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LEMUR: Large European Module for solar Ultraviolet Research. European contribution to JAXA's Solar-C mission | | Luca Teriaca
; Vincenzo Andretta
; Frédéric Auchère
; Charles M. Brown
; Eric Buchlin
; Gianna Cauzzi
; J. Len Culhane
; Werner Curdt
; Joseph M. Davila
; Giulio Del Zanna
; George A. Doschek
; Silvano Fineschi
; Andrzej Fludra
; Peter T. Gallagher
; Lucie Green
; Louise K. Harra
; Shinsuke Imada
; Davina Innes
; Bernhard Kliem
; Clarence Korendyke
; John T. Mariska
; Valentin Martínez-Pillet
; Susanna Parenti
; Spiros Patsourakos
; Hardi Peter
; Luca Poletto
; Rob Rutten
; Udo Schühle
; Martin Siemer
; Toshifumi Shimizu
; Hector Socas-Navarro
; Sami K. Solanki
; Daniele Spadaro
; Javier Trujillo-Bueno
; Saku Tsuneta
; Santiago Vargas Dominguez
; Jean-Claude Vial
; Robert Walsh
; Harry P. Warren
; Thomas Wiegelmann
; Berend Winter
; Peter Young
; | | Date: |
20 Sep 2011 | | Abstract: | Understanding the solar outer atmosphere requires concerted, simultaneous
solar observations from the visible to the vacuum ultraviolet (VUV) and soft
X-rays, at high spatial resolution (between 0.1" and 0.3"), at high temporal
resolution (on the order of 10 s, i.e., the time scale of chromospheric
dynamics), with a wide temperature coverage (0.01 MK to 20 MK, from the
chromosphere to the flaring corona), and the capability of measuring magnetic
fields through spectropolarimetry at visible and near-infrared wavelengths.
Simultaneous spectroscopic measurements sampling the entire temperature range
are particularly important.
These requirements are fulfilled by the Japanese Solar-C mission (Plan B),
composed of a spacecraft in a geosynchronous orbit with a payload providing a
significant improvement of imaging and spectropolarimetric capabilities in the
UV, visible, and near-infrared with respect to what is available today and
foreseen in the near future.
The Large European Module for solar Ultraviolet Research (LEMUR), described
in this paper, is a large VUV telescope feeding a scientific payload of
high-resolution imaging spectrographs and cameras. LEMUR consists of two major
components: a VUV solar telescope with a 30 cm diameter mirror and a focal
length of 3.6 m, and a focal-plane package composed of VUV spectrometers
covering six carefully chosen wavelength ranges between 17 and 127 nm. The
LEMUR slit covers 280" on the Sun with 0.14" per pixel sampling. In addition,
LEMUR is capable of measuring mass flows velocities (line shifts) down to 2
km/s or better.
LEMUR has been proposed to ESA as the European contribution to the Solar C
mission. | | Source: | arXiv, 1109.4301 | | Services: | Forum | Review | PDF | Favorites | |
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