Recent observations have revealed that magnetohydrodynamic (MHD) waves and
oscillations are ubiquitous in the solar atmosphere, with a wide range of periods. We give a …

The corona is a layer of hot plasma that surrounds the Sun, traces out its complex magnetic
field, and ultimately expands into interplanetary space as the supersonic solar wind …

Aims. Solar Orbiter, the first mission of ESA's Cosmic Vision 2015–2025 programme and a
mission of international collaboration between ESA and NASA, will explore the Sun and …

Coronal holes are areas on the Sun with open magnetic field lines. They are a source region
of the solar wind, but how the wind emerges from coronal holes is not known. We observed …

Switchbacks are sudden, large radial deflections of the solar wind magnetic field, widely
revealed in interplanetary space by the Parker Solar Probe. The switchbacks' formation …

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 …

X-ray and ultraviolet (UV) observations of the outer solar atmosphere have been used for
many decades to measure the fundamental parameters of the solar plasma. This review …

One of the most important early results from the Parker Solar Probe (PSP) is the ubiquitous
presence of magnetic switchbacks, whose origin is under debate. Using a three-dimensional …

While it is certain that the fast solar wind originates from coronal holes, where and how the
slow solar wind (SSW) is formed remains an outstanding question in solar physics even in …

Using data obtained by the EUV Imaging Spectrometer on board Hinode, we have
performed a survey of obvious and persistent (without significant damping) Doppler shift …