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- Center for Astrophysics Harvard & SmithsonianUS152 papers
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51 papers · 1 filter
Evidence for eccentric, precessing gaseous debris in the circumstellar absorption towards WD 1145+017
P. Wilson Cauley, Jay Farihi, Seth Redfield +3
We present time-series spectra revealing changes in the circumstellar line profiles for the white dwarf WD 1145+017. Over the course of 2.2 years, the spectra show complete velocit…
Statistical Design of Chaotic Waveforms with Enhanced Targeting Capabilities
Huanan Li, Suwun Suwunnarat, Tsampikos Kottos
We develop a statistical theory of waveform shaping of incident waves that aim to efficiently deliver energy at weakly lossy targets which are embedded inside chaotic enclosures. O…
Optical and Radio Observations of the T Tauri Binary KH 15D (V582 Mon): Stellar Properties, Disk Mass Limit and Discovery of a CO Outflow
Rachel A. Aronow, William Herbst, A. Meredith Hughes +2
We present VRIJHK photometry of the KH 15D T Tauri binary system for the 2015/16 and 2016/17 observing seasons. For the first time in the modern (CCD) era we are seeing Star B full…
ALMA and VLA Observations of the HD 141569 System
Jacob Aaron White, A. C. Boley, M. A. MacGregor +2
We present VLA 9 mm (33 GHz) observations of the HD 141569 system from semester 16A. The observations achieve a resolution of 0.25 arcsec ( au) and a sensitivity of $4.7~μ\…
Origin of Weak Turbulence in the Outer Regions of Protoplanetary Disks
Jacob B. Simon, Xue-Ning Bai, Kevin M. Flaherty +1
The mechanism behind angular momentum transport in protoplanetary disks, and whether this transport is turbulent in nature, is a fundamental issue in planet formation studies. Rece…
Three Small Super-Earths Transiting the nearby star GJ 9827
Prajwal Niraula, Seth Redfield, Fei Dai +25
We report on the discovery of three transiting planets around GJ~9827. The planets have radii of 1.75, 1.36, and 2.10~…