Observable Signals of Coronal Heating Processes
نویسندگان
چکیده
منابع مشابه
Coronal heating: analogous processes in stellar and galactic media
Coronal plasmas of high temperature (106 K and more) have been confirmed now to exist not only around stars like the Sun, but also around the planes of galaxies including our Milky Way and even extragalactic systems. Structural similarities exist between stellar atmospheres comprising coronae and transition zones and the dilute plasma around galaxies. In this paper the heating of these plasmas ...
متن کاملThe Coronal Heating Paradox
The ‘‘coronal heating problem’’ has been with us over 60 years, and hundreds of theoretical models have been proposed without an obvious solution in sight. In this paper we point out that observations show no evidence for local heating in the solar corona, but rather for heating below the corona in the transition region and upper chromosphere, with subsequent chromospheric evaporation as known ...
متن کاملMechanisms of Solar Coronal Heating
A major problem in astrophysical plasma physics is to explain how the outer atmosphere, the corona, ofthe sun is heated to temperatures of millions of degrees Kelvin. It is accepted that the heating mechanism is magnetic, with the energy source being turbulent motions below the solar surface. Two classes of theory are proposed, according to the timescale of the driving motions in relation to th...
متن کاملKey aspects of coronal heating
We highlight 10 key aspects of coronal heating that must be understood before we can consider the problem to be solved. (1) All coronal heating is impulsive. (2) The details of coronal heating matter. (3) The corona is filled with elemental magnetic stands. (4) The corona is densely populated with current sheets. (5) The strands must reconnect to prevent an infinite build-up of stress. (6) Nano...
متن کاملSignatures of Coronal Heating Mechanisms
Alfvén waves created by sub-photospheric motions or by magnetic reconnection in the low solar atmosphere seem good candidates for coronal heating. However, the corona is also likely to be heated more directly by magnetic reconnection, with dissipation taking place in current sheets. Distinguishing observationally between these two heating mechanisms is an extremely difficult task. We perform 1....
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Highlights of Astronomy
سال: 1995
ISSN: 1539-2996
DOI: 10.1017/s1539299600011291