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Dynamical Surface Imaging of lambda Andromedae
Arturo O. Martinez, Fabien R. Baron, John D. Monnier +2
We present temperature maps of RS CVn star lambda Andromedae, reconstructed from interferometric data acquired in 2010 and 2011 by the MIRC instrument at the Center for High Angula…
First Images of Cool Starspots on a Star Other than the Sun: Interferometric Imaging of Andromedae
J. R. Parks, R. J. White, F. Baron +14
Presented are the first interferometric images of cool starspots on the chromospherically active giant Andromedae. These images represent the first model-independent images of…
YSOVAR: Mid-IR variability in the star forming region Lynds 1688
H. M. Günther, A. M. Cody, K. R. Covey +14
The emission from young stellar objects (YSOs) in the mid-IR is dominated by the inner rim of their circumstellar disks. We present an IR-monitoring survey of about 800 objects in…
Periodic and Aperoidic Variability in the Molecular Cloud ρOphiuchus
J. R. Parks, P. Plavchan, R. J. White +1
Presented are the results of a near-IR photometric survey on 1678 stars in the direction of the ρOphiuchus (ρOph) star forming region using data from the 2MASS Calibration Database…
The Identification of 93 Day Periodic Photometric Variability for YSO YLW 16A
Peter Plavchan, Tina Gueth, Nadanai Laohakunakorn +1
Periodic variability in young stellar objects (YSOs) offers indirect evidence for an active dynamical mechanism. Starspots, accretion, stellar companions, and disk veiling can cont…
The H-band Emitting Region of the Luminous Blue Variable P Cygni: Spectrophotometry and Interferometry of the Wind
N. D. Richardson, G. H. Schaefer, D. R. Gies +20
We present the first high angular resolution observations in the nearinfrared H-band (1.6 microns) of the Luminous Blue Variable star P Cygni. We obtained six-telescope interferome…