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HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0094

Driving mechanism(s) of  small scale transient brightenings  in the solar atmosphere

plan term


@ @


 name : Subramanian, Madjarska, Del Zanna, Doyle @  e-mail : sri[at]arm.ac.uk

contact person in HINODE team

 name : Culhane @  e-mail : jlc[at]mssl.ucl.ac.uk

 abstract of observational proposal
Small scale transient brightenings such as blinkers, jets, explosive events etc occur continuously in the solar atmosphere both in the transition region and the corona. As the identification and classification of these brightenings depends entirely on the instrumental limitations and observing techniques, these events could share similar driving mechanisms. The understanding of such transients and their unification are crucial in understanding the fundamentals of the solar atmosphere also their contribution to the coronal heating and solar wind issues.

Marik and Erdlyi (2002) suggested that CDS/SoHO might actually observe reconnection driven explosive events as blinkers. Madjarska and Doyle (2003) suggested that blinkers could be the on-disk counter part of spicules. O'Shea et al. (2005) reported blinkers in the off-limb region and suggested that blinkers are the signatures of macro-spicules.

Subramanian et al. (2008) reported that the flux emergence, which gave rise to loop formations as seen with TRACE and/or with the release of magnetic energy across the coronal null derived from a 3D magnetic topology analysis, could be the cause of blinkers.

The aim of this study is to determine the driving mechanism(s) behind these events as well as to study their coronal responses. For this, it is crucial to obtain the plasma parameters of these events and their magnetic topology. From EIS data, we can derive the densities, temperatures and Doppler shifts of the associated plasma. Highly coordinated observations such as magnetograms and Halpha images from SOT along with XRT will give a clue on the unification of classified transients for instance like blinkers and spicules/macro-spicules/jets along with CDS/SoHO, the later of which is necessary in the identification of the already known blinkers. We will also review the coronal response of the features named blinkers, by using simultaneous CDS and EIS observations.

 request to SOT
NaI 5896 FGIV magnetograms - 1/min
H-alpha 6563/SOT - 1/min

 request to XRT
Al poly/XRT - 1/min

 request to EIS
ID                      -1
ACRONYM                 blinker_cr
TITLE                   coronal responses of QS transient brightenings
TYPE                    0
TARGET                  Quiet Sun
AUTHOR                  Gerry Doyle
DATE                    11-Nov-2008
DURATION                1561273
VOLUME                  17885034
NRASTERS                1
RECURSIVE               0
SLIT_SLOT               0,2,2
XRT_FLARE_RESPONSE      0,0,0,0,0,0,0
EIS_FLARE_RESPONSE      0,0,0,0,0
EIS_EVENT_RESPONSE      0,0,0,0,0
AEC_RESPONSE            0
STUDYRASTERS            1
RA_ID                   -1

 other participating instruments


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