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Preliminary Eclipse Images

Two images of the solar corona in polarized light on August 21, 2017. At left is an image taken during eclipse totality using a PolarCam camera (4D Technology). At right is an image in the same type of polarized light from the Mauna Loa Solar Observatory (MLSO) K-Cor coronagraph camera. Polarized light provides information on the density and magnetic field of the Sun's corona. The K-Cor instrument creates artificial eclipse images of the corona for daily observations of the corona.

PolarCam eclipse image
K-Cor coronagraph image

Images courtesy HAO/NCAR eclipse team and Mauna Loa Solar Observatory.

Recent News

Joan Burkepile leading STEM hands-on workshop
August 31, 2017

For over a decade, Joan Burkepile has participated in the STEM conference for middle school girls called “Expanding Your Horizons,” at CU Boulder. These one-day hands-on workshops are led by women professionals and are designed to be fun and exploratory.

Publication Highlights

Carrington rotation stack plots
September 7, 2017

The Sun’s outer atmosphere is heated to temperatures of millions of degrees, and solar plasma flows out into interplanetary space at supersonic speeds. This paper reviews our current understanding of these interrelated problems: coronal heating and the acceleration of the ambient solar wind.

Identified Grand Minima and Maxima
September 7, 2017

We aim to investigate the nature and occurrence characteristics of grand solar minimum and maximum periods, which are observed in the solar proxy records such as 10Be and 14C, using a fully non-linear Babcock-Leighton type flux transport dynamo including momentum and entropy equations.

Evolution of the vertical component of the magnetic field
August 25, 2017

Formation of Sunspots and Active regions, and Origin of Their Asymmetries—We present a realistic numerical model of sunspot and active region formation based on the emergence of flux bundles generated in a solar convective dynamo.

MLSO Latest Images

CoMP Coronal Intensity

The COronal Multi-channel Polarimeter (CoMP) observes the Fe-XIII emission line at 1074.7 nm to measure the coronal magnetic field and obtain plasma density and motion in the low corona from ~1.03 to 1.5 solar radii.


K-Cor White Light Corona

Designed to study the formation and dynamics of coronal mass ejections and the evolution of the density structure of the low corona, K-Cor records the polarization brightness (pB).


K-Cor (radially graded filter)

K-Cor image with a normalized radially graded filter (nrgf) to maximize image contrast, especially in the outer field.

These data are ideal for measuring positions of coronal structures such as CMEs and helmet streamers.

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