Results 121 to 130 of about 1,639,294 (145)

Migration and development. A theoretical perspective [PDF]

open access: yes, 2007
de Haas H. Migration and development. A theoretical perspective. COMCAD Arbeitspapiere - working papers, 29.
de Haas, Hein
core  

Migration aspirations and immobility in a Malian Soninke village [PDF]

open access: yes, 2008
This paper explores the local meaning of migration and the experience of immobility among young men of Soninke ethnicity in a village in the Kayes region of Mali.
Jónsson, Gunvor
core  

The Occurrence Rate of Nearby Planetary Companions to Hot Jupiters

open access: yesThe Astronomical Journal
Of the >500 confirmed transiting hot Jupiters and ≈2000 additional candidates today, only 10 are known to have nearby companion planets. The survival of nearby companions means that these hot Jupiters cannot have migrated to their present location via ...
Lizhou Sha   +35 more
doaj   +1 more source

Social Mechanisms Underlying Network Effects in Mexico-U.S. Migration

open access: yes, 2017
Scholars have long noted how migration streams, once initiated, obtain a self-feeding character. Studies have attributed this phenomenon, called the cumulative causation of migration, to expanding social networks that connect migrants in destination to ...
Filiz Garip, Asad, Asad Lugman
core   +1 more source

Close-Orbiting Exoplanets: Formation, Migration Mechanisms and Properties

2008
The discovery of a signal from a putative extra-solar planet around the nearby Sun-like star 51 Peg by Mayor & Queloz and the rapid confirmation by Marcy & Butler was the main starting point for the field of extrasolar planets. More than a decade later, ‘51 Peg - type planets’ or ‘hot Jupiters’ are frequently discovered and characterised by a variety ...
Hugh R. A. Jones   +2 more
openaire   +1 more source

Formation and Migration Histories of Giant Exoplanets in Multi-stellar Systems

2017
The first planets discovered outside of our solar system were very different from the solar system planets. These discoveries raised new challenges to planet formation models, which were designed to explain the origin of the solar system planets. One particularly intriguing population, the "hot Jupiters" were some of the first planets discovered. These
openaire   +1 more source

Exoplanets in Open Clusters and Binaries: New Constraints on Planetary Migration

2016
In this dissertation, we present three complementary studies of the processes that drive planetary migration. The first is a radial-velocity survey in search of giant planets in adolescent (Gyr) open clusters. While several different mechanisms may act to drive giant planets inward, only some mechanisms will excite high eccentricities while doing so ...
openaire   +1 more source

Exploring Exoplanets' Spectroscopic Secrets: Clues on the Migration and Formation of Hot Jupiters

2018
Before the mid-90's, scientists' theories for planet formation were finely-tuned to explain the existence of our own Solar System. These theories were thrown into disarray when astronomers began to discover exoplanets, or planets in other solar systems.
openaire   +1 more source

Experimental Determination of Mantle Solidi and Melt Compositions for Two Likely Rocky Exoplanet Compositions

Journal of Geophysical Research E: Planets, 2021
Christy Till, Kara Brugman
exaly  

Home - About - Disclaimer - Privacy