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8.5 - Satellite galaxies of the Milky Way

The galaxies that accompany our Milky Way can also be arranged concentrically around our galaxy.

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Satellite galaxies of the Milky Way

Illustration 8.5.1 – Satellite galaxies of the Milky Way

 

The table below contains all the objects commonly seen as satellite galaxies.
As can be seen from the tolerances in the table, the distances are sometimes subject to major inaccuracies. The distances are given in light years.
The light year [Ly] is an astronomical unit of measurement. A light year is the distance that light travels in one year.

1 light year [Ly] = 9.461 trillion Km = 9.46110 12Km

The logarithmic values ??of the distances are again plotted as a function of the numbering, which is shown in Figure 8.5.2. As can be seen, there is already good linearity in most of the values.

 

Galaxy Nr Distance Tolerance ln(Distance)
    kiloLy kiloLy  
         

Canis major dwarf

0

24

 

3,17805383

Sagittarius dwarf elliptical galaxy

1

78

7

4,35670883

Ursa-Major-II

2

100

15

4,60517019

Complex H

3

108

 

4,68213123

Bootes II dwarf

4

136

26

4,91265489

Willman 1

5

147

 

4,99043259

Bootes III dwarf

6

150

 

5,01063529

Large Magellanic Cloud

7

165

5

5,10594547

Small Magellanic Cloud

8

195

15

5,27299956

Bootes-I-Dwarf

9

196

9

5,27811466

Ursa Minor Dwarf

10

215

10

5,37063803

Sculptor dwarf

11

258

13

5,55295958

Draco dwarf

12

267

20

5,58724866

Sextans dwarf

13

280

13

5,6347896

Ursa Major I

14

325

 

5,78382518

Carina dwarf

15

329

16

5,79605775

Hercules dwarf

16

430

 

6,06378521

Fornax dwarf

17

450

26

6,10924758

Canes-Venatici-II

18

490

49

6,19440539

Leo II

19

669

39

6,50578406

Canes-Venatici-I

20

718

82

6,57646957

Leo I

21

815

82

6,70318811

Phoenix dwarf

22

1450

100

7,27931884

Barnard's Galaxy

23

1600

 

7,37775891

Leo III

24

2250

325

7,7186855

Tucana dwarf

25

2870

130

7,96206731

 

The e-function can be determined again from the linearized values. The equation for the approximation line is:

y = ln R = 0.1382x + 3.178

The following applies to the distances: R = 24e0.1382x[kiloLy]

The logarithmic distances of the galaxies are shown in Figure 8.5.2. The complete e-function for the galaxies can be seen in Figure 8.5.4.

 

Logarithmic galaxy distances

Illustration 8.5.2 – Logarithmic galaxy distances

 

Linearization

Illustration 8.5.3 – Linearization

 

Satellite galaxies of the Milky Way

Illustration 8.5.4 – Satellite galaxies of the Milky Way



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Der Autor - Klaus Piontzik