3D visualisation of pulsars

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selden
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3D visualisation of pulsars

Post #1by selden » 06.05.2017, 18:13

Here's v5 of my Addon which shows positions of the 2617 pulsars in ATNF's current catalog, v1.56. The previously published version of the Addon (v2, December, 2004) showed the positions of the 1509 pulsars in v1.2 of their catalog.

I was surprised to see that there seems to be an indication of a galactic arm which wasn't present in their earlier catalog. I haven't investigated to determine how much of it is due to revised pulsar positions and how much is due to the additional pulsars in their updated database.

atnf_pulsars_v5.zip
274 KB expands to 1.5 MB
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pulsars_v5.jpg
db v1.56


atnf_pulsars.jpg
db v1.2
Selden

eburacum45
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Post #2by eburacum45 » 06.05.2017, 19:34

Flipping between the galaxy view and the pulsar data, you can see where the two agree, and where they diverge. Both the Sagittarius arm and the Perseus arm are a bit closer to us on the pulsar map than on the galaxy map, and there appears to be a whole new arm at around 6 o'clock. Very interesting.

john71
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Post #3by john71 » 07.05.2017, 13:59

Selden, thanks for sharing!

I edited the Milky Way.png file manually.

This is the result:

Milky Way new.png


This is the edited Milky Way.png file:

MilkyWay.png
MilkyWay.png (9.49 KiB) Viewed 1961 times


If someone has more time it would be fantastic to see a more accurate new Milky Way.png file...

Added after 29 minutes 34 seconds:
I changed the two attached files...these are v.3...

john71
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Post #4by john71 » 09.05.2017, 16:05

Version 4.0. :)

I merged my manually created png file with the original Milky Way.png...

Milky Way new.png


This the new Milky Way.png...

MilkyWay.png
MilkyWay.png (22.26 KiB) Viewed 1928 times


Added after 2 hours 19 minutes:
Version 5.0.

I found this Milky Way map, it is supposed to be the most accurate.

o-MILKY-WAY-MAP-900.jpg


Now, I merged all three Milky Way maps into one...

Milky Way new.png


And this is the Milky Way.png file:

MilkyWay.png
MilkyWay.png (21.63 KiB) Viewed 1918 times

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FarGetaNik M
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Post #5by FarGetaNik » 09.05.2017, 19:37

Hm... I found a version of the Milky Way map without a grid: https://photojournal.jpl.nasa.gov/catalog/PIA10748 and managed to process it into a texture without repainting:

MilkyWay2.png
MilkyWay2.png (15 KiB) Viewed 1914 times


Maybe not optimized for Celestia, but I wonder if that could mean Celestia's galaxy modeling is not optimized :wink:. Anyways, this texture might be totally wrong in scale and maybe rotated by 180°, I didn't check. If this method works, we could produce better models of galaxies in Celestia :smoke:

john71
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Post #6by john71 » 09.05.2017, 20:28

Thanks! I'm using layers and alpha channels to merge and edit the Milky Way.png. I suspect that the current "official" version is not accurate, it would be nice to have a correct one.

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FarGetaNik M
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Post #7by FarGetaNik » 09.05.2017, 21:03

Yes, it might not be that accurate. There are some shematic views that might be better, but we will have to wait for gaia data to get an accurate structure. Well at least this method could work for other galaxies.

john71
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Post #8by john71 » 09.05.2017, 21:24

Version 6.0.

Celestia screen:

Milky Way new.png


Milky Way.png:

MilkyWay.png
MilkyWay.png (13.72 KiB) Viewed 1903 times

john71
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Post #9by john71 » 13.05.2017, 10:04

Version 7.0 (final)

Milky Way new.png


Milky Way.png

MilkyWay.png
MilkyWay.png (23.28 KiB) Viewed 1847 times

john71
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Post #10by john71 » 13.05.2017, 11:59

Version 8.0 (final-final version :) )

OK, I will stop. This is really the last time.

I used three images as source:

MilkyWay2.png
MilkyWay2.png (14.79 KiB) Viewed 1839 times


milky_way.png


MilkyWayold.png
MilkyWayold.png (20.55 KiB) Viewed 1839 times


This is the merged result in Celestia:

Milky way celestia.png


This is the new Milky Way.png file:

MilkyWay.png
MilkyWay.png (25.36 KiB) Viewed 1839 times


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