2008/09/02 by Ana I. Gómez de Castro, Ana I. Gomez de Castro · 14 citations
Physics and Astronomy · #Accretion (finance) #Angular momentum #Astro and Planetary Science #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Classical mechanics #Photosphere #Physics #Planet #Planetesimal #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1007/s10509-008-9894-4
published in Astrophysics and Space Science 320(1-3), 97-106 (Springer Science+Business Media) · Accepted for publication in Astrophysics and Space Science 9 figures
arxiv created 2008/09/02 · openalex publication_date 2008/10/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Planetary systems are angular momentum reservoirs generated during star formation. This accretion process produces very powerful engines able to drive the optical jets and the molecular outflows. A fraction of the engine energy is released into heating thus the temperature of the engine ranges from the 3000K of the inner disk material to the 10MK in the areas where magnetic reconnection occurs. There are important unsolved problems concerning the nature of the engine, its evolution and the impact of the engine in the chemical evolution of the inner disk. Of special relevance is the understanding of the shear layer between the stellar photosphere and the disk; this layer controls a significant fraction of the magnetic field building up and the subsequent dissipative processes ougth to be studied in the UV. This contribution focus on describing the connections between 1 Myr old suns and the Sun and the requirements for new UV instrumentation to address their evolution during this period. Two types of observations are shown to be needed: monitoring programmes and high resolution imaging down to, at least, milliarsecond scales.