2008A&A...484..299P


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.17CET19:16:42

2008A&A...484..299P - Astronomy and Astrophysics, volume 484, 299-302 (2008/6-3)

Rotation curve bifurcations as indicators of close recent galaxy encounters.

PEDROSA S., TISSERA P.B., FUENTES-CARRERA I. and MENDES DE OLIVEIRA C.

Abstract (from CDS):

Rotation curves of interacting galaxies often show that velocities are either rising or falling in the direction of the companion galaxy. We seek to reproduce and analyse these features in the rotation curves of simulated equal-mass galaxies suffering a one-to-one encounter as possible indicators of close encounters. Using simulations of major mergers in 3D, we study the time evolution of these asymmetries in a pair of galaxies during the first passage. Our main results are: (a) the rotation curve asymmetries appear right at pericentre of the first passage, (b) the significant disturbed rotation velocities occur within a small time interval, of ∼0.5Gyr/h, and, therefore, the presence of bifurcation in the velocity curve could be used as an indicator of the pericentre occurrence. These results are in qualitative agreement with previous findings for minor mergers and flybys.

Abstract Copyright:

Journal keyword(s): galaxies: interactions - galaxy: kinematics and dynamics - galaxies: spiral

Simbad objects: 17

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Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 192 rG 00 39 13.391 +00 51 50.89   13.9   11.97   ~ 109 0
2 NGC 201 GiG 00 39 34.8486162527 +00 51 35.881944746   14.7   12.41   ~ 87 0
3 NGC 542 GiG 01 26 30.825 +34 40 31.72   15.4   14.23   ~ 50 0
4 NGC 5426 GiP 14 03 24.855 -06 04 08.76   12.6   12.76 12.4 ~ 150 0
5 APG 271 IG 14 03 25.45 -06 02 59.9           ~ 206 0
6 NGC 5427 GiP 14 03 26.0408351752 -06 01 50.688001474   14.67 13.96 11.54   ~ 266 0
7 NGC 5953 GiP 15 34 32.402 +15 11 37.80   13.23 12.45     ~ 332 1
8 APG 91 IG 15 34 33.7 +15 11 49   12.3       ~ 24 1
9 NGC 5954 GiP 15 34 35.175 +15 11 53.67   13.7       ~ 153 0
10 MCG-01-53-014 G 20 52 12.751 -05 47 53.88   15.96   15.17   ~ 37 0
11 NGC 6976 G 20 52 26.023 -05 46 19.84   14.95   13.96   ~ 47 0
12 NGC 6978 LIN 20 52 35.4344586778 -05 42 40.042984053   14.22   12.67   ~ 70 0
13 MCG-01-54-012 G 21 20 01.0171523626 -03 55 19.684633857   15.50   14.27   ~ 28 0
14 NGC 7674 Sy2 23 27 56.6974755223 +08 46 44.238278540 13.84 13.92 13.23 12.64   ~ 627 4
15 MCG+01-59-081 G 23 27 58.7548658924 +08 46 57.877607821   16.10   14.38   ~ 51 0
16 LEDA 71507 G 23 28 00.2 +08 46 02   17.13   16.10   ~ 30 0
17 HCG 91c1 G ~ ~           ~ 3 0

    Equat.    Gal    SGal    Ecl

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2020.02.17-19:16:42

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