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Characteristics of chromospheric Ca II jets guessed from line-profiles

Characteristics of chromospheric Ca II jets guessed from line-profiles. Purpose: Relation among chromospheric jet-like phenomena, magnetic reconnection and coronal heating. Jet-like phenomena. 1) Small cusp-shaped jets in active regions

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Characteristics of chromospheric Ca II jets guessed from line-profiles

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  1. Characteristics of chromospheric Ca II jets guessed from line-profiles Purpose: Relation among chromospheric jet-like phenomena, magnetic reconnection and coronal heating Jet-like phenomena 1) Small cusp-shaped jets in active regions 2) High-speed jet-like phenomena in the upper chromosphere at quiet region 3) Jets on the limb (macro-spicules, surges)

  2. HINODE/SOT Ca II H 2007-06-03 01:15:57 UT 41 km/s 30 km/s (1) Small cusp-shaped jets in active regions Spatial position (19.4” =14.1Mm) Time (467 s)01:13:27 - 01:20:74

  3. Spectrum line-profile at the brightest point in the jet −: Fitted profile calculated with MULTI-code * : Observed profiles 01:15:29 UT 2007-06-03 01:15:57 UT Jet Quiet region Hida/DST (VS) Ca II HSpectroheliogramCa II h3 − 0.5 Å HINODE/SOT Ca II H

  4. Guessed atmospheric structure of fitted line-profile(bold curves: jet, thin curves: quiet region) Doppler Velocity upward ReconnectionPoint ? downward

  5. Ca II H / h1 spectroheliogram (2) High-speed jet-like phenomena in theupper chromosphere at quiet region SOT Hida/DST Ca II H / h2 spectroheliogram Ca II H / h3 spectroheliogram Hida/DST Hida/DST 2007. 08. 1502:38:27 UT (X,Y)=(523,-31) Yellow square: FOV of SOT/Ca H Filtergram • - High frequency in the quiet region • High transversal velocity (~ 100 km/s) • Short lifetime (0.5 - 2 min) • At the higher layer, the contrast is also higher.

  6. Spectrum line-profile at the brightest point in the jet(bold curve: jet, thin curve: quiet region) Jet (?) のプロファイルに対するMULTI コード* フィッティング結果 −: Fitted profile calculated with MULTI-code * : Observed profiles - The profile of this phenomenon mostly has the similar shape to this. - At the photosphere (at the wing), the profile is almost the same as the quiet-region profile.

  7. Guessed atmospheric structure of fitted line-profile (thin curves: jet, bold curves: quiet region) upward Doppler Velocity ReconnectionPoint ? downward • Downflow is shown in entire chromosphere (max ~ 25 km/s). • Physical values except for the velocity are not greatly different from quiet region. • Magnetic reconnection occurs at further higher atmosphere? • => More analyses of EIS, XRT etc. are needed.

  8. (3) Jets on the limb (macro-spicules, surges) 8.4 km/s 55 km/s 48 km/s 2007-08-06 00:37:10 UT HINODE/SOT Ca II H Spatial position (24.2” =17.5Mm) Time (903 s)00:28:40 - 00:43:43

  9. HINODESOT Hida/DST Ca II H Spectroheliogram (line center) 2007.08.06 00:37:15 - 00:39:53 UT 00:39:53 00:39:42 00:39:18 00:37:15 00:37:39

  10. [km/s] 0 +20 -20 Total speed: 50 - 60 km/s Vdop〜−17 km/s 00:37:15 00:37:39 00:39:18 00:39:42 00:39:53 [Å] 0.25 0.5 0 00:37:15 00:37:39 00:39:18 00:39:42 00:39:53 Time variation of Doppler velocity map(from Ca II H spectroheliograms) Time variation of Doppler width map(from Ca II H spectroheliograms)

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