Publications (6)
NeBula: Quest for Robotic Autonomy in Challenging Environments; TEAM CoSTAR at the DARPA Subterranean Challenge
Ali Agha, Kyohei Otsu, Benjamin Morrell +69
This paper presents and discusses algorithms, hardware, and software architecture developed by the TEAM CoSTAR (Collaborative SubTerranean Autonomous Robots), competing in the DARP…
Chemical Composition in the Globular Cluster M71 from Keck/HIRES Spectra of Turn-Off Stars
Ann Merchant Boesgaard, Jeremy R. King, Ann Marie Cody +2
We have made observations with the Keck I telescope and HIRES at a resolution of 45,000 of five nearly identical stars at the turn-off of the metal-rich globular cluster M 71…
LAMP: Large-Scale Autonomous Mapping and Positioning for Exploration of Perceptually-Degraded Subterranean Environments
Kamak Ebadi, Yun Chang, Matteo Palieri +9
Simultaneous Localization and Mapping (SLAM) in large-scale, unknown, and complex subterranean environments is a challenging problem. Sensors must operate in off-nominal conditions…
In search of cool flow accretion onto galaxies where does the disk gas end?
Joss Bland-Hawthorn, Phil Maloney, Alex Stephens +2
The processes taking place in the outermost reaches of spiral disks (the 'proto-disk') are intimately connected to the build-up of mass and angular momentum in galaxies. The thinne…
New Keck Observations of Lithium in Very Metal-poor Stars
Ann Merchant Boesgaard, Megan C. Novicki, Alex Stephens
Lithium abundances have been determined in more than 100 metal-poor halo stars both in the field and in clusters. From these data we find trends of Li with both temperature and met…
Lithium and Lithium Depletion in Halo Stars on Extreme Orbits
Ann Merchant Boesgaard, Alex Stephens, Constantine P. Deliyannis
We have determined Li abundances in 55 metal-poor (3.6 < [Fe/H] < -0.7) stars with extreme orbital kinematics. We find the Li abundance in the Li-plateau stars and examine its decr…