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The standard model for planet formation is a bottom-up process in which the origin of rocky and gaseous planets can be traced back to the collision of micron-sized dust grains within the gas-rich environment of protoplanetary disks. Key…

Earth and Planetary Astrophysics · Physics 2025-04-14 Philip J. Armitage

The mechanism of continuous set of different universes formation is elaborated. It provides tool to solve the problem of observed smallness of physical parameters. Solution of two puzzles - the hierarchy and the cosmological constant…

General Relativity and Quantum Cosmology · Physics 2015-11-13 Sergey G. Rubin

The wealth of experimental data collected at laboratory experiments suggests that there is some scale separation between the Standard Model (SM) and phenomena beyond the SM (BSM). New phenomena can manifest itself as small corrections to SM…

In this chapter, we review the processes involved in the formation of planetesimals and comets. We will start with a description of the physics of dust grain growth and how this is mediated by gas-dust interactions in planet-forming disks.…

Earth and Planetary Astrophysics · Physics 2022-12-12 Jacob B. Simon , Jürgen Blum , Til Birnstiel , David Nesvorný

The dynamics of planetesimals plays an important role in planet formation, because their velocity distribution sets the growth rate to larger bodies. When planetesimals form in protoplanetary discs, their orbits are nearly circular and…

Earth and Planetary Astrophysics · Physics 2020-11-25 Sebastian Lorek , Anders Johansen

As the panel on Planetary Systems and Star Formation (PSF) is fully aware, the next decade will see major advances in our understanding of these areas of research. To quote from their charge, these advances will occur in studies of solar…

Instrumentation and Methods for Astrophysics · Physics 2009-03-02 AAS WGLA , Nancy Brickhouse , John Cowan , Paul Drake , Steven Federman , Gary Ferland , Adam Frank , Eric Herbst , Keith Olive , Farid Salama , Daniel Wolf Savin , Lucy Ziurys

Gravitational scattering of small bodies (planetesimals) by a planet remains a fundamental problem in celestial mechanics. It is traditionally modeled within the circular restricted three-body problem (CR3BP), where individual particle…

Earth and Planetary Astrophysics · Physics 2026-02-11 Yukun Huang , Brett Gladman , Eiichiro Kokubo

Planet formation models have been developed during the last years in order to try to reproduce the observations of both the solar system, and the extrasolar planets. Some of these models have partially succeeded, focussing however on…

Earth and Planetary Astrophysics · Physics 2015-06-16 Y. Alibert , F. Carron , A. Fortier , S. Pfyffer , W. Benz , C. Mordasini , D. Swoboda

Observations of extrasolar planets reveal that planets can be found in close binary systems, where the semi-major axis of the binary orbit is less than 20 AU. The existence of these planets challenges planet formation theory, because the…

Astrophysics · Physics 2009-11-13 S. -J. Paardekooper , P. Thebault , G. Mellema

Newly-formed planetary systems with ages of <10 Myr offer many unique insights into the formation, evolution, and fundamental properties of extrasolar planets. These planets have fallen beyond the limits of past surveys, but as we enter the…

Earth and Planetary Astrophysics · Physics 2009-02-19 Adam L. Kraus , Kevin Covey , Michael Liu , Stanimir Metchev , Russel White , Lisa Prato , Doug Lin , Mark Marley

Formation models in which terrestrial bodies grow via the pairwise accretion of planetesimals have been reasonably successful at reproducing the general properties of the solar system, including small body populations. However, planetesimal…

Earth and Planetary Astrophysics · Physics 2023-07-20 Spencer C. Wallace , Thomas R. Quinn

Numerical simulations have become a major tool for understanding galaxy formation and evolution. Over the decades the field has made significant progress. It is now possible to simulate the formation of individual galaxies and galaxy…

Astrophysics of Galaxies · Physics 2017-08-30 Thorsten Naab , Jeremiah P. Ostriker

(Abridged) The discovery of extrasolar planetary systems revealed an unexpected diversity of planetary systems that has revolutionized planet formation theory. A strong program of theoretical research is essential to maximize both the…

In support of the National Acadamies' Exoplanet Science Strategy, this whitepaper outlines key technology challenges for studying the diversity of worlds in the Galaxy and in searching for habitable planets. Observations of habitable…

Instrumentation and Methods for Astrophysics · Physics 2018-03-14 Brendan Crill , Nick Siegler , Shawn Domagal-Goldman , Eric Mamajek , Karl Stapelfeldt

Over the last decade, researchers and engineers have developed a vast body of methodologies and technologies in requirements engineering for self-adaptive systems. Although existing studies have explored various aspects of this topic, few…

Software Engineering · Computer Science 2021-08-23 Zhuoqun Yang , Zhi Li , Zhi Jin

We present an algebraic map (MAMA) for the dynamical and collisional evolution of a planetesimal swarm orbiting the main star of a tight binary system (TBS). The orbital evolution of each planetesimal is dictated by the secular…

Earth and Planetary Astrophysics · Physics 2015-06-17 A. M. Leiva , J. A. Correa-Otto , C. Beaugé

I review the current status of Big Bang Cosmology, with emphasis on current issues in dark matter, dark energy, and galaxy formation. These topics motivate many of the current goals of experimental cosmology which range from targeting the…

Cosmology and Nongalactic Astrophysics · Physics 2017-03-29 Joseph Silk

Transiting planet discoveries have yielded a plethora of information towards understanding the structure and atmospheres of extra-solar planets. These discoveries have been restricted to the short-period or low-periastron distance regimes…

Earth and Planetary Astrophysics · Physics 2009-12-09 Stephen R. Kane , Suvrath Mahadevan , Kaspar von Braun , Gregory Laughlin , Andrew Howard , David R. Ciardi

We review the state of the art in follow-up photometry for planetary transit searches. Three topics are discussed: (1) Photometric monitoring of planets discovered by radial velocity to detect possible transits (2) Follow-up photometry of…

Astrophysics · Physics 2007-05-23 Frederic Pont , Claire Moutou

The workshop on Small Ionized and Neutral Structures in the Interstellar Medium featured many contributions on the theory of the objects which are responsible for ``Tiny Scale Atomic Structures'' (TSAS) and ``Extreme Scattering Events''…

Astrophysics · Physics 2007-05-23 Steven R. Spangler , Enrique Vazquez-Semadeni