In this Letter we revisit the relationship between the fraction of the
intra-cluster light (ICL) and both the virial mass and the fraction of Early
Type Galaxies in the host halo. This is based on a statistically significant
and homogeneous sample of 22 groups and clusters of galaxies in the local
Universe (z≤0.05), obtained with the VST Early-type GAlaxy Survey
(VEGAS). Taking advantage of the long integration time and large area of the
VEGAS images, we are able to map the galaxy outskirts and ICL down to μg​≥ 29-30 mag/arcsec2 and out to hundreds of kpc. With this data-set, we
have expanded the sample of ICL measurements, doubling the previous measures
available from the literature for z ≤ 0.05. The main result of this work
is the lack of any significant trend between the fraction of ICL and the virial
mass of the host environment, covering a wide range of virial masses ( ∼1012.5≤Mvir​≤1015.5M⊙​), in agreement with some
theoretical studies. Since the new data points are all derived with the same
methodology and from the same observational setup, and all have comparable
depth, the large observed scatter indicates an intrinsic variation in the ICL
fraction.On the other hand, there is a weak relation between the fraction of
ICL and the fraction of Early Type Galaxies in the host halo, where a larger
fraction of ICL is found in groups and clusters of galaxies dominated by
earlier morphological types, indicating a connection between the ICL and the
dynamical state of the host system.Comment: Letter to the editor, accepted for publication in A&A. 8 pages, 3
figure