3D Model of the 2MASS Redshift Survey

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SUMMARY

A 3D model of the 2MASS Redshift Survey is challenging to create due to difficulties in accurately determining distances to celestial objects. While some galaxies have known redshifts, many do not, particularly those in the Milky Way, complicating the modeling process. A user discovered a website offering a 3D model of over 400,000 galaxies, which can be accessed at this link. However, the program requires significant hardware resources, as even high-performance systems may experience performance issues.

PREREQUISITES
  • Understanding of redshift and its implications in astronomy
  • Familiarity with 3D modeling concepts
  • Knowledge of celestial coordinate systems
  • Experience with high-performance computing requirements
NEXT STEPS
  • Research methods for calculating redshift and distance in astronomy
  • Explore 3D modeling software options for astronomical data visualization
  • Investigate the SDSS (Sloan Digital Sky Survey) and its data accessibility
  • Learn about hardware optimization for running demanding astronomical simulations
USEFUL FOR

Astronomers, astrophysicists, data scientists, and software developers interested in visualizing astronomical data and understanding redshift implications in 3D modeling.

Vorde
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Does anyone know of a 3D model of the data from the 2MASS Survey? I have to imagine it would be incredibly easy to code, but I haven't found one.

Thank you.
 
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It is not so very easy to code, as people have a hard time getting distances to all the objects right.
 
It may just be me talking without really knowing what I'm talking about and sounding like an idiot. But couldn't you have a 3D space with all coordinates in polar form, the distance from the center (us) would be an arbitrary number but scaled by redshift and the degrees x/y specified by the position on the 2D plot?
 
Hi,

You would be completely right if we would have a good measure of the redshift/distance/(any other measure of the distance to us) for all objects. For some galaxies we do, for some we don't and for objects in the Milky Way these are absent (and do not correspond to distance, but only to relative velocity if present). I think that is the main reason this does not exist. For the spectroscopic sample of SDSS, for example, we do have redshifts for many objects. There are movies available of this 3D map on youtube and elsewhere on the web.

Cheers, Harcel
 
Thank you, that makes sense to me.
 
Just as an update to this, by complete chance I stumbled upon a website that did just what I was looking for, including the program to view a 3D model of all the galaxies in their database (400,000+). Here's the link to the page, scroll down and you will see a download link:

http://astro.uchicago.edu/cosmus/projects/sloangalaxies/

As a note, the program is super hardware demanding, I have a quad core i7 and 8 gig of RAM and it is very stuttery for me.
 

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