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The solar system is dusty, and would become dustier over time as asteroids collide and comets disintegrate, except that small debris particles in interplanetary space do not last long. They can be ejected from the solar system by Jupiter,…

Earth and Planetary Astrophysics · Physics 2015-05-30 David Nesvorny , Diego Janches , David Vokrouhlicky , Petr Pokorny , William F. Bottke , Peter Jenniskens

The majority of basaltic objects in the main belt are dynamically connected to Vesta, the largest differentiated asteroid known. Others, due to their current orbital parameters, cannot be easily dynamically linked to Vesta. This is…

Earth and Planetary Astrophysics · Physics 2018-06-13 S. Ieva , E. Dotto , D. Lazzaro , D. Fulvio , D. Perna , E. Mazzotta Epifani , H. Medeiros , M. Fulchignoni

Comets are believed to be born in the outer Solar System where the temperature is assumed to have never exceeded T ~ 100 K. Surprisingly, observations and samples of cometary dust particles returned to Earth showed that they are in fact…

Earth and Planetary Astrophysics · Physics 2015-05-20 Sergei Nayakshin , Seung-Hoon Cha , John Bridges

We review the current state of knowledge of the long-term evolution of the small bodies that give rise to comets and exocomets, as well as their reservoirs. The active cometary phase is only transitory, and bodies that become comets pass…

Observations of massive stars within the central parsec of the Galaxy show that, while most stars orbit within a well-defined disc, a significant fraction have large eccentricities and / or inclinations with respect to the disc plane. Here,…

Astrophysics · Physics 2009-03-08 Jorge Cuadra , Philip J. Armitage , Richard D. Alexander

Suggestions have been made that asteroid belts may be important both for the existence of life and perhaps even for the evolution of complex life on a planet. Using numerical models for protoplanetary discs we calculate the location of the…

Earth and Planetary Astrophysics · Physics 2015-06-12 Rebecca G. Martin , Mario Livio

Chondritic meteorites provide valuable opportunities to investigate the origins of the solar system. We explore impact jetting as a mechanism of chondrule formation and subsequent pebble accretion as a mechanism of accreting chondrules onto…

Earth and Planetary Astrophysics · Physics 2016-03-23 Yasuhiro Hasegawa , Neal J. Turner , Joseph Masiero , Shigeru Wakita , Yuji Matsumoto , Shoichi Oshino

The Oort Cloud, the Kuiper Belt and the Scattered Disk are dynamically distinct populations of small bodies evolving in the outer regions of the Solar System. Whereas their collisional activity is now quiet, gravitational interactions with…

Astrophysics · Physics 2009-03-19 S. Charnoz A. Morbidelli

Asteroids are leftover pieces from the era of planet formation that help us understand conditions in the early Solar System. Unlike larger planetary bodies that were subject to global thermal modification during and subsequent to their…

Earth and Planetary Astrophysics · Physics 2009-06-25 Kevin J. Walsh , Patrick Michel , Derek C. Richardson

Many binary minor planets (BMPs; both binary asteroids and binary Trans-Neptunians objects; TNOs) are known to exist in the Solar system. The currently observed orbital and physical properties of BMPs hold essential information and clues…

Earth and Planetary Astrophysics · Physics 2015-05-18 Smadar Naoz , Hagai B. Perets , Darin Ragozzine

The biological molecules delivered to Earth on the board of meteorites and comets were called one of the possible causes of the origin of life. Therefore, our understanding of the routes of formation of biomolecules in space should shed the…

Earth and Planetary Astrophysics · Physics 2021-03-29 Serge A. Krasnokutski

Jupiter family comets contribute a significant amount of debris to near-Earth space. However, telescopic observations of these objects seem to suggest they have short physical lifetimes. If this is true, the material generated will also be…

Protoplanetary disks are dust-rich structures around young stars. The crystalline and amorphous materials contained within these disks are variably thermally processed and accreted to make bodies of a wide range of sizes and compositions,…

Earth and Planetary Astrophysics · Physics 2019-02-04 Josep M. Trigo-Rodríguez , Albert Rimola , Safoura Tanbakouei , Victoria Cabedo , Martin Lee

Eccentric mergers are a signature of the dynamical formation channel of binary black holes (BBHs) in dense stellar environments and hierarchical triple systems. Here, we investigate the formation of eccentric mergers via binary-single…

High Energy Astrophysical Phenomena · Physics 2024-03-20 Marco Dall'Amico , Michela Mapelli , Stefano Torniamenti , Manuel Arca Sedda

We show that if comets (or any small icy planetesimals such as Kuiper belt objects) are composed of pebble piles, their internal radiogenic as well as geochemical heating results in considerably different evolutionary outcomes compared to…

Earth and Planetary Astrophysics · Physics 2022-06-03 Uri Malamud , Wolf A. Landeck , Dorothea Bischoff , Christopher Kreuzig , Hagai B. Perets , Bastian Gundlach , Jurgen Blum

A circumsolar dust ring has been recently discovered close to the orbit of Mercury. There are currently no hypotheses for the origin of this ring in the literature, so we explore four different origin scenarios here: the dust originated…

Earth and Planetary Astrophysics · Physics 2023-01-25 Petr Pokorny , Ariel N. Deutsch , Marc J. Kuchner

There is a group of newly recognized asteroids in the main belt that are exhibiting cometary characteristics. We will call them Asteroidal Belt Comets or ABCs. An analysis of their orbital and physical properties has resulted in the…

Earth and Planetary Astrophysics · Physics 2015-06-15 Ignacio Ferrin , Jorge Zuluaga , Pablo Cuartas

Observations in the past decade have revealed extrasolar planets with a wide range of orbital semimajor axes and eccentricities. Based on the present understanding of planet formation via core accretion and oligarchic growth, we expect that…

Astrophysics · Physics 2008-12-18 Sourav Chatterjee , Eric B. Ford , Soko Matsumura , Frederic A. Rasio

Centaurs are objects whose orbits are found between those of the giant planets. They are supposed to originate mainly from the TransNeptunian objects, and they are among the sources of NearEarth Objects.TransNeptunian Objects (TNOs) cross…

Earth and Planetary Astrophysics · Physics 2016-11-18 Mattia Alvise Galiazzo , Paul Wiegert , Safwan Aljbaae

Asteroids and meteorites provide key evidence on the formation of planetesimals in the Solar System. Asteroids are traditionally thought to form in a bottom-up process by coagulation within a population of initially km-scale planetesimals.…

Earth and Planetary Astrophysics · Physics 2016-08-31 Anders Johansen , Emmanuel Jacquet , Jeffrey N. Cuzzi , Alessandro Morbidelli , Matthieu Gounelle
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