1998A&AS..130..267L

Query : 1998A&AS..130..267L

1998A&AS..130..267L - Astron. Astrophys., Suppl. Ser., 130, 267-283 (1998/June-1)

Star formation history of early-type galaxies in low density environments. II. Kinematics.

LONGHETTI M., RAMPAZZO R., BRESSAN A. and CHIOSI C.

Abstract (from CDS):

The present paper is a companion of two others dedicated one to the measurement of the line-strength indices (Longhetti et al.,1998A&AS..130..251L) and the second to trace back the star formation history of a sample of early-type galaxies by comparing observed indices to the predictions of new spectro-photometric models Longhetti et al. (1998b, Paper III). The sample of 51 early-type galaxies in low density environments is composed of two sub-sets of galaxies: 21 shell galaxies from the Malin & Carter (1983) catalogue (one of which shows double nucleous and has been considered as two separate objects) and 30 members of isolated interacting pairs from the Reduzzi & Rampazzo (1995ApL....30....1R) catalogue. Most of the objects show fine structures. The paper collects nuclear kinematic data together with the velocity and velocity dispersion curves of the stellar and gaseous components as a function of the distance from the galaxies centres. The galaxies heliocentric systemic velocity compares within -1±32km/s with RC3 data, while their central velocity dispersion compares within 9±9km/s, 10±27km/s and 2±33km/s with Gonzalez (1993, Ph .D. thesis), Davies et al. (1987ApJS...64..581D) and Carter et al. (1988MNRAS.235..813C) respectively. The detailed comparison between our velocity and velocity dispersion curves and those from several authors is discussed. 9 out of 22 shell galaxies nuclei show emission lines, 4 of which, using data in the literature, have line ratios characteristic of LINERs. 10 members of pairs out of 30 show emission lines. RR 331a has a Seyfert like nucleus, while for the remaining galaxies the ([O III] λ 5007)/Hβ ratio is characteristic of low ionization regions. In a small fraction of the objects the emission component is detectable outside the central value. None of the objects in the sample shows counter-rotation of the gaseous versus the stellar component. The two components appear associated, although, in two cases there is evidence that gas and stars lie on different planes. This latter phenomenon could be associated to accretion events. Emission lines in the central part of the RR 331a show a secondary component in the emission lines profile. E 2400100 has two nuclei embedded in the main body of the galaxy. The U-shape profile of the stellar velocity profile shows the ongoing interaction of the two nuclei. V/σ profile of shell galaxies is, finally, discussed in relation to the hypothesis of the accretion/merging origin of these galaxies.

Abstract Copyright: ∼

Journal keyword(s): galaxies: elliptical and lenticular - galaxies: interactions - galaxies: kinematics and dynamics

