Really strong

Posted January 25, 2014 4:22 AM

by akapinska scientist in response to basst82's comment.

Giants are radio galaxies that are over 1 Mpc in length from one lobe to the other. Since we don't know what redshift we are looking at (unless we check the SDSS link and are confident with the host identification), here within RGZ we would classify as a giant a radio galaxy that extends beyond the image you are shown. Basically, the sources would need to be at least 5-6 arcmins or more - the image here is only 3 by 3 arcmin. So this is not a giant, although a very beautiful source anyway! Have a look at examples in this thread to see what is labelled as giants (well, giant candidates until we confirm them with more data) http://radiotalk.galaxyzoo.org/#/boards/BRG0000003/discussions/DRG00001mg

Posted January 27, 2014 8:13 AM

by c_cld

Illustration with a known GIANT 4C 51.31B

FR II High brightness regions further from galaxy than low brightness regions

posted in GZ forum

SDSS J152114.55+510500.8 1237659326022156522

FIRST

projected linear size: 4.6arcmin i.e. 1.404 Mpc at redshift 0.37 :😃

superposition SDSS/FIRST

1237659326022156522

Posted February 24, 2014 10:13 AM