What's up with the green color on the left-side of the galaxy ?

• by cafeeciencia

  What's up with the green color on the left-side of the galaxy ?

  Posted July 17, 2017 1:19 AM

• by Budgieye moderator

  Green in nearby galaxies usually indicates the presence of very hot hydrogen, which is usually caused by the black hole in the center eating stars. The spectral chart shows a hydrogen peak at about 6700, so it is definitely an AGN, active galaxy nucleus. redshift is z=0.005

  The green in not near the nucleus. A reference in NED has it on the binary coalescence list. Maybe it has two nuclei.

  

  http://ned.ipac.caltech.edu/spc1/2009/2009MNRAS.399..683J/54/6dFJ1123402-094744:S:VR:j2009_sp.png

  To understand the colours in galaxies, please see this link

  Galaxy Redshift Chart https://talk.galaxyzoo.org/#/boards/BGZ0000007/discussions/DGZ0000ulp?page=2

  Spectra guide for SDSS images in Galaxy Zoo Talk https://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000ulp?page=3&comment_id=53fef2ee3d5a77490c0001b6

  

  http://skyservice.pha.jhu.edu/DR9/ImgCutout/getjpeg.aspx?ra=170.91758645&dec=-9.79574798&scale=0.049515875&width=700&height=512&opt=&query=

  http://skyserver.sdss.org/dr9/en/tools/explore/obj.asp?ra=170.91760924795042&dec=-9.795720328949518

  IC 0688

  Posted July 17, 2017 6:58 AM