Colours of Galaxies : a redshift chart

• by Budgieye moderator

  Different types of galaxies have different colours.

  The colour of the galaxy changes with redshift, which is an indication of distance away.

  elliptical galaxies - have white stars
  spiral galaxies - have blue stars
  compacts galaxies- produce ultraviolet light (UV) from young stars (star-forming galaxies)
  OIII objects - produce emission lines from hot oxygen from supernova explosions
  active nucleus - produce emission lines from hot hydrogen (Hα emissions)

  All these object have a spectral chart: Click on blue link.

  updated from Galaxy Zoo forum Colours of Galaxies in SDSS : Redshift chart

  Colours of Galaxies in SDSS : Redshift chart

  I thank all the people who posted in the Forum, so I only had to look through posts to find these examples.

  z=0.000 object is in our galaxy

  z=0.000 ...white light...............blue light.............. redshifted uv light.......Hot Oxygen ...........Hot hydrogen

  z=0.000
  
  
  
  

  z=0.000
  
  
  
  

  z=0.000
  white star ..................
  blue star.............
  white dwarf star.............
  Owl nebula...........
  Orion nebula

  ---

  z=0.001
  
  
  
  
  

  z=0.001elliptical galaxy............
  spiral galaxy ........
  compact galaxy..
  star-forming in NGC 5457.....
  hydrogen in M82

  ---

  z=0.005
  
  
  
  

  z=0.005
  elliptical galaxy.............
  spiral...............
  blue compact..............
  blue pea...........
  green near nucleus

  ---

  z=0.01
  
  
  
  
  

  z=0.01
  elliptical galaxy ............
  spiral.................
  compact galaxy.......
  blue pea galaxy..
  green near nucleus

  ---

  z=0.02
  
  
  
  
  

  z=0.02
  elliptical galaxy............
  spiral galaxy.......
  blue compact.......
  blue pea galaxy..
  green near nucleus

  ---

  z=0.03
  
  
  v
  
  

  z=0.03
  elliptical.............................
  spiral.......................
  compact........
  blue pea galaxy......
  AGN with jet

  ---

  z=0.04
  
  
  
  
  

  z=0.04
  elliptical..........................
  spiral.........................
  compact...........
  blue pea galaxy..............
  AGN

  ---

  z=0.05
  
  
  
  
  

  z=0.05
  elliptical............................
  spiral...................
  compact.............
  purple pea galaxy....
  Seyfort 1 quasar

  ---

  z=0.06
  
  
  
  
  

  z=0.06
  elliptical.........................
  spiral.......................
  compact............
  purple pea galaxy...
  Seyfort 1 quasar

  ---

  z=0.07
  
  
  
  
  

  z=0.07
  elliptical..........................
  spiral.....................
  compact................
  purple pea............
  Seyfort 1 quasar

  z=0.08
  
  
  
  
  

  ---

  z=0.08
  elliptical..........................
  spiral...................
  star-forming............
  purple pea..............
  AGN cloud

  ---

  z=0.09
  
  
  
  
  

  z=0.09
  elliptical..................
  spiral.....................
  star-forming................
  purple pea.............
  Seyfort 1 quasar

  ---

  z=0.1
  
  
  
  
  

  z=0.1
  elliptical...........................
  spiral.....................
  compact.................
  white pea............
  Seyfort 1 quasar

  ---

  z=0.2
  
  
  
  
  

  z=0.2
  elliptical.........................
  spiral.....................
  starburst....................
  green pea............
  blue quasar

  ---

  z=0.3
  
  
  
  
  

  z=0.3
  elliptical?.............
  spiral seen by HST....
  post starburst............
  green pea............
  blue quasar

  ---

  z=0.4
  
  
  
  
  

  z=0.4
  elliptical + lens....
  spiral? no spectrum...
  post starburst...........
  yellow pea.............
  blue quasar

  ---

  z=0.5
  
  
  
  
  

  z=0.5
  elliptical..................
  spiral from HST.......
  post starburst.............
  red pea...................
  blue quasar

  ---

  z=0.6
  
  
  
  
  

  z=0.6
  elliptical?....................
  radio source...........
  post starburst.............
  red pea..................
  quasar

  ---

  z=0.7
  
  
  
  
  

  z=0.7
  elliptical?..........
  barred spiral from HST...
  post starburst...........
  pea?........................
  quasar

  ---

  z=0.8
  
  
  
  
  

  z=0.8
  elliptical or star........
  spiral from HST...
  lensed starburst............
  pea..........................
  quasar

  ---

  z=0.9
  ..................................
  
  
  
  

  z=0.9
  .................................
  spiral from HST.........
  lensed starburst.........
  pea......................
  quasar

  ---

  z=1
  
  
  
  
  

  Posted July 18, 2014 7:46 AM

• by Budgieye moderator

  z=3
  .........................................................................................................................................
  

  z=3

  .......................................................................................................................................................
  quasar

  Posted July 27, 2014 6:56 AM

• by planetaryscience

  Both helpful and interesting. I should really get around to making collections based on measured redshift.

  Posted July 27, 2014 4:59 PM