2000AJ....119..111D


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.16CEST21:13:56

2000AJ....119..111D - Astron. J., 119, 111-118 (2000/January-0)

Study of McLeish's interacting object.

DIAZ R., RODRIGUES I., DOTTORI H. and CARRANZA G.

Abstract (from CDS):

We discuss the morphology, kinematics, and physical conditions of the emitting gas of the interacting system IRAS 20048-6621. We present as well numerical simulations of this interacting system, discovered by David McLeish in 1946. The main galaxy (McL A) is an edge-on spiral galaxy with highly distorted NW side. On this side is also located McL B, the perturber galaxy. We determined a distance of 151 Mpc (h=0.75) and a diameter of 70 kpc for McL A. It presents a bright nucleus with broad red emission lines (<FWHM>~500 km.s–1). McL A has far-IR color indexes closely comparable to NGC 3628, one the few nearby edge-on galaxies which is a bright infrared emitter. Nevertheless, McL A is more luminous (in these bands) than any of the edge-on galaxies in the sample of bright infrared galaxies of Young et al. (1988). The two sides of McL A rotation curve are remarkably different. The N-body model that best reproduces McL A kinematical and morphological data (Kuijken & Dubinski 1995) gives a total mass 7x1011 M for McL A. Numerical simulations with the TREESPH code closely reproduce the morphology and radial velocity observations. The best scenario for this system is that of a prograde encounter between McL A and B, with McL B's orbit 35° tilted with respect to the spiral disk of McL A and a perigalactic distance of 17.6 kpc. The derived mass ratio is McL B/McL A~1/26. In the last 5x108 yr the perturber has crossed the main galaxy disk twice, in between it crossed the perigalacticon. According to our simulations, the emitting gas present in McL B has not been stripped out from the McL A disk, so that leads us to conclude that McL B is an irregular or small spiral galaxy.

Abstract Copyright:

Journal keyword(s): Galaxies: Binary - galaxies: individual (McLeish's object) - Galaxies: Interactions - Galaxies: Kinematics and Dynamics - Galaxies: Nuclei - Galaxies: Peculiar

Simbad objects: 24

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Number of rows : 24

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 UGC 711 GiC 01 08 37.00344 +01 38 28.3596   14.2   14.1 14.2 ~ 75 0
2 NGC 522 GiG 01 24 45.855 +09 59 40.64   14.2       ~ 94 0
3 UGC 1281 LSB 01 49 31.71 +32 35 16.2   13.0       ~ 145 0
4 NGC 684 GiG 01 50 14.0296080098 +27 38 44.456605720   13.2       ~ 59 0
5 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1559 2
6 NGC 931 Sy1 02 28 14.4690482478 +31 18 41.467674278   15.71 14.74     ~ 362 0
7 NGC 1058 Sy2 02 43 30.0247243235 +37 20 28.807743477   12.29 11.75 10.85   ~ 446 0
8 NGC 1142 Sy2 02 55 12.229 -00 11 00.77   15.42 14.41     ~ 300 1
9 ESO 199-12 G 03 03 24.444 -50 29 42.97   15.57   14.23   ~ 23 0
10 NGC 1247 GiG 03 12 14.319 -10 28 52.03   13   12.14   ~ 48 0
11 NGC 2268 GiG 07 14 17.441 +84 22 56.18   12.1       ~ 136 0
12 NGC 3079 Sy2 10 01 57.80342 +55 40 47.2428 11.57 11.54 10.86     ~ 1287 3
13 NGC 3593 GiG 11 14 36.9733686308 +12 49 05.505076217   11.8       ~ 331 2
14 M 65 GiP 11 18 55.957 +13 05 31.96   9.6       ~ 416 1
15 M 66 GiP 11 20 15.026 +12 59 28.64 9.85 9.65 8.92     ~ 1203 4
16 NGC 3628 GiP 11 20 17.018 +13 35 22.16   10.42 9.48 9.22   ~ 771 3
17 NGC 4452 GiG 12 28 43.2984054035 +11 45 18.204118555 13.27 12.87 11.98     ~ 187 1
18 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3927 4
19 NGC 6845 IG 20 00 58.418 -47 04 13.02   15.81 12.16 14.33   ~ 34 1
20 * del Pav PM* 20 08 43.6094697 -66 10 55.443275 4.78 4.32 3.56 2.95 2.61 G8IV 361 0
21 NAME McL B G 20 09 24.2 -66 12 43           ~ 1 0
22 NAME McLeish's Object G 20 09 27.319 -66 12 55.77   15.90       ~ 18 0
23 AM 2208-251 G 22 11 -24.9           ~ 4 0
24 NAME Leo Spur reg ~ ~           ~ 28 0

    Equat.    Gal    SGal    Ecl

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