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Query : 2007MNRAS.380..506G |
2007MNRAS.380..506G - Mon. Not. R. Astron. Soc., 380, 506-540 (2007/September-2)
Absorption-line strengths of 18 late-type spiral galaxies observed with SAURON.
GANDA K., PELETIER R.F., McDERMID R.M., FALCON-BARROSO J., DE ZEEUW P.T., BACON R., CAPPELLARI M., DAVIES R.L., EMSELLEM E., KRAJNOVIC D., KUNTSCHNER H., SARZI M. and VAN DE VEN G.
Abstract (from CDS):
We investigate the relations between the central line strength indices and their correlations with morphological type and central velocity dispersion, and compare the observed behaviour with that for ellipticals, lenticulars and early-type spirals from the SAURON survey. We find that our galaxies lie below the Mg-σ relation determined for elliptical galaxies and that the indices show a clear trend with morphological type.
From the line strength maps we calculate age, metallicity and abundance ratio maps via a comparison with model predictions; we discuss the results from a one-SSP (single stellar population) approach and from a two-SSP approach, considering the galaxy as a superposition of an old (~13 Gyr) and a younger (age ≤5 Gyr) population. We confirm that late-type galaxies are generally younger and more metal-poor than ellipticals and have abundance ratios closer to solar values. We also explore a continuous star formation scenario, and try to recover the star formation history using the evolutionary models of Bruzual & Charlot, assuming constant or exponentially declining star formation rate. In this last case, fixing the galaxy age to 10 Gyr, we find a correlation between the e-folding time-scale τ of the starburst and the central velocity dispersion, in the sense that more massive galaxies tend to have shorter τ, suggesting that the star formation happened long ago and has now basically ended, while for smaller objects with larger values of τ it is still active now.
Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS
Journal keyword(s): galaxies: bulges - galaxies: evolution - galaxies: formation - galaxies: kinematics and dynamics - galaxies: spiral - galaxies: structure
Simbad objects: 36
Number of rows : 36 |
N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2024 |
#notes |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | NGC 488 | GiG | 01 21 46.7967133224 | +05 15 24.623017524 | 15.0 | ~ | 290 | 0 | ||||
2 | M 74 | G | 01 36 41.7451236624 | +15 47 01.107512304 | 10.52 | 10.00 | 9.46 | 9.16 | ~ | 1736 | 1 | |
3 | NGC 770 | GiP | 01 59 13.6426514184 | +18 57 16.714843308 | 13.91 | 13.49 | ~ | 105 | 1 | |||
4 | NGC 772 | GiP | 01 59 19.5557148984 | +19 00 27.475677216 | 11.35 | 11.09 | 10.31 | 10.23 | 9.38 | ~ | 325 | 1 |
5 | NGC 864 | H2G | 02 15 27.641 | +06 00 09.43 | 12.00 | ~ | 220 | 1 | ||||
6 | NGC 1035 | EmG | 02 39 29.136 | -08 08 01.11 | 12.89 | 13.0 | 12.6 | ~ | 178 | 1 | ||
