Planet–Planet Secular Migration Predicts a Stellar Obliquity–Period Anticorrelation
The Astrophysical Journal LettersStellar obliquities provide a fossil record of hot-Jupiter (HJ) migration. An emerging observational trend in single-star systems is that strongly misaligned HJs are largely confined to short orbital periods, while longer-period HJs are preferentially ...
Hareesh Gautham Bhaskar +2 more
doaj +1 more source
Study of Exoplanet Migration Mechanisms with the Direct Imaging Method
Study of Exoplanet Migration Mechanisms with the Direct Imaging Method学位の種別:課程博士 審査委員会委員 : （主査）東京大学教授 小久保 英一郎, 東京大学准教授 宮田 隆志, 東京大学准教授 片坐 宏一, 東京大学准教授 生駒 大洋, 大阪大学教授 芝井 ...
openaire +1 more source
North African migration systems: evolution, transformations and development linkages
, 2007 The main aim of this paper is to understand the evolution and transformation of North African migration systems since 1945 within a conceptual framework drawing on migration systems and transitional migration theory.
de Haas, Hein
core
Migration as cause and consequence of aspirations : DEMIG project paper no. 13 [PDF]
, 2012 This paper aims to disentangle the relationship between aspirations and migration by analysing why Indonesian internal migrants generally have higher aspirations when compared with non-migrants.
Czaika, Mathias
core
Contextualizing immigrant interwave dynamics and the consequences for migration processes: Ukranians in the United Kingdom and the Netherlands [PDF]
, 2011 What drives international migration? Theories of migration networks, migration culture, migration systems and cumulative causation suggest that once a critical threshold level of migrants have settled, migration tends to stimulate the creation of social ...
Kubal, Agnieszka
core
Unified Formation Channel of Hot and Warm Jupiters via Planet–Planet Scattering
The Astrophysical Journal LettersRecent observations show distinct orbital architectures for hot and warm Jupiters: hot Jupiters span a wide range of stellar obliquities and tend to host distant companions without close-by companions, whereas warm Jupiters are often aligned and ...
Julia Esposito, Gongjie Li, Songhu Wang
doaj +1 more source
Observing a 542-day transiting giant with large transit-timing variations
Astronomy & AstrophysicsIt is inherently challenging to characterize long-period transiting exoplanets because the transit events are rare and last long. These systems provide unique insights into planetary formation, migration, the detection of exomoons, and primordial ...
Leonardi P. +29 more
doaj +1 more source
Case Study of a Super-eccentric Warm Jupiter Migrating via Equilibrium and Dynamical Tides
The Astrophysical JournalA leading theory for hot Jupiter formation is high-eccentricity migration, in which planets are born at large separations and excited to near-unity eccentricities, creating extreme tidal dissipation that shrinks and circularizes their orbits.
Donald Liveoak +2 more
doaj +1 more source
Summary report on the MIPEX health strand and country reports [PDF]
, 2016 The Migrant Integration Policy Index (MIPEX) Health strand is a questionnaire designed to supplement the existing seven strands of the MIPEX, which in its latest edition (2015) monitors policies affecting migrant integration in 38 different countries ...
International Organization for Migration +1 more
core
TOI-2494 c and TOI-5143 c: A Hot Saturn and a Hot Jupiter with Interior Planetary Companions
The Astronomical JournalWe present the TESS-based discoveries of planetary systems orbiting the late G dwarfs TOI-2494 and TOI-5143, each of which harbors a hot giant planet and a smaller interior planet. TOI-2494 hosts a transiting mini-Neptune ( P = 2.41 days, $\,{R}_{{\rm{P}}
Samuel N. Quinn +71 more
doaj +1 more source