Results 31 to 40 of about 3,231,447 (290)

Impact Rates in the Outer Solar System

The Planetary Science Journal, 2023
Previous studies of cometary impacts in the outer solar system used the spatial distribution of ecliptic comets (ECs) from dynamical models that assumed ECs began on low-inclination orbits (≲5°) in the Kuiper Belt.
David Nesvorný, Luke Dones, Mario De Prá, Maria Womack, Kevin J. Zahnle   +4 more
doaj   +1 more source

Problems of the dynamics and the origin of comets [PDF]

Astronomical School’s Report, 2000
We consider some problems concerning the dynamics of comets far from the Sun. In this connection an estimate for the different hypotheses of the comet origin is given.
openaire   +2 more sources

Progress towards COMET Phase-I [PDF]

, 2015
The COMET experiment is designed to search for flavour violation in the charged lepton sector, via the coherent neutrinoless process +A e+A, which can probe a wide variety of BSM physics. Using the new high-power proton beam at J-PARC, the sensitivity of
COMET Collaboration, ., Litchfield, R. Phillip   +1 more
core   +1 more source

The effect of the impact of comet Shoemaker Levy‐9 on Jupiter's aurorae [PDF]

, 1995
We present infrared spectra and images of the jovian aurorae taken at wavelengths sensitive to the H-3(+) molecular ion during the period around the impact of Comet Shoemaker Levy-9.
Tennyson, J., BAINES, K, Baines, K., JOSEPH, RD, BROOKE, TY, Dinelli, B. M., GEBALLE, TR, Lam, H. A., DINELLI, BM, Geballe, T. R., TRAFTON, LM, TENNYSON, J, JAGOD, MF, Miller, S., Brooke, T. Y., ACHILLEOS, N, Joseph, R. D., Orton, G., BALLESTER, GE, Trafton, L. M., MILLER, S, LAM, HA, ORTON, G, Jagod, M.‐f., Ballester, G. E., Achilleos, N.   +25 more
core   +1 more source

Cometary Dynamics—Formation and Evolution of the Oort Cloud

Astronomy
In this review, the formation of the Oort Cloud is illuminated from several aspects. One is the history of the subject with an outline of the fundamental discoveries by Öpik, Oort and Hills. It is argued that the basic reason for judging Oort as the real
Hans Rickman
doaj   +1 more source

InSAR Time Series Analysis of L-Band Data for Understanding Tropical Peatland Degradation and Restoration

Remote Sensing, 2019
In this study, satellite radar observations are employed to reveal spatiotemporal changes in ground surface height of peatlands that have, and have not, undergone restoration in Central Kalimantan, Indonesia.
Zhiwei Zhou, Zhenhong Li, Susan Waldron, Akiko Tanaka   +3 more
doaj   +1 more source

Determination of double- and single-stranded DNA breaks in bovine sperm is predictive of their fertilizing capacity

Journal of Animal Science and Biotechnology, 2022
Background The analysis of chromatin integrity has become an important determinant of sperm quality. In frozen-thawed bovine sperm, neither the sequence of post-thaw injury events nor the dynamics of different types of sperm DNA breaks are well ...
Jordi Ribas-Maynou, Ariadna Delgado-Bermúdez, Yentel Mateo-Otero, Estel Viñolas, Carlos O. Hidalgo, W. Steven Ward, Marc Yeste   +6 more
doaj   +1 more source

The Dust-to-Gas Ratio, Size Distribution, and Dust Fall-Back Fraction of Comet 67P/Churyumov-Gerasimenko: Inferences From Linking the Optical and Dynamical Properties of the Inner Comae

Frontiers in Physics, 2020
In this work, we present results that simultaneously constrain the dust size distribution, dust-to-gas ratio, fraction of dust re-deposition, and total mass production rates for comet 67P/Churyumov-Gerasimenko.
Raphael Marschall, Johannes Markkanen, Selina-Barbara Gerig, Selina-Barbara Gerig, Olga Pinzón-Rodríguez, Nicolas Thomas, Nicolas Thomas, Jong-Shinn Wu   +7 more
doaj   +1 more source

A Novel Approach to Estimate the Transition Temperature via Dynamic Nanoindentation

Advanced Engineering Materials, EarlyView.
A new dynamic nanoindentation‐based method was developed that uses the stiffness ratio as an indicator of the elastic–plastic deformation contributions at different temperatures. The approach successfully identified transition temperatures in ferritic steel and distinguished them from continuously ductile austenitic steel.
Stefan Zeiler, Nikolaus Kostwein, Ronald Schnitzer, Christian Mitterer, Verena Maier‐Kiener   +4 more
wiley   +1 more source

Predictions of the solar wind interaction with Comet Grigg-Skjellerup [PDF]

, 1992
The planned encounter of the Giotto spacecraft with comet Grigg-Skjellerup on 10th July 1992 promises to extend our knowledge of the solar wind interaction with comets substantially.
Johnstone, AD, Huddleston, DE, Coates, AJ   +2 more
core