Results 11 to 20 of about 2,956 (261)
The Demographics of Long‐Period Comets [PDF]
Astrophysical Journal, 2005 Accepted for publication in Astrophysical Journal.
Paul J Francis
exaly +5 more sources
Long-period comets with non-gravitational effects [PDF]
Astronomy and Astrophysics, 2004 Summary: The influence of non-gravitational effects on the motion of long-period comets is analyzed. Investigations were performed for about 60 nearly-parabolic comets discovered during the last thirty years. All three non-gravitational parameters \(A_1, A_2, A_3\) were detected in the motion of 19 comets on the basis of positional observations only ...
M. Królikowska
exaly +4 more sources
Water Production Activity of Nine Long-Period Comets from SOHO/SWAN Observations of Hydrogen Lyman-alpha: 2013-2016. [PDF]
Icarus, 2018 International audienceNine recently discovered long-period comets were observed by the Solar Wind Anisotropies (SWAN) Lyman-alpha all-sky camera on board the Solar and Heliosphere Observatory (SOHO) satellite during the period of 2013 to 2016. These were
Combi MR +6 more
europepmc +3 more sources
Breakup of a long-period comet as the origin of the dinosaur extinction [PDF]
Scientific Reports, 2021 The origin of the Chicxulub impactor, which is attributed as the cause of the K/T mass extinction event, is an unsolved puzzle. The background impact rates of main-belt asteroids and long-period comets have been previously dismissed as being too low to ...
Amir Siraj, Abraham Loeb
doaj +4 more sources
Destruction of Long-period Comets
The Astronomical Journal, 2022 Abstract We identify a sample of 27 long-period comets for which both nongravitational accelerations and Lyα-based gas production rates are available. Seven of the 27 comets (i.e., ∼25%) did not survive perihelion because of nucleus fragmentation or complete disintegration.
Jewitt, David
openaire +3 more sources
Finding the imprints of stellar encounters in long-period comets [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 The solar system's Oort cloud can be perturbed by the Galactic tide and by individual passing stars. These perturbations can inject Oort cloud objects into the inner parts of the solar system, where they may be observed as the long-period comets (periods longer than 200 years).
Feng, Fabo, Bailer-Jones, C. A. L.
openaire +4 more sources
The Evolution of Long-Period Comets [PDF]
Icarus, 1999 We study the evolution of long-period comets by numerical integration of their orbits, following comets from their origin in the Oort cloud until their final escape or destruction, in a model solar system consisting of the Sun, the four giant planets and the Galactic tide.
Paul Wiegert, Scott Tremaine
exaly +3 more sources
Distribution of long-period comets: comparison between simulations and observations [PDF]
Astronomy & Astrophysics, 2017 Aims. This paper is devoted to a comparison between observations and simulations of the so-called Oort spike formed by the “new” observable long-period comets. Methods. The synthetic distributions of observable comets come from the propagation of a huge sample of objects during the age of the solar system that were initially in a proto-Oort ...
Fouchard M +3 more
openaire +4 more sources
The end states of long-period comets and the origin of Halley-type comets [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 34 pages, 17 figures, article in ...
Tabare Gallardo +2 more
exaly +3 more sources
How Meteor Showers Can Guide the Search for Long-period Comets
The Planetary Science JournalWith orbital periods longer than 200 yr, most long-period comets (LPCs) remain undiscovered until they are in-bound toward perihelion. The comets that pass close to Earth’s orbit are potentially hazardous objects.
Samantha Hemmelgarn +3 more
doaj +3 more sources