Detail publikace

Structure and Dynamics of the 2009 July 22 Eclipse White-light Corona

PASACHOFF, J. RUŠIN, V. SANIGA, M. DRUCKMÜLLEROVÁ, H. BABCOCK, B.

Originální název

Structure and Dynamics of the 2009 July 22 Eclipse White-light Corona

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

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.

Klíčová slova

Key words: eclipses – Sun: chromosphere – Sun: corona – Sun: coronal mass ejections (CMEs) – Sun: magnetic topology – Sun: UV radiation

Autoři

PASACHOFF, J.; RUŠIN, V.; SANIGA, M.; DRUCKMÜLLEROVÁ, H.; BABCOCK, B.

Rok RIV

2011

Vydáno

20. 11. 2011

Nakladatel

IOP Publishing

Místo

Bristol, Velká Británie

ISSN

0004-637X

Periodikum

ASTROPHYSICAL JOURNAL

Ročník

742

Číslo

1

Stát

Spojené státy americké

Strany od

29

Strany do

41

Strany počet

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",
  journal="ASTROPHYSICAL JOURNAL",
  year="2011",
  volume="742",
  number="1",
  pages="29--41",
  issn="0004-637X"
}