Department of Astronomy, Nanjing University, Nanjing 210093, China C. Fang, M. D. Ding, P. F. Chen Possible collaboration between Solar-B and the facilities of Nanjing University
Jan 20, 2016
Department of Astronomy,
Nanjing University,
Nanjing 210093, China
C. Fang, M. D. Ding, P. F. Chen
Possible collaboration between Solar-B and the facilities of Nanjing University
Outline
1. Observation History in Nanjing University
2. Introduction to the New Telescope
3. Scientific Objectives and Possible Collaborations
4. SMESE- a Franco-Chinese Small Satellite
5. Summary
Solar Tower (since 1980)
Multi-wavelength
2-Dimensional
Spectrograph
H
Ca II (K, 8642)
He I 10830
Highlights of the Achievements
1. More accurate atmospheric models for solar flares
Liu, Ding, Fang, : 2001, ApJ, 563, L169
Li & Ding, 2004, ApJ, 606, 583
2. A near infrared WLF
3. Nonthermal signatures
Ding & Fang: 1995, A&AS, 563, L169
From Nanjing to Kunming
Fuxian Lake
撫仙湖
31.8 km
New Site: Fuxian LakeLocation: E102º57´, N24º38´ (60 km from Kunming)Altitude: 1722 m Total area: 212 km2
Second deepest lake in China, mean depth is 87m.
Main Components
Three Tubes
H 6563
He I 10830
White light
Designed by NIAOT
Name of the Telescope
ONSET:
Optical and NIR Solar Eruption Tracer
H Filtergraph
H center, ±0.5 Å
275mm
1-120 frames per minute
Credit: BBSO
He I 10830 Filtergraph
He I 1083.0nm center
275mm
1 frame per minute
Credit: MLO
White Light Filtergraph
200mm
1-4 frames per minute
Credit: BBSO
Λ360.0 nm and
425.0 nm
Scientific Objectives and Possible Collaborations
Flare dynamics
H and high-T flares, WLF patrol, …
CME onset and wave survey
He wave/brightening, Moreton waves, EIT wave, filament eruptions, …
Structures and evolution of various activities
Coronal holes, small activities, microflares, filament oscillation, …
Flare Ribbons and Dynamics
Ribbon motion recon. rate Fast fluctuations: elementary burstsWang, H. et al. (2000)
H-1.3 Å
Qiu et al. (2004)
To derive non-thermal parameters and dynamical processes of flares
through ground-based and space observations!
White Light Flare Patrol
Since 1859, only ~110
WLFs have been observed.There should be more!
1. They are short-lived;
2. Few telescopes tailored for that purpose.
Hudson (2005): All flares are WLFs. (Trace …) Need be checked
carefully!A catalog including types I & II WLFs
(Fang & Ding 1995) will be provided.
Flare-associated Sprays, Surges, …
Kurokawa et al. (1987)
Jibben & C. Canfield (2004)
Handedness distribution,Helicity transport,
…
right-handedleft-handed
H center, ±0.5 Å
Filament Eruptions near CME Onset
H center, ±0.5 Å
LOS velocityMorimoto & Kurokawa (2003)
Chen & Shibata (2000)
Zhang et al. (2001)
1. To monitor the onset of filament eruptions;
2. To clarify the relationship btw CMEs and flares.
CME-associated Waves/Brightenings
He wavesGilbert et al. (2004)
EIT wavesThompson et al. (1998)
Coronal wavesHarra & Sterling (2003)
Moreton Waves
H+0.8ÅCredit: Kyoto University colleagues Ha+0.4 Å
Ha-0.4 ÅH ± 0.4 Å may be the best
Chen, Fang, Ding (2005, Space Sci. Rev.)
Chen et al. (2002, ApJ, 572, L99)
Moreton, EIT, X-ray and He Waves will be recorded,which is crucial for understanding CMEs
Dispute on EIT wave mechanism
Fast-mode wave model
Non-wave model
Thompson et al. (1998)Wang, Y. -M. (2000)Wu et al. (2001)……
Delannee & Aulannier (2000)Chen et al. (2002, ApJ, 572, L99)
775 km/s
250 km/s
Coordinated observations will finally resolve the dispute
Ellerman Bombs, Microflares, Dark points, Coronal Holes, …
EBs,MF
CHs
DPs Harvey (1984)
Chen et al. (2001, ChJAA, 1, 177)
Coordinated observations with SOT, XRT and EIS will be very useful to understand the mechanism for small scale activities and magnetic reconnection in the solar atmosphere and the source of the fast solar wind
He 10830 SXR
Fang et al. (2006, ApJ, in press)
Filament Oscillations
Eto et al. (2002)
-0.8 Å H core +0.8 Å
Prominence seismology will be enhanced!
Operations
Partner in construction and operations:
YNO: NAOC/Yunnan Observatory
Commencement: 2008
Data Policy: open
Observation Modes
Partial Disk Mode (PDM, better
than 1“, FOV:10’)
Full Disk Mode (FDM)
Introduction of SMESE (SMall Explorer for Solar Eruptions)
Institut d’Astrophysique Spatiale, CNRS, France Observatoire de Paris, LESIA, France Purple Mountain Observatory, CAS, China Nanjing University, China Center for Space Research and applied Research, CAS,
China National Astronomical Observatory, CAS, China
A Franco-Chinese small satellite
To observe the solar flares and CMEs
for the next solar maximum
Main Scientific Objectives
Lyman-alpha disc imager (up to 1.15R¤)
Lyman-alpha coronograph (1.1-2.5R¤)
EUV (FeXII 19.5 nm) disc imager Far Infrared telescope (35 & 150 m) X-ray spectrometer (10-300 keV) Gamma-ray spectrometer (0.2-600 MeV)
Instruments
MYRIAD
DESIR
LYOT
HEBS
Guide Telescope
SMESE Payload
Main parameters
Total weight of payloads: 56 kg Total power consumption: 90 watt Data rate: 31Gb per day Dawn-dusk sun-synchronous orbit Altidute: 700 Km Launch time: 2010 - 2011
Prospects
Coordinated observations with solar-B
will greatly contribute to the study of
solar flares and CMEs
Summary
1. ONSET can monitor the onset of CMEs, detect various activities with different scales, conduct the H, He and Wight light patrol, ……
3. Coordinated observations with SOT, XRT and EIS will be greatly desirable!
4. Data center will be installed in Nanjing University and IAS in France. You are encouraged to use the data!
2. SMESE can provide Lyαimages, Lyαcoronagraphs,
EUV images, HXR and γ-ray flux with high temporal
resolution.
谢 谢!谢 谢!ThankThankss !!