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Astro2020 Science White Paper: Dynamical Processes in the Planet-Forming Environment
Peregrine McGehee, Alan Boss, Laird Close +3
The transfer of circumstellar disk mass and momentum onto the protostar and out into the environment occurs via a variety of mechanisms including magnetospheric accretion, jets, ou…
Triggering Collapse of the Presolar Dense Cloud Core and Injecting Short-Lived Radioisotopes with a Shock Wave. VI. Protostar and Protoplanetary Disk Formation
Alan P. Boss
Cosmochemical evaluations of the initial meteoritical abundance of the short-lived radioisotope (SLRI) Al have remained fairly constant since 1976, while estimates for the i…
Dynamical Masses of Eps Ind B and C: Two Massive Brown Dwarfs at the Edge of the Stellar-Substellar Boundary
Sergio B. Dieterich, Alycia J. Weinberger, Alan P. Boss +6
We report individual dynamical masses for the brown dwarfs Epsilon Indi B and C, which have spectral types of T1.5 and T6, respectively, measured from astrometric orbit mapping. Ou…
New Parallaxes for the Upper Scorpius OB Association
Jessica Donaldson, Alycia Weinberger, Jonathan Gagné +2
Upper Scorpius is a subgroup of the nearest OB association, Scorpius--Centaurus. Its young age makes it an important association to study star and planet formation. We present para…
Triggering Collapse of the Presolar Dense Cloud Core and Injecting Short-Lived Radioisotopes with a Shock Wave. V. Nonisothermal Collapse Regime
Alan P. Boss
Recent meteoritical analyses support an initial abundance of the short-lived radioisotope Fe that may be high enough to require nucleosynthesis in a core collapse supernova,…
Trigonometric Parallaxes and Proper Motions of 134 Southern Late M, L, and T Dwarfs from the Carnegie Astrometric Planet Search Program
A. J. Weinberger, A. P. Boss, S. A. Keiser +3
We report trigonometric parallaxes for 134 low mass stars and brown dwarfs, of which 38 have no previously published measurement and 79 more have improved uncertainties. Our survey…