The Sagitarius A* Project

Purpose

The purpose of the Sagittarius A* Project is two fold:
  1. The first purpose of the "Sagittarius A* Project" is to simulate 10 mini BH's around the black hole in the centre of the Sagittarius A* Constellation.
  2. Secondly its wants to investigate how stable this configuration is, insofar the different BH's influence each other.


Introduction

In the center of the Milky Way, within the Constellation Sagittarius, is a BH: Sagitarrius A*. Around this BH many large stars are orbitting.
For the current situation around the project select this: Carpe Diem and Sagittarius

Project Setup

The project is build around 5 programs:
  1. sagitarrius.xls

    Sagitarrius.xls is an Excel program.
    The purpose of the program is to convert the information in the Wikipedia documention about 10 Mini BH's into a 2D Data Base. For more detail select this link: Sagitarrius.xls.program
  2. VB Draw sagittarius

    This program supports three drawings.
    1. The purpose of this drawing is to convert the information in the 2D Data Base (output of Sagitarrius.xls) into a 3D Data Base (Input of VB sagitarrius and VB2019.sagittarius)
    2. To test two subroutines which are required to Figure 1.412.1 (Angular orbital elements) from the book "Explanatory Supplement to the Astronomical Almanac"
    3. To draw a 3D picture of our Universe containing BH's in a 3D grid, and discuss philosophical implications.
    To get more information select this link: VB Draw Sagittarius
  3. VB sagittarius

    The purpose of this Visual Basic program is to make a simulation of the performance in time of the 10 mini BH's holes using the 3D Data Base (output of VB Draw Sagittarius) as start up information.
    To get more information select this link: VB Sagittarius
  4. VB2019 sagittarius

    The purpose of this Visual Studio 2019 program is to make a simulation of the performance in time of the 10 mini BH's holes using the 3D Data Base (output of VB Draw Sagittarius) as start up information.
    To get more information select this link: VB2019 Sagittarius program
id1 	a 	e 	i () 	omega  	w () 	Tp (yr) 	P (yr) 	Kmag 	q (AU) 	v (%c) 	dv      m0
S1 	0.5950 	0.5560 	119.14 	342.04 	122.30 	2001,800 	166.0 	14.70 	2160.7 	0.55 	0.03    12.40
S2 	0.1251 	0.8843 	133.91 	228.07 	66.25 	2018,379 	16.1 	13.95 	118.4 	2.56 	0.00	13.6
S4 	0.3570 	0.3905 	80.33 	258.84 	290.80 	1957,400 	77.0 	14.40 	1779.7 	0.57 	0.01    12.2
S6 	0.6574 	0.8400 	87.24 	85.07 	116.23 	2108,610 	192.0 	15.40 	860.3 	0.94 	0.00     9.2
S8 	0.4047 	0.8031 	74.37 	315.43 	346.70 	1983,640 	92.9 	14.50 	651.7 	1.07 	0.0     13.2
S9 	0.2724 	0.6440 	82.41 	156.60 	150.60 	1976,710 	51.3 	15.10 	793.2 	0.93 	0.02     8.2
S12 	0.2987 	0.8883 	33.56 	230.10 	317.90 	1995,590 	58.9 	15.50 	272.9 	1.69 	0.01     7.6
S13 	0.2641 	0.4250 	24.70 	74.50 	245.20 	2004,860 	49.0 	15.80 	1242.0 	0.69 	0.01    10.
S14 	0.2863 	0.9761 	100.59 	226.38 	334.59 	2000,120 	55.3 	15.70 	56.0 	3.83 	0.06    10
S62     0.0905 	0.9760 	 72.76 	122.61 	 42.62 	2003,330 	 9.9 	16.10 	16.4 	7.03 	0.04    10
S66 	1.5020 	0.1280  128.50 	 92.30 	134.00  1771,000       664.0 	14.80 	10712.4 0.21 	0.02    10


Reflection 1

The first results of the VB2019 Satitarrius program, over a period of 1000 year, show that the performance of the 10 mini BH's around a common BH is very stable. No collisions are observed.

Reflection 2 - Versus General Relativity

My first impression is that it will be very difficult to demonstrate in any way that the explanation of the movement of the mini BH's around a central BH is outside the scope of Newton's Law and requires General Relativity. In order to simulate the movement of the planets around the Sun, this is different story.

IMO there are two major differences between these two simulations i.e. a simulation of stars around the BH in the center of our Galaxy or a simulation of the planets around the Sun.


Reflection 3 - General Reflection over Sagittarius Project

The Sagittarius Project is a follow up of the Solar System project which consist of a simulation of the planets around the Sun, specific the planet Mercury. The primary purpose was to use to simulate the perihelion shift of the planet Mercury around het pericenter. This is the point closest to the Sun. In reality when you read books about this subject the pictures shown emphasize the aphelion shift. This is the point the farthest away from the Sun.
In fact this is point of the trajectory of the planet Mercury, which is influenced the most when the other planets more or less rotate around the Sun.
This is the reason why in the planet3D simulation Planet3D simulation the position of Mercury at aphelion is emphasized.
This in turn can be the reason that the VB planet3D program and VB Sagittarius program may contain an error based on a incorrect implementation of the parameter w = the argument of the pericenter (P) i.e. angle fron N to P. In stead for w = the angle from N to A is used. Work is scheduled to adress this issue.

As already mentioned the Sagittarius project (as of 20 August 2020) is much less interesting as the Solar System project, specific in relation to the behaviour of the planet Mercury. To read more about this specific subject please study this: Our Galaxy and the movement of planet Mercury , written in 2010.


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Created: 6 August 2020

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