Searching for debris discs in the 30 Myr open cluster IC 4665
arXiv:2007.04992 · doi:10.1051/0004-6361/202038205
Abstract
Context: Debris discs orbiting young stars are key to understand dust evolution and the planetary formation process. We take advantage of a recent membership analysis of the 30 Myr nearby open cluster IC 4665 based on the Gaia and DANCe surveys to revisit the disc population of this cluster. Aims: We aim to study the disc population of IC 4665 using Spitzer (MIPS and IRAC) and WISE photometry. Methods: We use several colour-colour diagrams with empirical photospheric sequences to detect the sources with an infrared excess. Independently, we also fit the spectral energy distribution (SED) of our debris disc candidates with the Virtual Observatory SED analyser (VOSA) which is capable of automatically detecting infrared excesses and provides effective temperature estimates. Results: We find six candidates debris disc host-stars (five with MIPS and one with WISE) and two of them are new candidates. We estimate a disc fraction of 2410\% for the B-A stars, where our sample is expected to be complete. This is similar to what has been reported in other clusters of similar ages (Upper Centaurus Lupus, Lower Centaurus Crux, the Pictoris moving group, and the Pleiades). For solar type stars we find a disk fraction of 99%, lower than that observed in regions with comparable ages. Conclusions: Our candidates debris disc host-stars are excellent targets to be studied with ALMA or the future James Webb Space Telescope (JWST).
arXiv commentAccepted for publication in A&A
References in corpus (30)
- Astropy: A Community Python Package for Astronomy
- Gaia Data Release 2. Summary of the contents and survey properties
- The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
- The Gaia mission
- Direct Imaging of Multiple Planets Orbiting the Star HR 8799
- A 3D Dust Map Based on Gaia, Pan-STARRS 1 and 2MASS
- A new generation of PARSEC-COLIBRI stellar isochrones including the TP-AGB phase
- A giant planet imaged in the disk of the young star Beta Pictoris
- Optical Images of an Exosolar Planet 25 Light Years from Earth
- VOSA: Virtual Observatory SED Analyzer. An application to the Collinder 69 open cluster
- Gaia Data Release 2: first stellar parameters from Apsis
- Debris Disks: Structure, Composition, and Variability
- The Tucana/Horologium, Columba, AB Doradus, and Argus Associations: New Members and Dusty Debris Disks
- Characterization of Dusty Debris Disks: the IRAS and Hipparcos Catalogs
- Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18
- Nearby debris disk systems with high fractional luminosity reconsidered
- New Debris Disks Around Young, Low Mass Stars Discovered With The Spitzer Space Telescope
- Spitzer 24 Micron Observations of Open Cluster IC 2391 and Debris Disk Evolution of FGK Stars
- Dynamical Analysis of Nearby ClustErs. Automated astrometry from the ground: precision proper motions over wide field
- Spitzer 24 micron Survey of Debris Disks in the Pleiades
- Debris Disks in NGC 2547
- An XMM-Newton observation of the young open cluster NGC 2547: coronal activity at 30 Myr
- Detection of the lithium depletion boundary in the young open cluster IC 4665
- Low-mass members of the young cluster IC 4665 and pre-main-sequence lithium depletion
- Exploring the Lower Mass Function in the young open Cluster IC 4665
- The first 40 million years of circumstellar disk evolution: the signature of terrestrial planet formation
- Debris discs in the 27 Myr old open cluster IC4665
- The mass function of IC4665 revisited by the UKIDSS Galactic Clusters Survey
- Debris Disks of Members of the Blanco 1 Open Cluster
- IC 4665 DANCe I. Members, empirical isochrones, magnitude distributions, present-day system mass function, and spatial distribution