2021A&A...650A..50E

Query : 2021A&A...650A..50E

2021A&A...650A..50E - Astronomy and Astrophysics, volume 650A50-50 (2021/6-1)

Ubiquitous signs of interactions in early-type galaxies with prolate rotation.

EBROVA I., BILEK M., VUDRAGOVIC A., YILDIZ M.K. and DUC P.-A.

Abstract (from CDS):


Context. A small fraction of early-type galaxies (ETGs) show prolate rotation; that is, they rotate around their long photometric axis. In simulations, certain configurations of galaxy mergers are known to produce this type of rotation.
Aims. We investigate the association of prolate rotation and signs of galaxy interactions among the observed galaxies.
Methods. We collected a sample of 19 nearby ETGs with distinct prolate rotation from the literature and inspected their ground-based deep optical images for interaction signs - 18 in archival images and 1 in a new image obtained with the Milankovic telescope.
Results. Tidal tails, shells, disturbed asymmetric stellar halos, or ongoing interactions are present in all the 19 prolate rotators. Comparing this with the frequency of tidal disturbance among the general sample of ETGs of a roughly similar mass range and surface-brightness limit, we estimate that the chance probability of such an observation is only 0.00087. We also find a significant overabundance of prolate rotators that are hosting multiple stellar shells. The visible tidal features imply a relatively recent galaxy interaction. That agrees with the Illustris large-scale cosmological hydrodynamical simulation, where prolate rotators are predominantly formed in major mergers during the last 6Gyr. In the appendix, we present the properties of an additional galaxy, NGC 7052, a prolate rotator for which no deep images are available, but for which an HST image revealed the presence of a prominent shell, which had not been reported before.

Abstract Copyright: © ESO 2021

Journal keyword(s): galaxies: evolution - galaxies: interactions - galaxies: peculiar - galaxies: kinematics and dynamics - galaxies: structure

Simbad objects: 49

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Number of rows : 49
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
3 NGC 474 GiP 01 20 06.6870520512 +03 24 55.861973100 12.75 12.37 11.51 11.42 10.56 ~ 371 1
4 NGC 647 LIN 01 39 56.1940121280 -09 14 32.746476984   15   13.03   ~ 34 0
5 NGC 680 GiP 01 49 47.2923018240 +21 58 15.142526652   13.0       ~ 154 0
6 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
7 NGC 810 LIN 02 05 28.5494795136 +13 15 05.494803012   15.4       ~ 54 1
8 SMDG J0239150-080657 LSB 02 39 15.11 -08 06 58.6     16.5   16.2 ~ 116 0
9 NGC 1047 GiP 02 40 32.8417000656 -08 08 51.635714460   14.50       ~ 66 1
10 NGC 1052 Bla 02 41 04.79849989 -08 15 20.7519527 11.84 11.41 10.47 10.71   ~ 1397 2
11 LEDA 3097693 LSB 02 41 46.80 -08 24 09.3     16.2   15.8 ~ 183 0
12 NGC 1222 Sy2 03 08 56.7398731608 -02 57 18.587969280   13.3   13.0 13.2 ~ 210 0
13 LEDA 18578 G 06 11 05.7996922368 -33 18 03.628401336   16.18   14.92   ~ 9 0
14 ESO 364-42 IG 06 11 06.8789910648 -33 18 29.458907604   15.66   14.40   ~ 26 0
15 NGC 2258 AGN 06 47 46.2009489480 +74 28 54.536253852   13.2       ~ 66 0
16 Z 87-35 BiC 07 46 18.603 +18 22 07.30   15.3       ~ 42 0
17 NGC 2484 Sy2 07 58 28.10812817 +37 47 11.8076475   14.15 14.9     ~ 284 1
18 NGC 2783 LIN 09 13 39.4766036016 +29 59 34.601211960   13.9   12.05   ~ 137 0
19 NGC 2832 LIN 09 19 46.853 +33 44 59.07   13.3 13.17     ~ 274 3
20 NGC 3613 GiG 11 18 36.130 +57 59 59.73   11.6       ~ 221 0
21 NGC 3923 GiG 11 51 01.783 -28 48 22.36 11.41 10.59 9.80 8.88   ~ 459 1
22 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1290 0
23 NAME Virgo W GrG 12 20.0 +05 48   6.3       ~ 89 0
24 NGC 4342 GiP 12 23 39.0032044488 +07 03 14.359499100   13.0       ~ 337 0
25 NGC 4365 GiG 12 24 28.228 +07 19 03.07   11.5       ~ 871 0
26 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1841 2
27 M 85 GiP 12 25 24.053 +18 11 27.89   10.2       ~ 678 0
28 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1126 1
29 NGC 4458 GiP 12 28 57.5613938232 +13 14 30.946545276 13.27 12.93 12.07     ~ 429 2
30 NGC 4461 GiP 12 29 03.010 +13 11 01.88 12.56 12.09 11.19     ~ 247 2
31 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
32 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
33 NGC 4572 GiG 12 35 45.384 +74 14 33.44   14.9       ~ 45 0
34 NGC 4589 LIN 12 37 24.9947272593 +74 11 30.861224110   12.0       ~ 300 1
35 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 12.71 12.27 11.386 ~ 814 3
36 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
37 NGC 5216 Sy2 13 32 06.9115980360 +62 42 02.424417552   16.80 16.14     ~ 137 0
38 NGC 5218 AGN 13 32 10.4297476488 +62 46 04.122362532   13.1       ~ 181 1
39 NAME Keenan's System GrG 13 32.2 +62 44           ~ 73 0
40 NGC 5485 LIN 14 07 11.3594809920 +55 00 06.084219996 14.34 13.82 12.22     ~ 267 0
41 NGC 5557 GiG 14 18 25.708 +36 29 37.28   12.2       ~ 237 0
42 NGC 5982 LIN 15 38 39.778 +59 21 21.21   12.4       ~ 302 0
43 ACO 2197 ClG 16 27 48.01 +40 58 04.5           ~ 290 0
44 NGC 6173 LIN 16 29 44.8864037664 +40 48 41.890972320   14.0       ~ 180 0
45 Z 225-36 LIN 17 05 05.5788082104 +43 02 35.344416012   14.7       ~ 50 0
46 NGC 6338 Bla 17 15 22.9842192344 +57 24 40.346559927   14.2   8   ~ 205 2
47 NGC 7052 rG 21 18 33.0441963648 +26 26 49.174586196 15.52 14.85 13.09     ~ 348 1
48 NGC 7252 AGN 22 20 44.7748209648 -24 40 41.909518200 12.26 12.46 12.06 11.57   ~ 720 1
49 NAME Local Group GrG ~ ~           ~ 9325 0

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