scholarly journals Migration and Final Location of Hot Super Earths in the Presence of Gas Giants

2007 ◽  
Vol 3 (S249) ◽  
pp. 285-291
Author(s):  
Ji-Lin Zhou ◽  
Douglas N. C. Lin
Keyword(s):  
Tidal Energy ◽  
Dissipation Factor ◽  
Subsequent Evolution ◽  
Tidal Dissipation ◽  
Mean Motion Resonances ◽  
Hot Gas ◽  
Mean Motion ◽  
Migration History ◽  
History Of ◽  
Tidal Energy Dissipation

AbstractBased on the conventional sequential-accretion paradigm, we have proposed that, during the migration of first-born gas giants outside the orbits of planetary embryos, super Earth planets will form inside the 2:1 resonance location by sweeping of mean motion resonances (Zhou et al. 2005). In this paper, we study the subsequent evolution of a super Earth (m1) under the effects of tidal dissipation and perturbation from a first-born gas giant (m2) in an outside orbit. Secular perturbation and mean motion resonances (especially 2 : 1 and 5 : 2 resonances) between m1 and m2 excite the eccentricity of m1, which causes the migration of m1 and results in a hot super Earth. The calculated final location of the hot super Earth is independent of the tidal energy dissipation factor Q′. The study of migration history of a Hot Super Earth is useful to reveal it's Q′ value and to predict its final location in the presence of one or more hot gas giants. When this investigation is applied to the GJ876 system, it correctly reproduces the observed location of GJ876d around 0.02 AU.

The Enrichment History of Hot Gas in Poor Galaxy Groups

1999 ◽  
Vol 511 (1) ◽  
pp. 34-40 ◽  
Author(s):  
David S. Davis ◽  
John S. Mulchaey ◽  
Richard F. Mushotzky
Keyword(s):  
Galaxy Groups ◽  
Hot Gas ◽  
History Of

scholarly journals Motion of dust in mean motion resonances with planets

2009 ◽  
Vol 103 (4) ◽  
pp. 343-364 ◽  
Author(s):  
Pavol Pástor ◽  
Jozef Klačka ◽  
Ladislav Kómar
Keyword(s):  
Mean Motion Resonances ◽  
Mean Motion

scholarly journals Migration and World History: Reaching a New Frontier

2007 ◽  
Vol 52 (1) ◽  
pp. 89-96 ◽  
Author(s):  
Leo Lucassen
Keyword(s):  
Economic History ◽  
Western Europe ◽  
Human Life ◽  
Human Mobility ◽  
Structural Aspect ◽  
Labour Relations ◽  
Migration History ◽  
Significant Phenomenon ◽  
History Of ◽  
And Gender

Migration history has made some major leaps forward in the last fifteen years or so. An important contribution was Leslie Page Moch's Moving Europeans, published in 1992, in which she weaves the latest insights in migration history into the general social and economic history of western Europe. Using Charles Tilly's typology of migration patterns and his ideas on the process of proletarianization since the sixteenth century, Moch skilfully integrates the experience of human mobility in the history of urbanization, labour relations, (proto)industrialization, demography, family history, and gender relations. Her state-of-the-art overview has been very influential, not least because it fundamentally criticizes the modernization paradigm of Wilbur Zelinsky and others, who assumed that only in the nineteenth century, as a result of industrialization and urbanization, migration became a significant phenomenon. Instead, she convincingly argues that migration was a structural aspect of human life. Since then many new studies have proved her point and refined her model.

On the Trails of Free-Roaming Elephants

Transfers ◽  
2020 ◽  
pp. 1-21
Author(s):  
Paul G. Keil
Keyword(s):  
British Empire ◽  
Political History ◽  
Human Mobility ◽  
Human Agency ◽  
Northeast India ◽  
Mountain Ranges ◽  
Migration History ◽  
The Social ◽  
Elephant Population ◽  
History Of

Humans and elephants have historically shared the forested mountain ranges of Zomia, a geography defined by the regular movement of people and an ecology shaped by the movement of its elephant population. This article will examine how free-roaming elephant pathways facilitated human mobility in the highlands defining the Indo-Myanmar border. It will analyze the more-than-human agency that emerges when following elephant trails and the varying role this forest infrastructure might have played in the social and political history of the region. The article will explore two historical examples. First, the migration of a Lisu community in Upper Myanmar who utilized elephant paths to navigate their passage. Second, how the British Empire exploited a network of elephant-human tracks to subjugate the peoples living in Mizoram, northeast India. In these regions the patterns of migration, history of colonization, and identities and practices of communities must be understood in relation to wild elephants.

scholarly journals Planets in Mean-Motion Resonances and the System Around HD45364

2018 ◽  
pp. 2693-2711
Author(s):  
Alexandre C. M. Correia ◽  
Jean-Baptiste Delisle ◽  
Jacques Laskar
Keyword(s):  
Mean Motion Resonances ◽  
Mean Motion

scholarly journals Dynamics of Comets

1992 ◽  
Vol 152 ◽  
pp. 255-268 ◽  
Author(s):  
A. Carusi ◽  
G.B. Valsecchi
Keyword(s):  
Molecular Clouds ◽  
Vertical Component ◽  
The Sun ◽  
Giant Molecular Clouds ◽  
Mean Motion Resonances ◽  
Galactic Field ◽  
Mean Motion ◽  
Short Period ◽  
Gravitational Processes

The gravitational processes affecting the dynamics of comets are reviewed. At great distances from the Sun the motion of comets is primarily affected by the vertical component of the galactic field, as well as by encounters with stars and giant molecular clouds. When comets move in the region of the planets, encounters with these can strongly affect their motion. A good fraction of all periodic comets spend some time in temporary libration about mean motion resonances with Jupiter; some comets can be captured by this planet as temporary satellites. Finally, there is a small number of objects with orbital characteristics quite different from those of all other short-period comets.

Mean Motion Resonances in the Trans-neptunian Region

Icarus ◽  
2000 ◽  
Vol 148 (1) ◽  
pp. 282-300 ◽  
Author(s):  
D. Nesvorný ◽  
F. Roig
Keyword(s):  
Mean Motion Resonances ◽  
Mean Motion
Sign in / Sign up

Export Citation Format

Share Document