2000AJ....120..703H


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.10CEST14:39:56

2000AJ....120..703H - Astron. J., 120, 703-727 (2000/August-0)

Kinematic evidence of minor mergers in normal Sa galaxies: NGC 3626, NGC 3900, NGC 4772, and NGC 5854.

HAYNES M.P., JORE K.P., BARRETT E.A., BROEILS A.H. and MURRAY B.M.

Abstract (from CDS):

BVRI and Hα imaging and long-slit optical spectroscopic data are presented for four morphologically normal and relatively isolated Sa galaxies, NGC 3626, NGC 3900, NGC 4772, and NGC 5854. VLA H I synthesis imaging is presented for the first three objects. In all four galaxies, evidence of kinematic decoupling of ionized gas components is found in the long-slit spectroscopic data; the degree and circumstances of the distinct kinematics vary from complete counterrotation of all of the gas from all of the stars (NGC 3626) to nuclear gas disks decoupled from the stars (NGC 5854) to anomalous velocity central gas components (NGC 3900 and NGC 4772). In the three objects mapped in H I, the neutral gas extends far beyond the optical radius, R_H I/R25_≥2. In general, the H I surface density is very low, and the outer H I is patchy and asymmetric (NGC 3900) or found in a distinct ring, exterior to the optical edge (NGC 3626 and NGC 4772). While the overall H I velocity fields are dominated by circular motions, strong warps are suggested in the outer regions by bending of the minor axis isovelocity contours (NGC 3900) and/or systematic shifts in position angle between inner and outer rings (NGC 3626 and NGC 4772). In the interior, coincidence is found between the Hα and H I in rings, sometimes partial and crisscrossed by dust lanes. Optical imaging is also presented for NGC 4138 previously reported by Jore et al. to show counterrotating stellar components. The multiwavelength evidence is interpreted in terms of the kinematic ``memory'' of past minor mergers in objects that otherwise exhibit no morphological signs of interaction.

Abstract Copyright:

Journal keyword(s): Galaxies: Evolution - Galaxies: Individual: NGC Number: NGC 3626 - Galaxies: Individual: NGC Number: NGC 3900 - Galaxies: Individual: NGC Number: NGC 4138 - Galaxies: Individual: NGC Number: NGC 4772 - Galaxies: Individual: NGC Number: NGC 5854 - Galaxies: Interactions - Galaxies: Kinematics and Dynamics - Galaxies: Spiral

Nomenclature: p.708-709: [HJB2000] HHMMSS.s+DDMMSS N=6.

Simbad objects: 32

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Number of rows : 32

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 1169 GiG 03 03 34.756 +46 23 10.74   13.2       ~ 101 0
2 NGC 2745 GiG 09 04 39.3284341481 +18 15 26.469159818   15.5       ~ 11 0
3 NGC 3593 GiG 11 14 36.9733686308 +12 49 05.505076217   11.8       ~ 331 2
4 NAME NGC 3607 Group GrG 11 17 55.9 +18 07 35   9.9       ~ 52 0
5 M 65 GiP 11 18 55.957 +13 05 31.96   9.6       ~ 415 1
6 [HJB2000] 111713.5+183738 Rad 11 19 51.2 +18 21 12           ~ 1 0
7 UGC 6341 GiP 11 20 00.667 +18 15 37.78   16.0       ~ 27 0
8 NGC 3626 GiG 11 20 03.794 +18 21 24.45   11.2       ~ 232 0
9 LGG 237 GrG 11 24 25.6 +17 22 44           ~ 5 0
10 NGC 3900 GiP 11 49 09.4572317940 +27 01 19.260409128   12.5       ~ 166 0
11 2MASX J11491100+2703444 G 11 49 11.028 +27 03 44.84           ~ 3 0
12 LGG 252 GrG 11 49 20 +26 54.3           ~ 5 0
13 NGC 3912 GiP 11 50 04.449 +26 28 44.39   13.2       ~ 71 0
14 NGC 4138 Sy1 12 09 29.788 +43 41 07.14 12.46 12.29 11.32 10.82   ~ 367 1
15 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 6008 0
16 NGC 4772 LIN 12 53 29.1636622578 +02 10 06.133021648 12.29 11.96 11.04     ~ 225 1
17 [HJB2000] 125058.3+022935 Rad 12 53 31.4 +02 13 19           ~ 1 0
18 [HJB2000] 125059.9+022443 Rad 12 53 33.0 +02 08 27           ~ 1 0
19 [HJB2000] 125106.0+022639 Rad 12 53 39.1 +02 10 23           ~ 1 0
20 [HJB2000] 125109.5+022815 Rad 12 53 42.6 +02 11 59           ~ 1 0
21 MCG+00-33-020 GiP 12 54 41.634 +02 06 15.27   14.8   14.003   ~ 15 0
22 APG 277 IG 12 54 49.9 +02 38 57           ~ 59 1
23 NGC 4809 GiP 12 54 51.06 +02 39 14.7   14.20       ~ 64 2
24 NGC 4810 GiP 12 54 51.480 +02 38 16.43   14.8       ~ 57 1
25 NGC 4866 LIN 12 59 27.140 +14 10 15.78   11.9       ~ 191 0
26 NGC 5377 AGN 13 56 16.6685659057 +47 14 08.562084661   12.39 11.46 10.87 10.25 ~ 215 1
27 NGC 5448 LIN 14 02 50.072 +49 10 21.53   12.7       ~ 147 0
28 NAME NGC 5846 Group GrG 15 05 47.0 +01 34 25   10.0       ~ 132 0
29 MCG+00-39-003 G 15 07 37.189 +02 01 09.80   15.7   14.25   ~ 11 0
30 NGC 5854 GiG 15 07 47.6988967536 +02 34 07.058455395   13.1   11.23   ~ 140 0
31 NGC 7217 LIN 22 07 52.368 +31 21 33.32   12.94 11.92     ~ 468 0
32 NAME Local Group GrG ~ ~           ~ 7226 0

    Equat.    Gal    SGal    Ecl

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2021.04.10-14:39:56

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