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WISE Circumstellar Disks in the Young Sco-Cen Association
Aaron C. Rizzuto, Michael J. Ireland, Daniel B. Zucker
We present an analysis of the WISE photometric data for 829 stars in the Sco-Cen OB2 association, using the latest high-mass membership probabilities. We detect infrared excesses a…
LkCa 15: A Young Exoplanet Caught at Formation?
Adam L. Kraus, Michael J. Ireland
Young and directly imaged exoplanets offer critical tests of planet-formation models that are not matched by RV surveys of mature stars. These targets have been extremely elusive t…
A Disk Around the Planetary-Mass Companion GSC 06214-00210 b: Clues About the Formation of Gas Giants on Wide Orbits
Brendan P. Bowler, Michael C. Liu, Adam L. Kraus +2
We present Keck/OSIRIS 1.1-1.8 um adaptive optics integral field spectroscopy of the planetary-mass companion to GSC 06214-00210, a member of the ~5 Myr Upper Scorpius OB associati…
The Role of Multiplicity in Disk Evolution and Planet Formation
Adam L. Kraus, Michael J. Ireland, Lynne A. Hillenbrand +1
The past decade has seen a revolution in our understanding of protoplanetary disk evolution and planet formation in single star systems. However, the majority of solar-type stars f…
Dynamical Opacity-Sampling Models of Mira Variables. II: Time-Dependent Atmospheric Structure and Observable Properties of 4 M-Type Model Series
Michael J. Ireland, Michael Scholz, Peter R. Wood
We present 4 model series of the CODEX dynamical opacity-sampling models of Mira variables with solar abundances, designed to have parameters similar to Cet, R Leo and R Cas. W…
Sparse aperture masking at the VLT I. Faint companion detection limits for the two debris disk stars HD 92945 and HD 141569
S. Lacour, P. Tuthill, P. Amico +4
Observational data on companion statistics around young stellar systems is needed to flesh out the formation pathways for extrasolar planets and brown dwarfs. Aperture masking is a…