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pro vyhledávání: '"Richard, O."'
Autonomous vehicles are suited for continuous area patrolling problems. Finding an optimal patrolling strategy can be challenging due to unknown environmental factors, such as wind or landscape; or autonomous vehicles' constraints, such as limited ba
Externí odkaz:
http://arxiv.org/abs/2402.10222
Variations in chemical abundances with evolutionary phase have been identified among stars in globular and open clusters with a wide range of metallicities. In the metal-poor clusters, these variations compare well with predictions from stellar struc
Externí odkaz:
http://arxiv.org/abs/2312.09657
Autor:
Gray, Richard O., Corbally, Christopher J., Briley, Michael M., McKay, Adam, Sims, Forrest, Boyd, David, Boussin, Christophe, McGahee, Courtney E., Buchheim, Robert, Walker, Gary, Iadevaia, David, Fernandez, David Cejudo, Lemay, Damien, Martin, Jack, Grubb, Jim, Stiewing, Albert, Daglen, Joseph, Shank, Keith, Andrews, Sydney, Barnhardt, Nick, Clark, Rebekah, Corman, Hunter, Gomes, Sabina, Jonnalagadda, Agastya, McDaries, Theo, Mills, Ava, Newsom, Will, Slate, Andrew, Watts, Michael
Publikováno v:
Astronomical Journal 166, 161-170 (2023)
TU Tau (= HD 38218 = HIP 27135) is a binary system consisting of a C-N carbon star primary and an A-type secondary. We report on new photometry and spectroscopy which tracked the recent disappearance of the A-star secondary. The dimming of the A-star
Externí odkaz:
http://arxiv.org/abs/2308.10972
Autor:
Ebel, Denton S., Sack, Richard O.
Publikováno v:
Contributions to Mineralogy and Petrology 166: 923-934 (2013)
Djerfisherite is an important carrier of potassium in highly reduced enstatite chondrites, where it occurs in sub-round metal-sulfide nodules. These nodules were once free-floating objects in the protoplanetary nebula. Here, we analyze existing and n
Externí odkaz:
http://arxiv.org/abs/2308.03206
The popularity of online social networks has enabled rapid dissemination of information. People now can share and consume information much more rapidly than ever before. However, low-quality and/or accidentally/deliberately fake information can also
Externí odkaz:
http://arxiv.org/abs/2307.12639