The formation of planetary disks and winds: an ultraviolet view

Abstract

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.

arXiv commentAccepted for publication in Astrophysics and Space Science 9 figures

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Cited by in corpus (7)

• XMM-Newton monitoring of the close pre-main-sequence binary AK Sco. Evidence of tide driven filling of the inner gap in the circumbinary disk
• Towards a population synthesis of discs and planets. II. Confronting disc models and observations at the population level
• On the source of dense outflows from T Tauri Stars. and III. Winds driven from the star-disc shear layer
• AK Sco, first detection of a highly disturbed atmosphere in a pre-main sequence close binary
• Photoelectric charging of dust grains in the environment of Young Stellar Objects
• Constraints to the magnetospheric properties of T Tauri stars - II. The Mg II ultraviolet feature
• Identifying the population of T-Tauri stars in Taurus: UV-optical synergy