7 | NGC 1042 | EmG | 02 40 23.9724818544 | -08 26 00.736256616 | 11.47 | 11.56 | 11.02 | 11.7 | 11.4 | ~ | 260 | 1 |
8 | * rho02 Ari | LP* | 02 55 48.4979998 | +18 19 53.902936 | 8.56 | 7.44 | 5.93 | 3.51 | 1.34 | M6-III: | 224 | 0 |
9 | NGC 2805 | GiP | 09 20 20.3891233968 | +64 06 10.716485004 | 11.9 | ~ | 214 | 1 | ||||
10 | NGC 2814 | GiP | 09 21 11.525 | +64 15 11.73 | 14.0 | ~ | 82 | 0 | ||||
11 | IC 2458 | GiP | 09 21 30.1318400448 | +64 14 19.768079076 | 14.9 | ~ | 81 | 0 | ||||
12 | NGC 2820 | GiP | 09 21 45.564 | +64 15 28.87 | 13.1 | ~ | 162 | 0 | ||||
13 | NGC 2964 | GiP | 09 42 54.251 | +31 50 49.97 | 12.0 | ~ | 275 | 1 | ||||
14 | NGC 2968 | GiP | 09 43 12.0262452312 | +31 55 43.348902492 | 16.85 | 15.72 | 14.25 | 13.43 | 12.50 | ~ | 125 | 0 |
15 | NGC 3346 | EmG | 10 43 38.9309584368 | +14 52 18.437883960 | 12.80 | ~ | 183 | 0 | ||||
16 | NGC 3423 | AGN | 10 51 14.3245691976 | +05 50 24.158965920 | 12.1 | ~ | 176 | 0 | ||||
17 | NGC 3949 | GiG | 11 53 41.7311041896 | +47 51 31.401451476 | 10.9 | ~ | 335 | 1 | ||||
18 | NGC 4030 | GiP | 12 00 23.6102390784 | -01 06 00.197099136 | 11.42 | 10.3 | 10.4 | ~ | 340 | 1 | ||
19 | NGC 4102 | Sy2 | 12 06 23.0 | +52 42 40 | 11.8 | ~ | 422 | 1 | ||||
20 | M 99 | H2G | 12 18 49.625 | +14 24 59.36 | 10.45 | 10.44 | 9.87 | ~ | 919 | 2 | ||
21 | M 100 | AGN | 12 22 54.9299993592 | +15 49 20.296257960 | 10.04 | 10.05 | 9.35 | ~ | 1847 | 2 | ||
22 | NAME Virgo Cluster | ClG | 12 26 32.1 | +12 43 24 | ~ | 6645 | 0 | |||||
23 | NGC 4487 | EmG | 12 31 04.4731449720 | -08 03 14.548820040 | 11.7 | 11.9 | 11.6 | ~ | 176 | 0 | ||
24 | NGC 4504 | EmG | 12 32 17.4213303288 | -07 33 48.904197084 | 12.1 | 11.31 | 12.3 | ~ | 125 | 0 | ||
25 | NGC 4775 | EmG | 12 53 45.707 | -06 37 19.73 | 12.3 | 11.19 | 12.0 | ~ | 158 | 0 | ||
26 | V* SW Vir | AB* | 13 14 04.3830437280 | -02 48 25.130666916 | 9.24 | 8.52 | 6.85 | M7III: | 262 | 0 | ||
27 | NGC 5204 | LSB | 13 29 36.508 | +58 25 07.43 | 11.84 | 11.37 | ~ | 471 | 0 | |||
28 | UGC 8837 | AG? | 13 54 45.602 | +53 54 20.06 | 14.2 | ~ | 207 | 0 | ||||
29 | NAME M101 Group | GrG | 14 03 | +54.3 | ~ | 102 | 1 | |||||
30 | M 101 | GiP | 14 03 12.583 | +54 20 55.50 | 8.46 | 7.86 | 7.76 | ~ | 2914 | 2 | ||
31 | NGC 5474 | GiP | 14 05 01.608 | +53 39 43.95 | 11.28 | 10.79 | ~ | 443 | 1 | |||
32 | NGC 5477 | AG? | 14 05 33.318 | +54 27 37.85 | 13.94 | 14.36 | 14.01 | ~ | 209 | 1 | ||
33 | NGC 5585 | GiG | 14 19 48.204 | +56 43 44.58 | 11.73 | 11.216 | 11.12 | 10.123 | ~ | 430 | 0 | |
34 | NGC 5678 | AGN | 14 32 05.5700264952 | +57 55 17.155392060 | 12.10 | ~ | 227 | 1 | ||||
35 | NGC 5668 | AG? | 14 33 24.3419973936 | +04 27 01.650790800 | 12.7 | ~ | 217 | 0 | ||||
36 | NAME Ursa Major Cluster | ClG | 15 08.8 | +67 07 | ~ | 410 | 0 |
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