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J/A+A/395/431  Line-strength indices for 148 early-type galaxies (Beuing+, 2002)

Line-strength indices and velocity dispersions for 148 early-type galaxies in different environments Beuing J., Bender R., Mendes de Oliveira C., Thomas D., Maraston C. <Astron. Astrophys. 395, 431 (2002)> =2002A&A...395..431B
ADC_Keywords: Galaxies, spectra ; Line Profiles ; Velocity dispersion Keywords: galaxies: elliptical - galaxies: abundances - galaxies: stellar content - galaxies: velocity dispersions Abstract: We have derived high quality line-strength indices and velocity dispersions for a sample of 148 early-type galaxies in different environments. The wavelength region covered by the observations (lambda∼4600 to 6600Å) includes the Lick/IDS indices Hbeta, Mg1, Mg2, Mgb, Fe5015, Fe5270, Fe5335, Fe5406, Fe5709, Fe5782, NaD, TiO1 and TiO2. The data are intended to address possible differences of the stellar populations of early-type galaxies in low- and high-density environments. This paper describes the sample properties, explains the data reduction and presents the complete list of all the measurements. Most galaxies of the sample (85%) had no previous measurements of any Lick/IDS indices and for 30% of the galaxies we present first-time determinations of their velocity dispersions. Special care is taken to identify galaxies with emission lines. We found that 62 per cent of the galaxies in the sample have emission lines, as measured by the equivalent width of the [0III]5007Å line, EW[OIII]~≳0.3Å. Description: In tables 5 and 6 we list the derived and accompanying properties of the sample galaxies and the line-strength indices for all galaxies, respectively. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table5.dat 76 148 Derived accompanying properties table6.dat 187 148 Central line-strength indices
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Object identification 11 A1 --- f_sigma0 [*] Low central velocity dispersion (3) 14- 20 F7.1 km/s HRV Heliocentric radial velocity (1) 23- 27 F5.1 km/s sigma0 Central velocity dispersion (2) 30- 33 F4.1 km/s e_sigma0 1-sigma error in sigma0 (3) 36 I1 --- EType [0/2] Emission-type (4) 39- 42 F4.1 arcsec-2 NGT ? Local surface density of galaxies 45- 48 F4.1 --- MType ? Galaxy type (5) 51- 55 F5.2 mag BT0 Total extinction corrected B-magnitudes 58- 61 A4 --- r_BT0 Source for BT0 (6) 64- 68 F5.2 arcsec Reff ? Effective radius (R-band, unpublished) 71- 73 I3 deg PA ? Position angle (7) 76 I1 --- Run Run number
Note (1): Typical 1-sigma error on HRV is 20km/s. Note (2): Measured within 1/10 of the effective radius. Note (3): e_sigma0 is either the standard deviation from the mean value over the different template-stars or the mean FCQ error estimate, whichever is larger. The galaxies marked with an asterisk have central velocity dispersions below 100km/s. For these galaxies, the errors quoted are formal errors which may be systematically too small, given that the measurements are below the resolution of the data. Note (4): Emission type: 0: No emission visible in the spectra, or EW[OIII]<0.2 1: Possible/weak emission, 0.2<EW[OIII]<0.5 2: Strong emission, or EW[OIII]>0.5 Note (5): Galaxy types: ]-5.5, -4.5]: E ]-4.5, -3.5]: cD ]-3.5, -2.5]: E/S0 ]-2.5, -1.5]: S0 >-1.5: later than S0 Note (6): Source for BT0: dV91: de Vaucouleurs et al. (RC3, 1991, Cat. VII/155) F89: Faber et al. (1989ApJS...69..763F, Cat. VII/176) LV89: Lauberts & Valentijn (1989, Cat. VII/115) Note (7): Position angles (in degrees, from north to east) of the slits corresponding to the major axis of the galaxies. For the galaxies of Run 1 (see col. 12) no value is given -- in these cases the galaxies were observed along the default east-west slit position.
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Object identification 13- 17 F5.2 0.1nm Hbeta Central line-strength Lick index (1) 20- 23 F4.2 0.1nm e_Hbeta 1-sigma error in Hbeta 26- 30 F5.2 0.1nm Fe5015 Central line-strength Lick index (1) 33- 36 F4.2 0.1nm e_Fe5015 1-sigma error in Fe5015 39- 44 F6.3 mag Mg1 Central line-strength Lick index (1) 47- 51 F5.3 mag e_Mg1 1-sigma error in Mg_1 54- 59 F6.3 mag Mg2 Central line-strength Lick index (1) 62- 66 F5.3 mag e_Mg2 1-sigma error in Mg_2 69- 73 F5.2 0.1nm Mgb Central line-strength Lick index (1) 76- 79 F4.2 0.1nm e_Mgb 1-sigma error in Mgb 82- 86 F5.2 0.1nm Fe5270 Central line-strength Lick index (1) 89- 92 F4.2 0.1nm e_Fe5270 1-sigma error in Fe5270 95- 99 F5.2 0.1nm Fe5335 Central line-strength Lick index (1) 102-105 F4.2 0.1nm e_Fe5335 1-sigma error in Fe5335 108-112 F5.2 0.1nm Fe5406 Central line-strength Lick index (1) 115-118 F4.2 0.1nm e_Fe5406 1-sigma error in Fe5406 121-125 F5.2 0.1nm Fe5709 Central line-strength Lick index (1) 128-131 F4.2 0.1nm e_Fe5709 1-sigma error in Fe5709 134-138 F5.2 0.1nm Fe5782 Central line-strength Lick index (1) 141-144 F4.2 0.1nm e_Fe5782 1-sigma error in Fe5782 147-151 F5.2 0.1nm NaD Central line-strength Lick index (1) 154-157 F4.2 0.1nm e_NaD 1-sigma error in NaD 160-165 F6.3 mag TiO1 Central line-strength Lick index (1) 168-172 F5.3 mag e_TiO1 1-sigma error in TiO_1 175-180 F6.3 mag TiO2 ? Central line-strength Lick index (1) 183-187 F5.3 mag e_TiO2 ? 1-sigma error in TiO_2
Note (1): Line-strength indices measured within 1/10 of the effective radius.
Acknowledgements: Daniel Thomas
(End) Daniel Thomas [MPE, Garching] 19-Nov-2002
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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