Simbad objects: 68

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Number of rows : 68
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 MCG-03-02-006 G 00 22 30.409 -19 39 42.43   16.42   15.19   ~ 5 0
2 IC 1609 G 00 59 46.6064287272 -40 20 00.813474996   13.59   12.07   ~ 30 0
3 ESO 244-12 PaG 01 18 08.31 -44 27 43.4           ~ 88 1
4 MCG-07-03-014 Sy1 01 18 08.370 -44 27 43.29   14.43   13.06   ~ 86 0
5 NGC 584 Sy2 01 31 20.7231919800 -06 52 04.770287472 11.93 11.44 10.48     ~ 417 2
6 MCG-07-05-001 Sy2 01 56 36.6978647040 -39 14 41.498087712   14.55   13.40   ~ 29 0
7 NGC 813 G 02 01 36.0277230504 -68 26 21.178164084   13.84   12.39   ~ 29 0
8 MCG-03-07-044 Sy2 02 38 11.6842405440 -20 10 01.358045148   13.83   12.43   ~ 43 0
9 NGC 1210 Sy2 03 06 45.3516825024 -25 42 58.855024728   13.70   12.54   ~ 45 0
10 NGC 1316 rG 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1491 1
11 NGC 1549 GiP 04 15 45.223 -55 35 32.50 11.22 10.48 9.79 9.08   ~ 255 1
12 NGC 1553 GiP 04 16 10.4697802536 -55 46 48.072797400 10.76 10.10 9.40 8.74   ~ 395 2
13 NGC 1570 GiG 04 22 08.9328223584 -43 37 46.451648820   13.22   11.65   ~ 45 0
14 MCG-04-12-038 GiP 05 03 11.5035251448 -22 48 50.192689860   14.73   13.36   ~ 29 0
15 MCG-04-12-039 EmG 05 03 13.1592264360 -22 49 58.925724240   13.62   12.20   ~ 35 0
16 ESO 486-29 Sy2 05 07 35.2412555088 -23 04 01.160838372   14.59   12.96   ~ 28 0
17 NGC 2865 GiG 09 23 30.205 -23 09 41.37   12.39 11.43 11.06   ~ 244 0
18 NGC 2945 Sy2 09 37 41.1530336544 -22 02 05.995640832   13.23   11.58   ~ 49 1
19 NGC 3051 EmG 09 53 58.6267400544 -27 17 11.030999676   12.79 15.0     ~ 55 0
20 NGC 3289 GiG 10 34 07.4195648472 -35 19 24.030465024   13.68 14.13 12.35   ~ 42 0
21 NGC 4105 Sy2 12 06 40.767 -29 45 36.64   11.35 12.52 9.53   ~ 131 0
22 NGC 4106 GiP 12 06 45.5905 -29 46 06.190   11.61 11.35     ~ 76 0
23 MCG-04-31-005 Sy1 12 55 35.6914004112 -26 49 30.158962932   12.84   11.28 12.35 ~ 50 0
24 MCG-04-31-006 GiP 12 55 44.1064176624 -26 48 33.963737328   13.96   12.64   ~ 37 0
25 NGC 5018 GiP 13 13 01.0452720960 -19 31 05.649751992   11.71   10.31   ~ 335 1
26 MCG-06-32-013 AG? 14 40 29.1376680240 -35 07 24.180907296   13.74   12.07   ~ 30 0
27 MCG-07-31-010 GiP 15 16 09.9432209376 -44 00 53.292791736   14.53   12.59   ~ 23 0
28 ESO 138-29 Sy1 17 29 09.5884251840 -62 26 44.518199568   12.76   11.11   ~ 56 1
29 NGC 6734 GiG 19 07 14.3107879968 -65 27 42.615092916   13.75   12.22   ~ 28 0
30 NGC 6736 GiG 19 07 29.2347470856 -65 25 43.264488612   14.31   12.85   ~ 26 0
31 NGC 6776 AG? 19 25 19.1485272024 -63 51 36.633840408   13.19 11.99 11.59   ~ 88 0
32 ESO 283-19 GiP 19 51 19.9286871672 -44 52 38.523942516   14.82   13.63   ~ 17 0
33 MCG-07-40-010 AG? 19 51 26.3420704776 -44 50 35.802969900   13.99   12.50   ~ 26 0
34 NGC 6849 AG? 20 06 15.6180340992 -40 11 53.765406996   12.90       ~ 70 0
35 IC 5011 EmG 20 28 33.7908233784 -36 01 37.675012692   12.67   11.12   ~ 53 0
36 MCG-06-45-004 EmG 20 28 34.9506792936 -36 02 35.430832968   13.47   12.95   ~ 37 0
37 NGC 6958 AG? 20 48 42.6064604520 -37 59 50.876997504 12.79 12.27 11.42 10.83   ~ 168 1
38 IC 5063 Bla 20 52 02.15 -57 04 06.7   12.92 13.60 11.30   ~ 710 1
39 ESO 107-4 EmG 21 03 29.6532884904 -67 10 52.611761748   12.98 11.87 11.63   ~ 66 0
40 IC 5105 EmG 21 24 22.0100945880 -40 32 15.814424724   12.43 11.54 10.90   ~ 75 0
41 NGC 7135 Sy1 21 49 46.0013389728 -34 52 34.575955536   12.25 13.30 10.84   ~ 95 0
42 ESO 289-15 G 22 18 07.5770892672 -42 41 21.798461004   15.06   13.92   ~ 27 0
43 NGC 7284 EmG 22 28 35.9222830920 -24 50 39.077854512   12.96   11.59   ~ 48 0
44 NGC 7285 AG? 22 28 38.00 -24 50 26.8   12.82   11.54   ~ 39 0
45 IC 5250 IG 22 47 19.8 -65 03 27   12.1 11.11     ~ 29 0
46 IC 5250B GiP 22 47 22.1377595904 -65 03 30.691686492   12.20   10.59   ~ 30 0
47 NGC 7562 GiP 23 15 57.4982037648 +06 41 15.227839176   13.0       ~ 173 0
48 NGC 7619 GiG 23 20 14.524 +08 12 22.63   12.7       ~ 472 0
49 NGC 7626 rG 23 20 42.524 +08 13 01.43   12.8       ~ 438 1
50 IC 5328 AG? 23 33 16.3995184104 -45 00 57.131035308   12.21 11.03 10.82   ~ 99 0
51 ESO 240-10 Sy1 23 37 44.4046340640 -47 30 22.668150492   12.49   11.15   ~ 58 0
52 IC 5358 rG 23 47 45.1086508608 -28 08 26.650470372   13.42 14.72 11.99   ~ 88 1
53 LEDA 72447 rG 23 47 47.1859886280 -28 08 05.928820944   13.46   12.12   ~ 29 0
54 NGC 7785 AG? 23 55 19.0388560224 +05 54 56.735224164   13.00       ~ 179 1
55 IC 5364 Sy1 23 56 25.23193 -29 01 24.2870   15.16   13.75   ~ 23 1
56 AM 2353-291 GiP 23 56 25.9 -29 01 21   14.69   13.33   ~ 15 0
57 ESO 538-10 EmG 23 57 40.0285480704 -21 34 46.585771716   14.92   13.63   ~ 30 0
58 RR95 387 PaG ~ ~           ~ 1 0
59 RR95 287 PaG ~ ~           ~ 2 0
60 RR95 24 PaG ~ ~           ~ 2 0
61 RR95 282 PaG ~ ~           ~ 1 0
62 RR95 397 PaG ~ ~           ~ 1 0
63 RR95 105 PaG ~ ~           ~ 1 0
64 RR95 101 PaG ~ ~           ~ 1 0
65 RR95 62 PaG ~ ~           ~ 1 0
66 RR95 331 PaG ~ ~           ~ 1 0
67 RR95 381 PaG ~ ~           ~ 1 0
68 RR95 278 PaG ~ ~           ~ 1 0

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