K. Wilhelm

Publications
Influence

The SUMER spectral atlas of solar-disk features

W. Curdt, P. Brekke, +4 authors P. Lemaire
Physics
1 August 2001

A far-ultraviolet and extreme-ultraviolet (FUV, EUV) spectral atlas of the Sun between 670 Aa nd 1609 A in the rst order of diraction has been derived from observations obtained with the SUMER (Solar… Expand

SUMER — Solar Ultraviolet Measurements of Emitted Radiation

K. Wilhelm, W. Curdt, +13 authors O. Siegmund
Physics
1 November 1988

The instrument SUMER — Solar Ultraviolet Measurements of Emitted Radiation is designed to investigate structures and associated dynamical processes occurring in the solar atmosphere, from the… Expand

Bi-directional plasma jets produced by magnetic reconnection on the Sun

D. Innes, B. Inhester, W. Axford, K. Wilhelm
Physics
Nature
1 April 1997

Magnetic reconnection, the process by which magnetic lines of force break and rejoin into a lower-energy configuration, is considered to be the fundamental process by which magnetic energy is… Expand

Solar Wind Origin in Coronal Funnels

C. Tu, C. Zhou, +4 authors K. Wilhelm
Physics, Medicine
Science
22 April 2005

The origin of the solar wind in solar coronal holes has long been unclear. We establish that the solar wind starts flowing out of the corona at heights above the photosphere between 5 megameters and… Expand

The corona above polar coronal holes as seen by SUMER on SOHO

K. Wilhelm, E. Marsch, +4 authors M. Huber
Physics
20 June 1998

In order to address two of the principal scientific objectives of the Solar and Heliospheric Observatory (SOHO), studies of the heating mechanisms of the solar corona and the acceleration processes… Expand

FIRST RESULTS OF THE SUMER TELESCOPE AND SPECTROMETER ON SOHO – II. Imagery and Data Management

P. Lemaire, K. Wilhelm, +13 authors M. Grewing
Physics
1997

SUMER – Solar Ultraviolet Measurements of Emitted Radiation – is not only an extreme ultraviolet (EUV) spectrometer capable of obtaining detailed spectra in the range from 500 to 1610 Å, but, using… Expand

ION TEMPERATURES IN A SOLAR POLAR CORONAL HOLE OBSERVED BY SUMER ON SOHO

C. Tu, E. Marsch, K. Wilhelm, W. Curdt
Physics
10 August 1998

The temperatures of some highly charged ions in the southern solar polar coronal hole are determined from the widths of the extreme ultraviolet (EUV) lines measured by the SUMER (Solar Ultraviolet… Expand

Properties of quiet-sun coronal plasmas at distances of 1.03 lt;= RS lt;= 1.50 along the solar equatorial plane

U. Feldman, G. Doschek, U. Schühle, K. Wilhelm
Physics
10 June 1999

We determine the physical properties, i.e., electron temperature, density, line-of-sight emission measure, and element-abundance variation with height, in the Sun's equatorial west limb streamer… Expand

Broadening of Si VIII lines observed in the solar polar coronal holes

D. Banerjee, L. Teriaca, J. Doyle, K. Wilhelm
Physics
1 November 1998

We study the variation of the line width and electron density as a function of height above two coronal holes from forbidden spectral lines of Si viii. The spectra were obtained with the Solar… Expand

First Halley Multicolour Camera imaging results from Giotto

H. Keller, C. Arpigny, +15 authors K. Wilhelm
Physics
15 May 1986

The first imaging results from the Halley Multicolour Camera (HMC) during the Giotto fly-by of comet Halley provide images centred on the brightest part of the inner coma which show the silhouette of… Expand

Recommended Authors