Index of common analysis topics

• by jules moderator

  A place to gather some common analysis threads together. Please add any I have missed!

  GLOSSARY, DEFINITIONS AND TIPS

  What does that mean?: A Glossary of parameters available in Tools

  What is a "BPT diagram"? Why do astronomers like to use them?

  What is "color"?

  How to write the symbols "less than" and "greater than"?

  COLOR

  Investigating the color outliers

  Color-color reality check

  First go at exploring data: Colors of quench versus control

  New Board - plotting redshift against the various magnitudes

  Characterising classification biases - Color and Petro_R50 discussion

  MASS

  Mass-driven star formation quenching?

  Estimating the missing stellar masses

  "Reliable masses"?

  SIZE

  Galaxies which are too big (Petro_R50 >> fiber aperture)

  Grossly wrong Petro_R50 values mean that corresponding Abs_r values are also hopelessly wrong

  BPT DIAGRAMS

  Quench Sample - BPT diagram

  BPT diagrams from the SDSS spectroscopic pipeline

  The Cosmic BPT Diagram: Confronting Theory with Observations - relevant to us?

  Posted August 29, 2013 5:25 PM

• by zutopian

  MERGER

  Mass Dependent Merger Fraction (Control vs Post-quenched Sample)
  http://quenchtalk.galaxyzoo.org/#/boards/BGS0000008/discussions/DGS0000203?page=1&comment_id=52446f454f6fda651d000027

  Merger BPT diagram by jules.:

  BPT Diagram Results
  http://quenchtalk.galaxyzoo.org/#/boards/BGS0000008/discussions/DGS00001zx

  Posted October 7, 2013 12:37 PM

• by zutopian

  STAR FORMING

  Star forming galaxies in the quench and control samples started by mlpeck:

  More significantly, I don't see any significant differences between the quench and control samples in any properties that I've looked at so far.

  http://quenchtalk.galaxyzoo.org/#/boards/BGS0000008/discussions/DGS0000204

  UPDATE: Read below post/response by mlpeck:

  Posted October 7, 2013 4:56 PM

• by mlpeck in response to zutopian's comment.

  Read further in that thread. I did find significant differences between the quench and control sample starforming galaxies. It just took more sensitive statistical tests to find them.

  JeanTate also, I think, found the quench sample starforming galaxies to be more reddened, that is dustier, on average.

  Posted October 7, 2013 5:27 PM

• by zutopian

  Star Formation Rates

  Star formation rates and specific star formation rates -- comparing the quench and control samples by mlpeck:

  http://quenchtalk.galaxyzoo.org/#/boards/BGS0000008/discussions/DGS000020t

  Posted October 7, 2013 7:48 PM

• by zutopian

  Quench: Sample vs Control, what's the same, what's different by Jean

  http://quenchtalk.galaxyzoo.org/#/boards/BGS0000008/discussions/DGS00001yj

  Posted October 7, 2013 10:24 PM