uncertainty of Fe5015 index value
289-296 F8.3 mag Mg1 ? Mg1 index value
297-304 F8.3 mag e_Mg1 ? Uncertainty of Mg1 index value
305-312 F8.3 mag Mg2 ? Mg2 index value
313-320 F8.3 mag e_Mg2 ? Uncertainty of Mg2 index value
321-328 F8.3 0.1nm Mgb ? Mgb index value
329-336 F8.3 0.1nm e_Mgb ? Uncertainty of Mgb index value
337-344 F8.3 0.1nm Fe5270 ? Fe5270 index value
345-352 F8.3 0.1nm e_Fe5270 ? Uncertainty of Fe5270 index value
353-360 F8.3 0.1nm Fe5335 ? Fe5335 index value
361-368 F8.3 0.1nm e_Fe5335 ? Uncertainty of Fe5335 index value
369-376 F8.3 0.1nm Fe5406 ? Fe5406 index value
377-384 F8.3 0.1nm e_Fe5406 ? Uncertainty of Fe5406 index value
385-392 F8.3 0.1nm Fe5709 ? Fe5709 index value
393-400 F8.3 0.1nm e_Fe5709 ? Uncertainty of Fe5709 index value
401-408 F8.3 0.1nm Fe5782 ? Fe5782 index value
409-416 F8.3 0.1nm e_Fe5782 ? Uncertainty of Fe5782 index value
417-424 F8.3 0.1nm Na5895 ? Na5895 index value
425-432 F8.3 0.1nm e_Na5895 ? Uncertainty of Na5895 index value
433-440 F8.3 mag TiO1 ? TiO1 index value
441-448 F8.3 mag e_TiO1 ? Uncertainty of TiO1 index value
449-456 F8.3 mag TiO2 ? TiO2 index value
457-464 F8.3 mag e_TiO2 ? Uncertainty of TiO2 index value
465-472 F8.3 0.1nm EW[OIII] ? OIII 5007 equivalent width
473-480 F8.3 0.1nm e_EW[OIII] ? Uncertainty of [OIII] 5007 equivalent width
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Acknowledgements:
Javier Gorgas, jgorgas(at)fis.ucm.es
(End) J. Gorgas [Univ. Complutense Madrid], P. Vannier [CDS] 28-Mar-2008