need higher resolution to check if is a minor merger

• by tcwang

  a faint image at the lower right side of the galaxy, need higher resolution.

  Posted August 10, 2016 5:25 AM

• by Budgieye moderator

  Faint object is probably a faint star in our own galaxy. There are other objects around much like it.

  

  http://legacysurvey.org/viewer/jpeg-cutout/?ra=183.7880&dec=0.3688&zoom=16&layer=decals-dr2

  Posted August 10, 2016 8:23 AM

• by Phox in response to tcwang's comment.

  Is overlapping foreground star in own galaxy. Would likely be more debris and deformation from interaction between objects if merger. DECaLS SkyViewer "residuals" option lets you peer beyond miasma of white and get inside them. (not entirely certain what "residuals" displays, but it is darn helpful) (-:

  Posted August 13, 2016 9:07 PM

• by vrooje admin, scientist

  The residual is the result when you subtract the model from the image. If the model were a perfect fit, you'd just see noise. 😃

  Posted August 14, 2016 12:08 AM