1999A&AS..137..245M


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.19CEST14:10:09

1999A&AS..137..245M - Astron. Astrophys., Suppl. Ser., 137, 245-268 (1999/June-1)

Colour distributions in E-S0 galaxies. IV. Colour data and dust in E's from Nieto's B, R frames.

MICHARD R.

Abstract (from CDS):

The B-R colours distributions (with R in Cousins's system) have been measured in 44 E classified galaxies in the Local Supercluster, from pairs of frames collected by Nieto and co-workers in 1989-91. These are nearly all from the CFHT, and of sub-arsec resolution. Great attention has been given to the effects of unequal PSF's in the B and R frames upon colour distributions near centre; such effects are illustrated from model calculations and from pseudo-colours obtained from pairs of frames taken in the same band but with different seeing conditions. Appropriate corrections were systematically applied in order to derive central colours and inner gradients, although still affected by the limited resolution of the frames. The radial colour distributions have been measured in more detail than usual, considering separately the near major axis and near minor axis regions of the isophotal contours. Azimuthal colour distributions, in rings limited by selected isophotes, were also obtained. Dust ``patterns", i.e. patches, lanes, arcs, ..., have been detected and mapped from the colour distributions. An ad hoc dust pattern importance index (or DPII) in a scale of 0 to 3, has been introduced to qualify their size and contrast. We have tried to find evidence of a diffuse dust concentration towards the disk, if one is apparent. Positive results (noted by the dd symbol) have been obtained for disky E's, whenever the inclination of their disk to the line of sight is large enough, and eventually also in the small isolated disks sometimes present in both boxy and disky galaxies. The red central peak occurring in many E-galaxies might be the signature of a central concentration of dust, also in cases where this peak is isolated rather than embedded in some extensive colour pattern. The properties of the near centre colour profiles have been related to a classification of nuclear photometric profiles into ``flat topped" and ``sharply peaked" (equivalent to ``core-like" and ``power-law" in the terminology of Faber et al., 1997). The published here data include the following: . Short descriptions and codes for the characters of the B-R distribution of each object, and comparison to the results of recent surveys. . A table of the mean B-R at the centre and at two selected isophotes, a ``core colour gradient" and the usual logarithmic gradient. . Maps of near core B-R isochromes and B isophotes for comparison. Images of the B-R colour distribution are made available in electronic form.

Abstract Copyright:

Journal keyword(s): galaxies: elliptical and lenticulars, CD - galaxies: ISM - galaxies: fundamental parameters

Simbad objects: 46

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Number of rows : 46

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 584 GiP 01 31 20.755 -06 52 05.02 11.93 11.44 10.48     ~ 370 2
2 NGC 596 GiG 01 32 51.906 -07 01 53.54   11.5       ~ 230 0
3 NGC 636 GiG 01 39 06.529 -07 30 45.37   12.5       ~ 181 0
4 2E 0150.5-1358 ClG 01 53 00.40 -13 44 18.0           ~ 386 0
5 NGC 720 GiG 01 53 00.523 -13 44 19.25   12.4   10.36   ~ 494 0
6 NGC 821 G 02 08 21.150 +10 59 41.53   12.210 11.310 10.739 9.744 ~ 545 0
7 NGC 1052 GiP 02 41 04.79851 -08 15 20.7517 11.84 11.41 10.47 10.71   ~ 1179 2
8 NGC 2768 SyG 09 11 37.504 +60 02 13.95 11.30 10.84 9.87     ~ 471 2
9 NGC 2974 Sy2 09 42 33.267 -03 41 56.82   12.19   10.77   ~ 416 0
10 NGC 3115 GiG 10 05 13.978 -07 43 06.89   11   9.37   ~ 944 2
11 NGC 3156 GiG 10 12 41.2459118495 +03 07 45.693904357   12.8       ~ 223 0
12 NGC 3193 GiP 10 18 24.884 +21 53 38.32 12.29 11.83 10.88 12.19   ~ 269 1
13 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 735 1
14 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1397 0
15 NGC 3585 GiG 11 13 17.109 -26 45 17.96   10.64   9.22   ~ 267 0
16 NGC 3605 GiG 11 16 46.622 +18 01 01.71   12.7       ~ 245 0
17 NGC 3608 LIN 11 16 58.967 +18 08 54.71   11.7       ~ 483 0
18 NGC 3610 GiG 11 18 25.276 +58 47 10.49   11.4       ~ 287 0
19 NGC 3613 GiG 11 18 36.130 +57 59 59.73   11.6       ~ 194 0
20 NGC 3640 GiG 11 21 06.852 +03 14 05.15 11.89 11.36 10.44     ~ 257 3
21 NGC 3872 GiP 11 45 49.069 +13 46 00.07   12.9       ~ 89 0
22 NGC 4125 GiP 12 08 06.017 +65 10 26.88 11.14 10.65 9.72     ~ 401 2
23 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1141 0
24 NGC 4365 GiG 12 24 28.228 +07 19 03.07   11.5       ~ 806 0
25 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1665 2
26 NGC 4387 GiG 12 25 41.6768872639 +12 48 37.809497625 13.42 13.01 12.12   10.87 ~ 374 1
27 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1022 1
28 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 1989 2
29 NGC 4473 GiG 12 29 48.878 +13 25 45.55 11.60 11.16 10.20     ~ 612 1
30 NGC 4478 GiP 12 30 17.439 +12 19 42.88 12.82 12.36 11.45   10.17 ~ 474 1
31 UGCA 283 GiG 12 30 31.985 +12 29 24.85   14.5       ~ 389 0
32 NGC 4494 GiP 12 31 24.034 +25 46 29.93   10.55 9.74     ~ 454 0
33 NGC 4551 GiP 12 35 37.980 +12 15 50.44 13.49 12.97 12.02     ~ 337 1
34 NGC 4564 GiG 12 36 26.994 +11 26 21.55 12.51 12.05 11.12     ~ 569 1
35 M 59 GiG 12 42 02.322 +11 38 48.95   11.0       ~ 667 0
36 M 60 GiP 12 43 40.008 +11 33 09.40   10.3       ~ 1270 0
37 NGC 4660 GiP 12 44 31.9848549289 +11 11 25.730688043   12.1       ~ 401 0
38 NGC 4742 GiG 12 51 48.0411725334 -10 27 17.200326999   12   11.55   ~ 214 1
39 NGC 5322 SyG 13 49 15.24 +60 11 25.8   11.3       ~ 386 2
40 NGC 5576 GiP 14 21 03.691 +03 16 15.78 12.25 11.85 10.96     ~ 307 1
41 NGC 5638 GiP 14 29 40.389 +03 14 00.39 12.57 12.14 11.20     ~ 229 2
42 NGC 5813 LIN 15 01 11.265 +01 42 07.09 12.00 11.45 10.46 10.06   ~ 591 1
43 NGC 5831 GiG 15 04 07.024 +01 13 11.70   13.1   11.19   ~ 281 0
44 NGC 5845 GiG 15 06 00.787 +01 38 01.77   13.8 11.20 12.06 9.94 ~ 360 0
45 MCG+00-38-026 GiP 15 06 29.199 +01 35 41.55   14.1 13.37 13.07 12.1 ~ 108 0
46 NGC 5846 BiC 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 790 1

    Equat.    Gal    SGal    Ecl

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2021.04.19-14:10:09

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