Zobrazeno 61 - 70
of 61 999
pro vyhledávání: '"Metzger, A."'
Tools have been developed to model and simulate the effects of lunar landing vehicles on the lunar environment, mostly addressing the effects of regolith erosion by rocket plumes and the fate of the ejected lunar soil particles. The KSC Granular Mech
Externí odkaz:
http://arxiv.org/abs/2306.04727
Formed in the aftermath of a core-collapse supernova or neutron star merger, a hot proto-neutron star (PNS) launches an outflow driven by neutrino heating lasting for up to tens of seconds. Though such winds are considered potential sites for the nuc
Externí odkaz:
http://arxiv.org/abs/2306.03973
Publikováno v:
J. Aerospace Engineering 33, no.6 (Nov. 2020): 04020075
A physics-based computer model has been developed to support the development of volatile extraction from regolith of the Moon and asteroids. The model is based upon empirical data sets for extraterrestrial soils and simulants, including thermal condu
Externí odkaz:
http://arxiv.org/abs/2306.03776
Autor:
Sayeed, Maryum, Ness, Melissa K., Montet, Benjamin T., Cantiello, Matteo, Casey, Andrew R., Buder, Sven, Bedell, Megan, Breivik, Katelyn, Metzger, Brian D., Martell, Sarah L., McGee-Gold, Leah
Stellar models predict that lithium (Li) inside a star is destroyed during the first dredge-up phase, yet 1.2% of red giant stars are Li-rich. We aim to uncover possible origins of this population, by analysing 1155 Li-rich giants (A(Li) $\geq$ 1.5)
Externí odkaz:
http://arxiv.org/abs/2306.03323
Autor:
Metzger, Philip
Modeling has been developed to support the development of volatile extraction technologies for the Moon, Mars, asteroids, or other bodies. This type of modeling capability is important to avoid the high cost of multiple test campaigns in simulated lu
Externí odkaz:
http://arxiv.org/abs/2306.03164
The first asteroid simulants workshop was held in late 2015. These materials are needed for tests of technologies and mission operational concepts, for training astronauts , for medical studies, and a variety of other purposes. The new program is bas
Externí odkaz:
http://arxiv.org/abs/2306.03068
Autor:
Matthews, D. J., Margutti, R., Metzger, B. D., Milisavljevic, D., Migliori, G., Laskar, T., Brethauer, D., Berger, E., Chornock, R., Drout, M., Ramirez-Ruiz, E.
We present the X-ray monitoring campaign of AT2022tsd in the time range $\delta t_{rest} = 23 - 116$ d rest-frame since discovery. With an initial 0.3-10 keV X-ray luminosity of $L_x \approx 10^{44}$ erg s$^{-1}$ at $\delta t_{rest}\approx$ 23 d, AT2
Externí odkaz:
http://arxiv.org/abs/2306.01114
The Apollo 12 lunar module (LM) landing near the Surveyor III spacecraft at the end of 1969 has remained the primary experimental verification of the predicted physics of plume ejecta effects from a rocket engine interacting with the surface of the m
Externí odkaz:
http://arxiv.org/abs/2306.01087
We have studied several field geotechnical test instruments for their applicability to lunar soil simulants and analog soils. Their performance was evaluated in a series of tests in lunar simulants JSC-1A, NU-LHT-2M, and CHENOBI each prepared in care
Externí odkaz:
http://arxiv.org/abs/2306.01080
Autor:
Immer, Christopher, Metzger, Philip
With NASA's planned return to the moon and possibly with lunar outposts being formed, repeated landings at the same site will be necessary. Understanding rocket plume interaction with lunar and Martian surfaces is of paramount importance in order to
Externí odkaz:
http://arxiv.org/abs/2306.01078