I am asking the following questions, regarding computing surface brightness and other photometrical quantities using FITS files of galaxies, because I didn't find an answer through the FAQs and the whole forum, but I apologize if they have been already discussed.
In Torrey+15, at subsection 2.2.4 it is written:
"Images are produced by projecting the stellar light using pinhole cameras with a resolution of Npixels × Npixels pixels. We use a fiducial value of Npixels = 256 for the full image catalog. However, we have used higher pixel resolution (Npixels = 512) for many of the individual images included in this paper."
So I'm asking:
Thank you, regards.
thanks for your answer, it actually helped more than expected.
Thanks a lot, kind regards.
If you are making 1D radial surface brightness profiles, then you're right this should be doable and no need to worry about smoothing until you get to quite large distances from the galaxy center - there you will start to see noise in the profiles due to the small number statistics of the star particles in each bin. You can then either smooth these over multiple bins, truncate the profile, or do an adaptive/increasing bin size.