The abundance and spatial distribution of ultra-diffuse galaxies in nearby galaxy clusters

Remco F. J. van der Burg; Adam Muzzin; Henk Hoekstra

doi:10.1051/0004-6361/201628222

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Volume 590 (June 2016)

A&A, 590 (2016) A20

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Table 2

Parameters that are used to select the sample of UDG candidates.

Parameter	Requirement	Total discarded^a	Unique discarded^b

⟨ μ(r,r_eff) ⟩	≥24.0 mag arcsec^-2	19 328	4043
⟨ μ(r,r_eff) ⟩	≤26.5 mag arcsec^-2	15 399	604
r _eff	≥1.5 kpc	26 268	10 007
r _eff	≤7.0 kpc	8287	43
distSEx^c	≤7.0 pix	932	122
Sérsic-n	≤4.0	19 158	1186

Notes. Shown are the total numbers of rejected objects for the different selection criteria (combining all eight clusters).

^(a)

Total number of sources that do not meet this criterion.

^(b)

Number of sources that do not meet this criterion, but do meet all others.

^(c)

Distance between best-fitting GALFIT position and the input position obtained using SExtractor (1 pix =ˆ 0.185′′). If this difference is too large it is generally a sign that the GALFIT fit was unstable.

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