Blue/Pink Bar

• by metalmania

  Any idea what the blue bar at 6oclock is?...it looks pink in SDSS. Is it just a linear starforming region?

  Posted November 5, 2015 2:20 PM

• by JeanTate in response to metalmania's comment.

  Here's the DR9 SDSS image (it's centered on z_sp 0.082 SDSS J223002.13-001714.1):

  

  Is it just a linear starforming region?

  Linear in projection, yes, I think that it is (it might not be so linear if we could see its 3D shape).

  Hope this helps, and happy hunting! 😃

  Posted November 5, 2015 2:29 PM

• by metalmania

  ok, thanks for taking a look.

  Posted November 5, 2015 2:44 PM

• by ElisabethB moderator

  It is an amazing image !

  Definitely #dailyzoo ! 😄

  Posted November 5, 2015 8:48 PM

• by Budgieye moderator

  Looks like a detached arm. 😃

  Posted January 24, 2016 3:36 PM

• by CeciliaB

  Is it possible that the blue bar could be a small edge-on shining through behind the big galaxy?

  Posted January 24, 2016 4:06 PM

• by ElisabethB moderator in response to CeciliaB's comment.

  For me it looks too well defined to be an edge on.But that is just me ! 😄

  Posted January 24, 2016 6:08 PM

• by c_cld

  In DECaLS DR2

  

  Looking at spectra in SDSS

  foreground clumps SDSS J223002.24-001729.1

  

  background Spiral face on SDSS J223002.13-001714.1

  

  Could be an encounter to happen some time 😃

  Posted January 24, 2016 6:15 PM

• by c_cld

  multiple posts in GZ forum, Object of the day April 03, 2008,

  or "Draw me a sheep" by AlexandredOr http://www.galaxyzooforum.org/index.php?topic=275380.msg402987#msg402987

  587734304342737148

  

  Posted January 24, 2016 6:27 PM

• by CeciliaB in response to c_cld's comment.

  Thanks for the pictures! Evidently the two objects have different spectra and slightly different redshifts. So can one draw the conclusion that they are two separate galaxies after all?

  Posted January 24, 2016 9:17 PM

• by Budgieye moderator

  It looks like a runner in a relay race, holding a baton.

  Posted January 25, 2016 5:58 AM

• by Budgieye moderator

  Somtimes it helps to zoom out and see what else is happening nearby. There is a galaxy nearby with the same z

  

  

  http://skyserver.sdss.org/dr9/en/tools/explore/obj.asp?ra=337.5089392337872&dec=-0.286940992726936 1237663478723772715

  spectrum z .082 zErr 0.00002

  

  http://skyserver.sdss.org/dr9/en/tools/explore/obj.asp?id=1237663478723772734 1237663478723772734

  z zErr
  0.082 0.00002

  Posted January 25, 2016 6:06 AM

• by CeciliaB in response to Budgieye's comment.

  Thanks, Budgieye! I suppose it´s not easy to decide what the blue/pink bar is (which was the start of this discussion). The fact that an object has a spectrum and a redshift may not necessarily mean that it is a galaxy? The only option left then is just guessing. (Your guess is as good as mine!) 😄

  Posted January 25, 2016 3:31 PM

• by Budgieye moderator

  My educated guess.....The hot oxygen means that is is made of exploding stars, and those are found in galaxies with a lot of star formation. It also has hot hydrogen, very hot since it goes to hydrogen delta emission line.

  From NGC3314: "Normal stars have either no emission lines or emission
  lines so weak that they do not show up in data of this spectral
  sampling. Emission lines generally come from excited gas, either:

  gas illuminated by hot stars,

  gas outflowing from stars,

  gas shocked by supernova explosions, or

  gas lit up by the hot surroundings of a black hole."

  gas heated by merging of galaxies

  I think the hot hydrogen might come from several sources, maybe from gas illuminated by hot stars. Possibly the arm fragment is being hit by a relativistic jet from the upper galaxy, though I think it is the wrong colour for that.

  http://skyservice.pha.jhu.edu/DR9/ImgCutout/getjpeg.aspx?ra=337.50933944&dec=-0.29142649&scale=0.2&width=200&height=200&opt=G

  

  http://skyserver.sdss.org/dr9/en/get/specById.asp?id=757770255996053504

  http://skyserver.sdss.org/dr9/en/tools/explore/obj.asp?id=1237663478723772717

  SDSSCGB 44907.04

  

  Posted January 25, 2016 10:23 PM

• by CeciliaB in response to Budgieye's comment.

  Thank you, Budgieye for your information and interesting analysis 😄

  I´m trying to learn more and find it very inspiring to read about different subjects in your ' Index for Galaxy Zoo Talk '. You have done a great job with that! 😄

  Posted January 26, 2016 2:53 PM

• by Budgieye moderator

  Thank you 😃 😃 😃

  Now I think it looks like a warrior with shield and magic sword.

  Posted January 27, 2016 7:55 AM

• by Ghost_Sheep_SWR

  😃 once you see it.... 😃

  

  Posted January 27, 2016 4:56 PM