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J/A+A/407/423       Coma cluster early-type galaxies. III.    (Mehlert+, 2003)

Spatially resolved spectroscopy of Coma cluster early-type galaxies: III. The stellar population gradients. Mehlert D., Thomas D., Saglia R.P., Bender R., Wegner G. <Astron. Astrophys. 407, 423 (2003)> =2003A&A...407..423M
ADC_Keywords: Clusters, galaxy ; Spectroscopy Keywords: galaxies: clusters: individual: Coma - galaxies: elliptical and lenticular, cD - galaxies: stellar content Abstract: Based on Paper I of this series (Mehlert et al., 2000, Cat. J/A+AS/141/449), we derive central values and logarithmic gradients for the Hbeta, Mg and Fe indices of 35 early-type galaxies in the Coma cluster. We find that pure elliptical galaxies have on average slightly higher velocity dispersions, lower Hbeta, and higher metallic line-strengths than galaxies with disks (S0). Description: Table A1 (tablea1.dat) gives the central values (averaged over a<0.1ae, where ae is the distance along the major axis, along the major axis) of the indices Hβ, Mgb, Fe5270, Fe5335 and of the velocity dispersion sigma. Table A2 (tablea2.dat gives the fitted logarithmic gradients inside a<1ae along the major axis of the indices Hβ, Mgb, Fe5270, Fe5335 and the velocity dispersion sigma. Table A3 (tablea3.dat) gives the logarithmic fit value at 1ae along the major axis of the indices Hβ, Mgb, fe5270, Fe5335 and the velocity dispersion sigma. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file position.dat 48 35 Positions, from Simbad tablea1.dat 65 35 Central values of the line indices and sigma tablea2.dat 71 35 *Fitted Logarithmic gradients inside a<1ae of the line indices and sigma tablea3.dat 66 35 *Logarithmic fit values at 1ae of the line indices and sigma
Note on tablea2.dat, tablea3.dat: ae is he distance along the major axis.
See also: VII/42 : GMP catalogue: galaxies in the Coma cluster (Godwin+ 1983) J/A+AS/141/449 : Coma cluster early-type galaxies (Mehlert+, 2000) J/A+A/395/753 : Spectroscopy of Coma early-type galaxies. II. (Wegner+, 2002) Byte-by-byte Description of file: position.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Seq Mehlert et al. (2000, Cat. J/A+AS/141/449, table1) number 4- 6 A3 --- --- [GMP] 8- 11 I4 --- GMP GMP number (Cat. VII/42) 13 A1 --- --- [=] 15- 27 A13 --- Name Other name 30- 31 I2 h RAh Right ascension (J2000.0) 33- 34 I2 min RAm Right ascension (J2000.0) 36- 37 I2 s RAs Right ascension (J2000.0) 39 A1 --- DE- Declination sign (J2000.0) 40- 41 I2 deg DEd Declination (J2000.0) 43- 46 F4.1 arcmin DEm Declination (J2000.0)
Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Seq Mehlert et al. (2000, Cat. J/A+AS/141/449, table1) number 4- 7 I4 --- GMP GMP number (Cat. VII/42) 9- 12 A4 --- Type Morphological Type (from J/A+AS/141/449) 14- 17 F4.2 0.1nm Hbeta Central (<0.1ae) Hbeta absorption index (G1) 19- 22 F4.2 0.1nm e_Hbeta Error on Hbeta 24- 27 F4.2 0.1nm Mgb Central (<0.1ae) Mgb absorption index (G1) 29- 32 F4.2 0.1nm e_Mgb Error on Mgb 34- 37 F4.2 0.1nm Fe5270 Central (<0.1ae) Fe5270 absorption index (G1) 39- 42 F4.2 0.1nm e_Fe5270 Error on Fe5270 44- 47 F4.2 0.1nm Fe5335 Central (<0.1ae) Fe5335 absorption index (G1) 49- 52 F4.2 0.1nm e_Fe5335 Error on Fe5335 54- 58 F5.1 km/s sigma Central (<0.1ae) velocity dispersion (G1) 60- 62 F3.1 km/s e_sigma Error on sigma
Byte-by-byte Description of file: tablea2.dat
Bytes Format Units Label Explanations
1- 4 I4 --- GMP GMP number (Cat. VII/42) 6- 11 F6.3 --- DHbeta Gradient (inside 1ae) of Hbeta (G1) (1) 13- 17 F5.3 --- e_DHbeta Error on DHbeta (1) 19- 24 F6.3 --- DMgb Gradient (inside 1ae) of Mgb (G1) (1) 26- 30 F5.3 --- e_DMgb Error on DMgb (1) 32- 37 F6.3 --- DFe5270 Gradient (inside 1ae) of Fe5270 (G1) (1) 39- 43 F5.3 --- e_DFe5270 Error on DFe5270 (1) 45- 50 F6.3 --- DFe5335 Gradient (inside 1ae) of Fe5335 (G1) (1) 52- 56 F5.3 --- e_DFe5335 Error on DFe5335 (1) 58- 63 F6.3 --- Dsigma Gradient (inside 1ae) of velocity dispersion (G1) (1) 65- 69 F5.3 --- e_Dsigma Error on Dsigma (1)
Note (1): All values are in dex/dex units.
Byte-by-byte Description of file: tablea3.dat
Bytes Format Units Label Explanations
1- 4 I4 ----- GMP GMP number (Cat. VII/42) 6- 10 F5.3 [0.1nm] logHbeta(ae) Fit value of log(Hbeta) at 1ae (G1) 12- 16 F5.3 [0.1nm] e_logHbeta(ae) Error on logHbeta(ae) 18- 22 F5.3 [0.1nm] logMgb(ae) Fit value of log(Mgb) at 1ae (G1) 24- 28 F5.3 [0.1nm] e_logMgb(ae) Error on logMgb(ae) 30- 34 F5.3 [0.1nm] logFe5270(ae) Fit value of of log(Fe5270) at 1ae (G1) 36- 40 F5.3 [0.1nm] e_logFe5270(ae) Error on logFe5270(ae) 42- 46 F5.3 [0.1nm] logFe5335(ae) Fit value of log(Fe5335) at 1ae (G1) 48- 52 F5.3 [0.1nm] e_logFe5335(ae) Error on logFe5335(ae) 54- 58 F5.3 [km/s] logsigma(ae) Fit value of log(velocity dispersion) at 1ae (G1) 60- 64 F5.3 [km/s] e_logsigma(ae) Error on logsigma(ae)
Global notes: Note (G1): ae = re/sqrt(1-epsilon), is the distance along the major axis, that corresponds to the effective radius re of the galaxy with ellipticity epsilon.
Acknowledgements: Roberto Saglia
(End) Patricia Bauer [CDS] 22-Jul-2003
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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