Detail publikace
Structure and Dynamics of the 2009 July 22 Eclipse White-light Corona
PASACHOFF, J. RUŠIN, V. SANIGA, M. DRUCKMÜLLEROVÁ, H. BABCOCK, B.
Český název
Structure and Dynamics of the 2009 July 22 Eclipse White-light Corona
Anglický název
Structure and Dynamics of the 2009 July 22 Eclipse White-light Corona
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
The white-light corona (WLC) during the total solar eclipse of 2009 July 22 was observed by several teams in the Moon's shadow stretching from India and China across the Pacific Ocean with its many isolated islands. We present a comparison of the WLC as observed by eclipse teams located in China (Shanghai region) and on the Enewetak Atoll in the Marshall Islands, with observations taken 112 minutes apart, combined with near-simultaneous space observations. The eclipse was observed at the beginning of solar cycle 24, during a deep solar minimum (officially estimated as 2008 December according to the smoothed sunspot number, but very extended). The solar corona shows several different types of features (coronal holes, polar rays, helmet streamers, faint loops, voids, etc.), though it was extremely sparse in streamers as shown from Large-Angle Spectroscopic Coronagraph data. No large-scale dynamical phenomena were seen when comparing the observations from the two sites, confirming that the corona was quiescent. We measure a Ludendorff flattening coefficient of 0.238, typical of solar minimum.
Český abstrakt
The white-light corona (WLC) during the total solar eclipse of 2009 July 22 was observed by several teams in the Moon's shadow stretching from India and China across the Pacific Ocean with its many isolated islands. We present a comparison of the WLC as observed by eclipse teams located in China (Shanghai region) and on the Enewetak Atoll in the Marshall Islands, with observations taken 112 minutes apart, combined with near-simultaneous space observations. The eclipse was observed at the beginning of solar cycle 24, during a deep solar minimum (officially estimated as 2008 December according to the smoothed sunspot number, but very extended). The solar corona shows several different types of features (coronal holes, polar rays, helmet streamers, faint loops, voids, etc.), though it was extremely sparse in streamers as shown from Large-Angle Spectroscopic Coronagraph data. No large-scale dynamical phenomena were seen when comparing the observations from the two sites, confirming that the corona was quiescent. We measure a Ludendorff flattening coefficient of 0.238, typical of solar minimum.
Anglický abstrakt
The white-light corona (WLC) during the total solar eclipse of 2009 July 22 was observed by several teams in the Moon's shadow stretching from India and China across the Pacific Ocean with its many isolated islands. We present a comparison of the WLC as observed by eclipse teams located in China (Shanghai region) and on the Enewetak Atoll in the Marshall Islands, with observations taken 112 minutes apart, combined with near-simultaneous space observations. The eclipse was observed at the beginning of solar cycle 24, during a deep solar minimum (officially estimated as 2008 December according to the smoothed sunspot number, but very extended). The solar corona shows several different types of features (coronal holes, polar rays, helmet streamers, faint loops, voids, etc.), though it was extremely sparse in streamers as shown from Large-Angle Spectroscopic Coronagraph data. No large-scale dynamical phenomena were seen when comparing the observations from the two sites, confirming that the corona was quiescent. We measure a Ludendorff flattening coefficient of 0.238, typical of solar minimum.
Klíčová slova česky
Key words: eclipses – Sun: chromosphere – Sun: corona – Sun: coronal mass ejections (CMEs) – Sun: magnetic topology – Sun: UV radiation
Klíčová slova anglicky
Key words: eclipses – Sun: chromosphere – Sun: corona – Sun: coronal mass ejections (CMEs) – Sun: magnetic topology – Sun: UV radiation
Rok RIV
2011
Vydáno
20.11.2011
Nakladatel
IOP Publishing
Místo
Bristol, Velká Británie
ISSN
0004-637X
Ročník
742
Číslo
1
Strany od–do
29–41
Počet stran
13
BIBTEX
@article{BUT75468,
author="Jay {Pasachoff} and Vojtěch {Rušin} and Metod {Saniga} and Hana {Druckmüllerová} and B. A. {Babcock},
title="Structure and Dynamics of the 2009 July 22 Eclipse White-light Corona",
year="2011",
volume="742",
number="1",
month="November",
pages="29--41",
publisher="IOP Publishing",
address="Bristol, Velká Británie",
issn="0004-637X"
}