2018A&A...617A.113E


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST01:23:55

2018A&A...617A.113E - Astronomy and Astrophysics, volume 617A, 113-113 (2018/9-1)

Formation of S0 galaxies through mergers. Morphological properties: tidal relics, lenses, ovals, and other inner components.

ELICHE-MORAL M.C., RODRIGUEZ-PEREZ C., BORLAFF A., QUEREJETA M. and TAPIA T.

Abstract (from CDS):


Context. Major mergers are popularly considered too destructive to produce the relaxed regular structures and the morphological inner components (ICs) usually observed in lenticular (S0) galaxies.
Aims. We aim to test if major mergers can produce remnants with realistic S0 morphologies.
Methods. We have selected a sample of relaxed discy remnants resulting from the dissipative merger simulations of the GalMer database and derived their properties mimicking the typical conditions of current observational data. We have compared their global morphologies, visual components, and merger relics in mock photometric images with their real counterparts.
Results. Only ∼1-2Gyr after the full merger, we find that: 1) many remnants (67 major and 29 minor events) present relaxed structures and typical S0 or E/S0 morphologies, for a wide variety of orbits and even in gas-poor cases. 2) Contrary to popular expectations, most of them do not exhibit any morphological traces of their past merger origin under typical observing conditions and at distances as nearby as 30Mpc. 3) The merger relics are more persistent in minor mergers than in major ones for similar relaxing time periods. 4) No major-merger S0-like remnant develops a significant bar. 5) Nearly 58% of the major-merger S0 remnants host visually detectable ICs, such as embedded inner discs, rings, pseudo-rings, inner spirals, nuclear bars, and compact sources, very frequent in real S0s too. 6) All remnants contain a lens or oval, identically ubiquitous in local S0s. 7) These lenses and ovals do not come from bar dilution in major-merger cases, but are associated with stellar halos or embedded inner discs instead (thick or thin).
Conclusions. The relaxed morphologies, lenses, ovals, and other ICs of real S0s do not necessarily come from internal secular evolution, gas infall, or environmental mechanisms, as traditionally assumed, but they can result from major mergers as well.

Abstract Copyright: © ESO 2018

Journal keyword(s): galaxies: bulges - galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: formation - galaxies: interactions - galaxies: structure

VizieR on-line data: <Available at CDS (J/A+A/617/A113): tablea2.dat tablea3.dat tablea4.dat>

Simbad objects: 26

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Number of rows : 26

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 524 GiP 01 24 47.707 +09 32 19.65   11.5       ~ 420 1
2 NGC 1079 GiG 02 43 44.3348134245 -29 00 11.773098961   12.17 11.37 10.86 11.5 ~ 126 0
3 NGC 1161 Sy1 03 01 14.08 +44 53 50.6   13.20 12.08     ~ 68 1
4 NGC 1543 EmG 04 12 43.1696030790 -57 44 16.338482645   10.67 10.60 9.74 10.7 ~ 127 0
5 NGC 2782 Sy2 09 14 05.120 +40 06 49.68 12.29 12.30 11.63     ~ 432 3
6 NGC 2787 LIN 09 19 18.6043000282 +69 12 11.642887220   12.92 11.79     ~ 316 0
7 NGC 2880 GiG 09 29 34.618 +62 29 26.23   12.6       ~ 137 0
8 NGC 2902 GiG 09 30 52.892 -14 44 08.98   13.1   12.03 12.4 ~ 64 0
9 NGC 3081 Sy2 09 59 29.5436045645 -22 49 34.748021329   13.06 13.55 11.67 12.1 ~ 412 0
10 NGC 4220 GiP 12 16 11.733 +47 53 00.07   12.4       ~ 133 0
11 NGC 4293 LIN 12 21 12.891 +18 22 56.64   11.6       ~ 252 2
12 M 85 GiP 12 25 24.053 +18 11 27.89   10.2       ~ 603 0
13 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 1959 2
14 NGC 4546 GiG 12 35 29.506 -03 47 35.62 11.89 11.30 10.32     ~ 202 1
15 M 89 LIN 12 35 39.8 +12 33 23 11.29 10.73 9.75     ~ 924 2
16 NGC 4638 GiP 12 42 47.4239000267 +11 26 32.961349655   12.2 11.23     ~ 266 1
17 M 60 GiP 12 43 40.008 +11 33 09.40   10.3       ~ 1251 0
18 NGC 5493 GiG 14 11 29.381 -05 02 37.19   13.5       ~ 89 0
19 NGC 5898 GiG 15 18 13.554 -24 05 52.66   12.37 11.52 10.71   ~ 147 1
20 NGC 5953 GiP 15 34 32.402 +15 11 37.80   13.23 12.45     ~ 337 1
21 NGC 7029 G 21 11 52.0292409836 -49 17 01.318271586   12.54 11.81 11.02   ~ 96 0
22 NGC 7192 GiG 22 06 50.178 -64 18 58.38   12.21 11.21 10.77   ~ 135 0
23 NGC 7213 Sy1 22 09 16.2106632887 -47 10 00.082166299   10.97 12.08 10.50 10.6 ~ 596 0
24 NGC 7371 G 22 46 03.7439797284 -11 00 04.332673556   12.5   11.74 12.1 ~ 78 0
25 NGC 7585 IG 23 18 01.348 -04 39 01.07   12.46 18.7 11.23   ~ 98 0
26 NGC 7742 GiP 23 44 15.7546655695 +10 46 01.536389590   12.5       ~ 198 0

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2020.07.10-01:23:55

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