Tracing the origin of solar macrospicules

Photo voltaic spicules are small-scale, beam-like, cold-plasma-ejected phenomena that represent an vital element of the chromosphere. Macrospicules are chromospheric spicules at a bigger spatial scale.

The examine of macrospicules will assist us perceive the driving mechanism of the spicules as a result of the triggering means of macrospicules in remark is definitely resolved by fashionable high-resolution solar remark tools.

Lately, researchers from the Yunnan Observatories of the Chinese language Academy of Sciences and their collaborators from Yunnan College used the chromosphere high-resolution telescope from the New Vacuum Photo voltaic Telescope to check the detailed evolution means of the bottom of the macrospicules.

The examine was printed in The Astrophysical Journal Letters on Jan. 6.

The researchers discovered that earlier than the launch of every macrospicule, a compact brilliant patch (BP) was detected at its base the place a newly rising dipole contacts and cancel with the preexisting ambient discipline.

The spectral prognosis from the Interface Area Imaging Spectrograph at certainly one of BPs revealed signatures of reconnection on the decrease ambiance. They recommended that the macrospicules and associated BPs shaped in a standard reconnection course of, wherein the growing reconnection peak between the rising dipole and the ambient discipline resulted within the noticed variations from BPs to macrospicules.

The researchers concluded that the formation mechanism of macrospicules needs to be the identical as spicules and coronal jets, i.e., solar jetting phenomena at totally different scales share the identical bodily mechanism in affiliation with magnetic reconnection.

This work supplied clear observational proof that the macrospicules originated from magnetic reconnection within the decrease solar ambiance, and supplied new clues for understanding the driving mechanism of spicules.