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Query : 2000MNRAS.313..800D |
2000MNRAS.313..800D - Mon. Not. R. Astron. Soc., 313, 800-814 (2000/April-3)
Tracing the vertical composition of disc galaxies through colour gradients.
DE GRIJS R. and PELETIER R.F.
Abstract (from CDS):
It appears that the intrinsic vertical colour gradients are either non-existent, or small and relatively constant as a function of position along the major axes of the galaxies. On average, the earlier-type galaxies exhibit smaller vertical (B-I) gradients than the later types; our results are consistent with the absence of any vertical colour gradient in the discs of the early-type sample galaxies. In most galaxies small-scale variations in the magnitude and even the direction of the vertical gradient are observed: at larger galactocentric distances they generally display redder colours with increasing z height, whereas the opposite is often observed in and near the galactic centres.
For a significant fraction of our sample galaxies another mechanism in addition to the effects of stellar population gradients is required to explain the magnitude of the observed gradients. The non-zero colour gradients in a significant fraction of our sample galaxies are likely to be (at least) partially due to residual dust extinction at these z heights, as is also evidenced from the sometimes significant differences between the vertical colour gradients measured on either side of the galactic planes.
We suggest that initial vertical metallicity gradients, if any, have probably not been accentuated by accretion or merging events over the lifetimes of our sample galaxies. On the other hand, they may have weakened any existing vertical metallicity gradients, although they also may have left the existing correlations unchanged.
Abstract Copyright: 2000, Royal Astronomical Society
Journal keyword(s): galaxies: abundances - galaxies: fundamental parameters - galaxies: photometry - galaxies: spiral - galaxies: statistics
Simbad objects: 47
Number of rows : 47 |
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 891 | H2G | 02 22 32.907 | +42 20 53.95 | 11.08 | 10.81 | 9.93 | 7.86 | ~ | 1669 | 2 | |
2 | ESO 416-25 | GiC | 02 48 40.805 | -31 32 10.62 | 14.68 | 13.30 | 13.7 | ~ | 67 | 0 | ||
3 | IC 1963 | GiG | 03 35 31.0692175536 | -34 26 49.368859656 | 12.90 | 11.71 | ~ | 135 | 0 | |||
4 | NGC 1381 | GiP | 03 36 31.6592184144 | -35 17 42.739221912 | 12.90 | 12.47 | 11.50 | 11.02 | ~ | 254 | 1 | |
5 | ESO 201-22 | AG? | 04 08 59.922 | -48 43 37.49 | 14.73 | 14.3 | 13.8 | ~ | 56 | 0 | ||
6 | IC 2058 | EmG | 04 17 54.3720552624 | -55 55 57.738342360 | 13.90 | 12.94 | 13.2 | ~ | 92 | 2 | ||
7 | ESO 202-35 | AG? | 04 32 16.4374770384 | -49 40 32.866998276 | 13.38 | 12.31 | 13.0 | ~ | 65 | 0 | ||
8 | NGC 1886 | Sy2 | 05 21 48.1563158664 | -23 48 36.315007812 | 13.62 | 12.28 | ~ | 78 | 0 | |||
9 | NAME LMC | G | 05 23 34.6 | -69 45 22 | 0.4 | ~ | 17459 | 0 | ||||
10 | ESO 33-22 | EmG | 05 31 41.294 | -73 45 05.14 | 15.56 | 14.71 | 14.7 | ~ | 40 | 1 | ||
11 | ESO 555-36 | Sy2 | 06 07 41.799 | -19 54 43.98 | 15.60 | 13.98 | ~ | 34 | 0 | |||
12 | ESO 311-12 | AG? | 07 47 34.050 | -41 27 07.71 | 12.83 | 11.14 | ~ | 42 | 0 | |||
13 | ESO 564-27 | Sy2 | 09 11 54.664 | -20 07 00.82 | 14.39 | 13.03 | 13.0 | ~ | 65 | 0 | ||
