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trinitree88
2016-Nov-25, 05:58 PM
It's not when you get what you predicted with your pet idea that you learn a lot, it's when you say that's weird....
The authors use Random Forest with a different algorithm and discover lots of weird stuff to look at....SEE:https://arxiv.org/abs/1611.07526

Random Forest, SEE:http://www.tandfonline.com/doi/full/10.1080/21642583.2014.956265

ngc3314
2016-Nov-27, 12:27 AM
I have long been slightly disappointed that the SDSS spectra did not turn up any fundamentally new kinds of optical objects. The weirdest ones are generally quasars with high-speed absorbing winds or object blends (within the fiber or along the line of sight).

trinitree88
2016-Nov-27, 08:48 PM
I have long been slightly disappointed that the SDSS spectra did not turn up any fundamentally new kinds of optical objects. The weirdest ones are generally quasars with high-speed absorbing winds or object blends (within the fiber or along the line of sight).

Hi ngc3314....they did find 2 never befores...E+A galaxies with broad emission lines, and strong emitters of (N1)...in the discussion....p.22 I think... pete

Jean Tate
2016-Nov-27, 10:31 PM
In the now closed Galaxy Zoo forum, there's a thread called Weirdest Spectra (http://www.galaxyzooforum.org/index.php?topic=279434.0); I think examples of several of the highly unusual objects (per their SDSS spectra) described in the paper are posted there ... certainly I posted at least one example of a 'double emission line' galaxy.

E+A galaxies, with broad narrow or anything in between emission lines, are not new (though Baron&Poznanski did find some new ones).

Myself, I think the weirdest spectra by far are FeLoBALs! :)

ETA: I've also found several weird objects (per their SDSS spectra) in RGZ - weird velocity structure IIRC - but can't find where in RGZ Talk (https://radiotalk.galaxyzoo.org/) I posted them ... :(