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51 papers · 2 filters
The ALMA Early Science View of FUor/EXor objects. II. The Very Wide Outflow Driven by HBC 494
D. Ruíz-Rodríguez, L. A. Cieza, J. P. Williams +10
We present Atacama Large Millimeter/sub-millimeter Array (ALMA) Cycle-2 observations of the HBC 494 molecular outflow and envelope. HBC 494 is an FU Ori-like object embedded in the…
Kinematics of a young low-mass star forming core: Understanding the evolutionary state of the First Core Candidate L1451-mm
Maria Jose Maureira, Hector Arce, Michael M. Dunham +4
We use 3mm multi-line and continuum CARMA observations towards the first hydrostatic core (FHSC) candidate L1451-mm to characterize the envelope kinematics at 1000 AU scales and in…
Characterization of the inner disk around HD 141569 A from Keck/NIRC2 L-band vortex coronagraphy
Dimitri Mawet, Élodie Choquet, Olivier Absil +22
HD 141569 A is a pre-main sequence B9.5 Ve star surrounded by a prominent and complex circumstellar disk, likely still in a transition stage from protoplanetary to debris disk phas…
SALT observations of the Chromospheric Activity of Transiting Planet Hosts: Mass Loss and Star Planet Interactions
D. Staab, C. A. Haswell, Gareth D. Smith +4
We measured the chromospheric activity of the four hot Jupiter hosts WASP-43, WASP-51/HAT-P-30, WASP-72 & WASP-103 to search for anomalous values caused by the close-in companions.…
Recovering planet radial velocity signals in the presence of starspot activity in fully convective stars
J. R. Barnes, S. V. Jeffers, G. Anglada-Escude +6
Accounting for stellar activity is a crucial component of the search for ever-smaller planets orbiting stars of all spectral types. We use Doppler imaging methods to demonstrate th…
The Proper Motions of the Double Radio Source n in the Orion BN/KL Region
Luis F. Rodriguez, Sergio A. Dzib, Laurent Loinard +4
We have extended the time baseline for observations of the proper motions of radio sources in the Orion BN/KL region from 14.7 to 22.5 years. We present improved determinations for…