SDSS Hubble Choice Questions

• by echo-lily-mai

  Why are the classifying choices different between SDSS and Hubble images when choosing "smooth" ?

  Posted September 12, 2012 4:42 PM

• by klmasters scientist, admin

  We wanted to ask slightly different questions about the two sets of images, mostly because we expect more mergers and irregular galaxies in the high redshift Hubble galaxies.

  Posted September 12, 2012 4:44 PM

• by echo-lily-mai

  Interesting, thanks. Looking forward to hearing more.

  Posted September 12, 2012 4:59 PM

• by ElisabethB moderator

  Just stumbled on his topic.
  So you expect more mergers in the Hubble pics, hence the buttons for merger : check
  You also expect more irregulars in the Hubble pic : where is the button for that ?

  Posted October 10, 2012 9:49 PM

• by elizabeth_s

  I would like to see is there anything odd......or even a GPair button ...ect

  Posted October 10, 2012 11:56 PM

• by williamaskew

  There is a button for irregular in the any thing odd choice

  Posted October 11, 2012 12:22 AM

• by ElisabethB moderator

  For the SDSS pictures, you have the choice 'anything odd' and the button for irregular is top row - right

  Posted October 11, 2012 9:20 AM

• by zutopian in response to ElisabethB's comment.

  ElisabethB
  Just stumbled on his topic.
  So you expect more mergers in the Hubble pics, hence the buttons for merger : check
  You also expect more irregulars in the Hubble pic : where is the button for that ?

  For Hubble images there is the question "Clumpy?" and one of the "clumpy" features is "cluster/irregular". (As far as I remember.: Currently, I have a technical problem concerning that site.)

  Posted October 11, 2012 9:33 AM

• by ElisabethB moderator

  Yes, you have the cluster/irregular button, but that is to indicate how the clumps are distributed.
  If you have a non-clumpy galaxy, you cannot indicate irregular.

  Posted October 11, 2012 10:01 AM