Hi Sedat, this my attempt
First a small crop to eliminate black borders

HE let you see what happens in background. There are gradients and vertical lines.

ABE

DBE

There are still vertical lines

For vertical lines rotate 90º and apply CBR

Rotate 90º back and new DBE

Whit AberrationInspector create a new image to be used as Reference image in BN


With AberrationInpector create a new image to be used as Reference image in CC and a preview of the galaxy as Reference image

Generate a PSF and a Star Mask to be used in Deconvolution, apply protecting stars with star mask.


HT


Generate a LMask

Apply SCNR (without mask)

Apply ACDNR to Chrominance (without mask)

ColorSaturation with LMask protecting background

HDRMT

HDRMT

New starmask to be used with MMT

MMT protecting stars with starmask

CT

CT protecting background with Blue channel

HT

MMT

Final image:

Full image:
http://endor.uv.es//data/public/ce7867e95bfd2f127f952513eba96932.php?lang=en