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Euclid Early Release Observations of the Barnard 30 dark cloud I. Brown dwarfs and planetary mass candidate members at the core of the association
D. Barrado, H. Bouy, E. L. Martin +8
This study aims to identify very low-mass members within the Barnard 30 dark cloud, with a particular focus on detecting objects in the substellar domain, including those within th…
Euclid: The convective-transition gap of 47 Tuc
M. Libralato, M. Griggio, R. Gerasimov +140
We report the first detection of the `convective-transition gap' (also known as `M-dwarf gap') in the globular cluster 47 Tuc (NGC 104) thanks to Euclid data. This feature, linked…
Free-floating planetary mass objects in LDN 1495 from Euclid Early Release Observations
H. Bouy, E. L. Martín, J. -C. Cuillandre +8
Context. Substellar objects, including brown dwarfs and free-floating planetary-mass objects, are a significant product of star formation. Their sensitivity to initial conditions a…
Euclid: High-precision imaging astrometry and photometry from Early Release Observations. I. Internal kinematics of NGC 6397 by combining Euclid and Gaia data
M. Libralato, L. R. Bedin, M. Griggio +175
The instruments at the focus of the Euclid space observatory offer superb, diffraction-limited imaging over an unprecedented (from space) wide field of view of 0.57 deg. This e…
Infrared Spectroscopy of free-floating planet candidates in Upper Scorpius and Ophiuchus
H. Bouy, M. Tamura, D. Barrado +15
Context: A rich population of low-mass brown dwarfs and isolated planetary mass objects has been reported recently in the Upper Scorpius and Ophiuchus star forming complex. Aims: W…
Proper motion survey and kinematic analysis of the Rho Ophiuchi embedded cluster
C. Ducourant, R. Teixeira, A. Krone-Martins +7
We aim at performing a kinematic census of young stellar objects (YSOs) in the Rho Ophiuchi F core and partially in the E core of the L1688 dark cloud. We run a proper motion progr…
The seven sisters DANCe.II. Proper motions and the lithium-rotation-activity connection for G and K Pleiads
D. Barrado, H. Bouy, J. Bouvier +7
Stellar clusters are open windows to understand stellar evolution. Specifically, the change with time and the dependence on mass of different stellar properties. As such, they are…
Cygnus OB2 DANCe: A high precision proper motion study of the Cygnus OB2 association
Nicholas J. Wright, Herve Bouy, Janet E. Drew +4
We present a high-precision proper motion study of 873 X-ray and spectroscopically selected stars in the massive OB association Cygnus OB2 as part of the DANCe project. These were…
YSOVAR: Mid-Infrared Variability in NGC 1333
L. M. Rebull, J. R. Stauffer, A. M. Cody +17
As part of the Young Stellar Object VARiability (YSOVAR) program, we monitored NGC 1333 for ~35 days at 3.6 and 4.5 um using the Spitzer Space Telescope. We report here on the mid-…
Messier 35 (NGC2168) DANCe I. Membership, proper motions and multi-wavelength photometry
H. Bouy, E. Bertin, D. Barrado +7
We aim at identifying the cluster's members by deriving membership probabilities for the sources within 1 degree of the cluster's center, going further away than equivalent previou…
Mapping accretion and its variability in the young open cluster NGC 2264: a study based on u-band photometry
Laura Venuti, Jérôme Bouvier, Ettore Flaccomio +9
We aim at characterizing the accretion properties of several hundred members of the star-forming cluster NGC 2264 (3 Myr). We performed a deep u,g,r,i mapping and a simultaneous u+…
Cluster membership probabilities from proper motions and multiwavelength photometric catalogues: I. Method and application to the Pleiades cluster
L. M. Sarro, H. Bouy, A. Berihuete +6
We present a new technique designed to take full advantage of the high dimensionality (photometric, astrometric, temporal) of the DANCe survey to derive self-consistent and robust…
Searching for planetary-mass T-dwarfs in the core of Serpens
L. Spezzi, C. Alves de Oliveira, E. Moraux +5
We searched for isolated planetary-mass T-dwarfs in the 3Myr old Serpens Core cluster. We performed a deep imaging survey of the central part of this cluster using the WIRCam camer…