RT journal article
T1 IC 4665 DANCe I. Members, empirical isochrones, magnitude distributions, present-day system mass function, and spatial distribution
A1 Miret-Roig, N.
A1 Bouy, H.
A1 Olivares, J.
A1 Sarro, L.M.
A1 Tamura, M.
A1 Allen, L.
A1 Bertin, E.
A1 Serre, S.
A1 Berihuete Macías, Ángel
A1 Beletsky, Y.
A1 Barrado, D.
A1 Huélamo, N.
A1 Cuillandre, J.-C.
A1 Moraux, E.
A1 Bouvier, J.
A2 Estadística e Investigación Operativa
K1 proper motions
K1 stars: luminosity function, mass function
K1 mass function
K1 open clusters and associations: individual: IC 4665
K1 stars: low-mass
AB Context. The study of star formation is extremely challenging, due to the lack of complete and clean samples of young nearby clustersand star-forming regions. The recent Gaia DR2 catalogue complemented with the deep ground-based COSMIC DANCe catalogueo ers a new database of unprecedented accuracy to revisit the membership of clusters and star-forming regions. The 30 Myr opencluster IC 4665 is one of the few well-known clusters of this age and it is an excellent target where evolutionary models can be testedand planetary formation studied.Aims. We provide a comprehensive membership analysis of IC 4665 and study the following properties: empirical isochrones, distance,magnitude distribution, present-day system mass function, and spatial distribution.Methods. We used the Gaia DR2 catalogue together with the DANCe catalogue to look for members via a probabilistic model of thedistribution of the observable quantities in both the cluster and background populations.Results. We obtained a final list of 819 candidate members that cover a 12.4 magnitude range (7 < J < 19:4). We find that 50%are new candidates, and we estimate a conservative contamination rate of 20%. This unique sample of members allows us to obtaina present-day system mass function in the range of 0.02–6 M , which reveals a number of details not seen in previous studies. Inaddition, we find that a spherically symmetric spatial distribution is favoured by our final list of members for this young open cluster.Conclusions. Our membership analysis represents a significant increase in the quantity and quality (low contamination) with respectto previous studies. It o ers an excellent opportunity to revisit other fundamental parameters such as age.
PB EDP SCIENCES S A
SN 0004-6361
YR 2019
FD 2019-10
LK http://hdl.handle.net/10498/22000
UL http://hdl.handle.net/10498/22000
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 12-nov-2026