Results 31 to 40 of about 93,784 (190)
Bondi-Sachs metrics and Photon Rockets [PDF]
Gen.Rel.Grav.43:2729-2742,2011, 2011 We study the Bondi-Sachs rockets with nonzero cosmological constant. We observe that the acceleration of the systems arises naturally in the asymptotic symmetries of (anti-) de Sitter spacetimes. Assuming the validity of the concepts of energy and mass previously introduced in asymptotically flat spacetimes, we find that the emission of pure radiation ...
arxiv +1 more source
29P/Schwassmann–Wachmann 1, A Centaur in the Gateway to the Jupiter-family Comets [PDF]
Astrophysical Journal, 2019 Jupiter-family comets (JFCs) are the evolutionary products of trans-Neptunian objects (TNOs) that evolve through the giant planet region as Centaurs and into the inner solar system.
G. Sarid +5 more
semanticscholar +1 more source
Origin theories for the eccentricities of extrasolar planets [PDF]
, 2007 Half the known extrasolar planets have orbital eccentricities in excess of 0.3. Such large eccentricities are surprising as it is thought that planets form in a protoplanetary disk on nearly circular orbits much like the current states of the solar ...
Namouni, Fathi
core +3 more sources
Astronomical Journal, 2020 Understanding the cosmogonic record encoded in the parent volatiles stored in cometary nuclei requires investigating whether evolution (thermal or otherwise) has modified the composition of short-period comets during successive perihelion passages.
N. Roth +15 more
semanticscholar +1 more source
The Contribution of Dwarf Planets to the Origin of Jupiter Family Comets [PDF]
Astronomical Journal, 2019 We explore the long-term evolution of a bias-free orbital representation of the cometary nuclei (with diameters above 2 km) of the Kuiper Belt, using the so-called L7 synthetic model from CFEPS, which consists of three dynamical subpopulations: the ...
M. Muñoz-Gutiérrez +4 more
semanticscholar +1 more source
Implications of the small spin changes measured for large Jupiter-family comet nuclei [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Rotational spin-up due to outgassing of comet nuclei has been identified as a possible mechanism for considerable mass-loss and splitting. We report a search for spin changes for three large Jupiter-family comets (JFCs): 14P/Wolf, 143P/Kowal-Mrkos, and ...
R. Kokotanekova +5 more
semanticscholar +1 more source
Back to Basics: A Sanity Check on Modern Time Series Classification Algorithms [PDF]
arXiv, 2023 The state-of-the-art in time series classification has come a long way, from the 1NN-DTW algorithm to the ROCKET family of classifiers. However, in the current fast-paced development of new classifiers, taking a step back and performing simple baseline checks is essential.
arxiv
Project Lyra: Catching 1I/'Oumuamua Realistically with a Jupiter Encounter and Imminent Propulsion Options [PDF]
arXiv, 2023 Any missions to catch 1I/'Oumuamua have the daunting challenge of generating higher hyperbolic excess speeds than the interstellar object's own, i.e. $>$ 26.3 $kms^{-1}$ with respect to the Sun. To accomplish this task using chemical propulsion, previous papers have investigated a Solar Oberth manoeuvre and alternatively a Jupiter Oberth, these options
arxiv
2006 Fragmentation of Comet 73P/Schwassmann-Wachmann 3B Observed with Subaru/Suprime-Cam
, 2009 We analyzed the Subaru/Suprime-Cam images of 73P/Schwassmann-Wachmann 3B and detected no fewer than 154 mini-comets. We applied synchrone-syndyne analysis, modified for rocket effect analysis, to the mini-fragment spatial distribution. We found that most
Ishiguro, Masateru +3 more
core +1 more source
Project Lyra: Another Possible Trajectory to 1I/'Oumuamua [PDF]
arXiv, 2022 The first interstellar object to be discovered, 1I/'Oumuamua, exhibited various unusual properties as it was tracked on its passage through the inner solar system in 2017/2018. In terms of the potential scientific return, a spacecraft mission to intercept and study it in situ would be invaluable.
arxiv