2006A&A...455..845F


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.08CET20:42:31

2006A&A...455..845F - Astronomy and Astrophysics, volume 455, 845-851 (2006/9-1)

Towards a phylogenetic analysis of galaxy evolution: a case study with the dwarf galaxies of the Local Group.

FRAIX-BURNET D., CHOLER P. and DOUZERY E.J.P.

Abstract (from CDS):

The Hubble tuning-fork diagram has always been the preferred scheme for classifying galaxies. It is based only on morphology. In contrast, biologists have long taken the genealogical relatedness of living entities into account for classification purposes. Assuming branching evolution of galaxies as a ``descent with modification'', we show here that the concepts and tools of phylogenetic systematics that are widely used in biology can be heuristically transposed to the case of galaxies. This approach, which we call ``astrocladistics'', is applied to dwarf galaxies of the Local Group and provides the first evolutionary tree for real galaxies. The trees that we present here are solid enough to support the existence of a hierarchical organisation in the diversity of dwarf galaxies of the Local Group. They also show that these galaxies all stem from a common ancestral kind of object. We find that some kinds of dIrrs are progenitors of both dSphs and other kinds of dIrrs. We also identify three evolutionary groups, each one with its own characteristics and own evolution. The present work opens a new way to analysing galaxy evolution and a path towards a new systematics of galaxies. Work on other galaxies in the Universe is in progress.

Abstract Copyright:

Journal keyword(s): galaxies: fundamental parameters - Galaxy: evolution - galaxies: formation

Simbad objects: 39

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Number of rows : 39

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 NAME WLM Galaxy G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 590 2
2 NGC 55 GiG 00 14 53.602 -39 11 47.86 8.54 8.58 7.87 7.84   ~ 716 2
3 IC 10 G 00 20 23.16 +59 17 34.7   13.6 9.5     ~ 1023 0
4 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 632 1
5 NAME Andromeda III G 00 35 22.7 +36 30 17     14.4     ~ 277 0
6 NGC 185 Sy2 00 38 57.970 +48 20 14.56   9.10 9.2     ~ 740 1
7 M 110 GiG 00 40 22.0544552438 +41 41 07.496294862   8.92 8.07     ~ 1230 1
8 M 32 IG 00 42 41.825 +40 51 54.61 9.51 9.03 8.08     ~ 2035 2
9 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11223 1
10 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 312 0
11 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1157 4
12 NAME Pisces I G 01 03 56.6 +21 53 41   16.18 14.3     ~ 363 0
13 IC 1613 GiC 01 04 54.2 +02 08 00   10.42 10.01 9.77   ~ 1122 2
14 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 351 0
15 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 468 2
16 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1520 1
17 UGCA 92 G 04 32 04.9 +63 36 49   16.15       ~ 117 0
18 NAME Carina dSph G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1017 0
19 NAME Leo Dwarf Irregular Galaxy G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 553 0
20 NAME Sextans B H2G 10 00 00.8201300945 +05 20 09.572530884 12.77 12.25 11.89 11.71   ~ 479 0
21 NGC 3109 G 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 703 2
22 NAME Antlia Dwarf Galaxy G 10 04 03.9 -27 20 01 16.73 15.69 15.17 15.00   ~ 196 1
23 NAME Leo I dSph G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1078 1
24 NAME Sex A H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 662 2
25 NAME Dwarf Elliptical Galaxy in Sex G 10 13 02.9 -01 36 53   12 10.4     ~ 733 0
26 NAME Leo B G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 755 0
27 UGC 8091 H2G 12 58 40.1930291852 +14 13 00.737117016 15.24 15.16 14.98 14.81   ~ 443 0
28 NAME UMi Galaxy G 15 09 11.34 +67 12 51.7   13.60 10.6     ~ 1208 0
29 NAME Dra dSph G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1197 1
30 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 1815 2
31 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 279 1
32 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1453 0
33 NAME Aquarius Dwarf G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 399 1
34 IC 5152 G 22 02 41.521 -51 17 47.20   11.03 10.9 10.19   ~ 220 1
35 NAME Tuc Galaxy G 22 41 49.6 -64 25 10   15.7 15.2     ~ 271 0
36 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 219 0
37 ESO 407-18 G 23 26 27.52 -32 23 19.5 15.34 14.71 14.23 14.03   ~ 144 0
38 NAME Peg Dwarf Irregular Galaxy G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 425 1
39 NAME Local Group GrG ~ ~           ~ 7190 0

    Equat.    Gal    SGal    Ecl

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2021.03.08-20:42:31

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