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Potential Drivers of Mid-Infrared Variability in Young Stars: testing physical models with multi-epoch near-infrared spectra of YSOs in ρ Oph
Christopher M. Faesi, Kevin R. Covey, Robert Gutermuth +6
Recent studies have identified several young stellar objects (YSOs) which exhibit significant mid-infrared (mid-IR) variability. A wide range of physical mechanisms may be responsi…
Keck/NIRC2 Imaging of the Warped, Asymmetric Debris Disk around HD 32297
Thayne Currie, Timothy J. Rodigas, John Debes +8
We present Keck/NIRC2 band high-contrast coronagraphic imaging of the luminous debris disk around the nearby, young A star HD 32297 resolved at a projected separation of $r…
Direct Detection and Orbit Analysis of the Exoplanets HR 8799 bcd from Archival 2005 Keck/NIRC2 Data
Thayne Currie, Misato Fukagawa, Christian Thalmann +2
We present previously unpublished July 2005 -band coronagraphic data of the young, planet-hosting star HR 8799 from the newly-released Keck/NIRC2 archive. Despite poor observing…
YSOVAR: Six pre-main-sequence eclipsing binaries in the Orion Nebula Cluster
M. Morales-Calderón, J. R. Stauffer, K. G. Stassun +17
Eclipsing binaries (EBs) provide critical laboratories for empirically testing predictions of theoretical models of stellar structure and evolution. Pre-main-sequence (PMS) EBs are…
Hubble Space Telescope Observations of the HD 202628 Debris Disk
John E. Krist, Karl R. Stapelfeldt, Geoffrey Bryden +1
A ring-shaped debris disk around the G2V star HD 202628 (d = 24.4 pc) was imaged in scattered light at visible wavelengths using the coronagraphic mode of the Space Telescope Imagi…
The PTF Orion Project: a Possible Planet Transiting a T-Tauri Star
Julian C. van Eyken, David R. Ciardi, Kaspar von Braun +35
We report observations of a possible young transiting planet orbiting a previously known weak-lined T-Tauri star in the 7-10 Myr old Orion-OB1a/25-Ori region. The candidate was fou…