14 | ESO 435-14 | EmG | 09 57 48.417 | -28 30 23.57 | 14.44 | 13.06 | 13.7 | ~ | 63 | 1 | ||
15 | IC 2531 | EmG | 09 59 55.6140265128 | -29 37 04.575809208 | 13.19 | 11.54 | 12.1 | ~ | 143 | 1 | ||
16 | ESO 435-50 | AG? | 10 10 50.50 | -30 25 26.0 | 15.94 | 14.94 | ~ | 39 | 0 | |||
17 | ESO 263-15 | AG? | 10 12 19.856 | -47 17 41.51 | 14.42 | 12.87 | 13.4 | ~ | 47 | 0 | ||
18 | ESO 263-18 | Sy2 | 10 13 30.465 | -43 43 01.07 | 14.82 | 13.31 | ~ | 27 | 0 | |||
19 | NGC 3203 | GiG | 10 19 33.8163340224 | -26 41 55.783685292 | 13.22 | 11.65 | ~ | 65 | 0 | |||
20 | NGC 3390 | LIN | 10 48 04.343 | -31 32 00.04 | 13.24 | 13.41 | 11.43 | ~ | 87 | 0 | ||
21 | ESO 377-7 | AG? | 11 06 27.3179 | -36 41 54.336 | 15.93 | 14.60 | ~ | 14 | 0 | |||
22 | ESO 321-10 | Sy1 | 12 11 42.089 | -38 32 54.82 | 14.26 | 12.39 | ~ | 63 | 0 | |||
23 | ESO 506-2 | Sy2 | 12 20 10.1608836912 | -26 04 00.152684508 | 14.60 | 13.15 | ~ | 50 | 0 | |||
24 | NGC 4565 | LIN | 12 36 20.804 | +25 59 14.61 | 13.61 | 12.43 | ~ | 958 | 0 | |||
25 | NGC 4672 | Sy2 | 12 46 15.7249021968 | -41 42 21.407260572 | 14.12 | 14.25 | 12.60 | 12.9 | ~ | 75 | 0 | |
26 | ESO 322-87 | GiG | 12 48 02.6698910352 | -40 49 07.390787916 | 14.68 | 13.31 | ~ | 48 | 0 | |||
27 | ESO 269-15 | EmG | 12 57 13.154 | -46 22 28.79 | 14.07 | 13.7 | 13.5 | ~ | 56 | 0 | ||
28 | ESO 575-61 | AG? | 13 08 15.60 | -21 00 08.0 | 16.11 | 14.83 | ~ | 43 | 0 | |||
29 | ESO 444-21 | EmG | 13 23 30.645 | -30 06 51.31 | 15.60 | 14.81 | 15.33 | ~ | 57 | 0 | ||
30 | ESO 509-19 | EmG | 13 27 56.3718046296 | -25 51 22.461435936 | 14.97 | 13.48 | 13.58 | ~ | 46 | 0 | ||
31 | ESO 383-5 | EmG | 13 29 23.551 | -34 16 16.82 | 14.25 | 12.82 | 12.9 | ~ | 58 | 0 | ||
32 | ESO 446-18 | Sy2 | 14 08 38.287 | -29 34 19.34 | 14.91 | 13.48 | 14.87 | ~ | 63 | 0 | ||
33 | IC 4393 | Sy2 | 14 17 48.951 | -31 20 57.12 | 14.59 | 13.20 | 13.5 | ~ | 71 | 0 | ||
34 | IC 4484 | AG? | 14 47 43.894 | -73 18 21.46 | 14.23 | 14.39 | 13.3 | ~ | 41 | 0 | ||
35 | NGC 5906 | GiG | 15 15 53.687 | +56 19 43.86 | 11.4 | ~ | 770 | 1 | ||||
36 | IC 4819 | AG? | 19 07 07.30 | -59 28 01.0 | 14.15 | 13.21 | 13.6 | ~ | 34 | 0 | ||
37 | IC 4871 | EmG | 19 35 42.224 | -57 31 09.30 | 14.03 | 12.73 | 13.2 | ~ | 66 | 0 | ||
38 | ESO 460-31 | EmG | 19 44 21.5359366440 | -27 24 24.849832680 | 15.15 | 13.9 | 13.6 | ~ | 58 | 0 | ||
39 | ESO 340-8 | Sy2 | 20 17 11.8389133440 | -40 55 25.314812724 | 15.45 | 14.50 | 14.8 | ~ | 50 | 0 | ||
40 | ESO 340-9 | EmG | 20 17 20.515 | -38 40 25.24 | 14.52 | 14.4 | 14.3 | ~ | 55 | 0 | ||
41 | IC 5026 | AG? | 20 48 28.0612119312 | -78 04 09.170029920 | 15.48 | 14.12 | 14.5 | ~ | 52 | 0 | ||
42 | IC 5052 | G | 20 52 01.633 | -69 11 35.93 | 12.83 | 12.20 | 11.66 | 11.40 | ~ | 154 | 0 | |
43 | ESO 286-18 | GiP | 20 57 50.3434558560 | -43 22 28.058494764 | 14.30 | 12.77 | 13.2 | ~ | 51 | 0 | ||
44 | ESO 235-53 | GiG | 21 05 10.210 | -47 47 22.75 | 14.53 | 12.68 | ~ | 30 | 0 | |||
45 | ESO 531-22 | EmG | 21 40 29.480 | -26 31 40.68 | 13.92 | 13.7 | 13.3 | ~ | 63 | 0 | ||
46 | ESO 288-25 | Sy2 | 21 59 17.8140093336 | -43 52 01.109469720 | 13.97 | 12.67 | ~ | 53 | 0 | |||
47 | ESO 240-11 | EmG | 23 37 49.4188489776 | -47 43 38.430144948 | 13.05 | 11.69 | 12.3 | ~ | 113 | 1 |
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