Two-component interpretation of solar & stellar coronal plasma differential emission measure (DEM) distributions by Tetsuya Watanabe (NAOJ) １２-JUL-2002.

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Presentation transcript:

Two-component interpretation of solar & stellar coronal plasma differential emission measure (DEM) distributions by Tetsuya Watanabe (NAOJ) １２-JUL-2002

Differential Emission Measure (DEM) １２-JUL-2002

Kano (1996) Scaling Law T5 ∝ pL← RTV; T3 ∝ pL + (D)EM ∝ ne2V ∝ T-4 Shimojo (2001) １２-JUL-2002

High- & Low-Temperature Components Yoshida & Tsuneta (1996) １２-JUL-2002

Solar Active Region vs. Active Corona Active M-dwarf AU Mic: Landini & Monsignori-Fossi (1993) Thomas & Neupert (1994) １２-JUL-2002

Activity-Cycle & Regional Variations Brosius et al. (1995) １２-JUL-2002

Stars with Active Chromospheres: ε Eri & ξ Boo A (SXT) Stars with Active Chromospheres: ε Eri & ξ Boo A Drake et al. (2000) １２-JUL-2002

G/K Giants: 31 Com & β Cet Ayres et al. (1998) RS CVn Star: II Peg Huemoerder et al. (2001 ) １２-JUL-2002

Discussions “Two-component” scenario “Low”-temperature component 106 K < TL(DEM hump) < 4 × 106 K Quiet-sun originated “High”-temperature component TH (DEM max ) ∝ stellar activity Active region originated １２-JUL-2002

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