Solar eclipse

About: Solar eclipse is a research topic. Over the lifetime, 2737 publications have been published within this topic receiving 22625 citations.

Highlighting the history of french radio astronomy. 2: the solar eclipse observations of 1949-1954

Abstract: During the 1940s and early 1950s radio astronomers from a number of nations used observations of total and partial solar eclipses to investigate the positions of radio-emitting regions and to determine the distribution of radio emission across the solar disk. Between 1949 and 1954 French radio astronomers from the Ecole Normale Superieure and the Institute of Astrophysics between them mounted four successful eclipse expeditions to Africa and northern Europe. This short paper lists the personnel involved, discusses their instrumentation, describes the observations made, and evaluates the significance of these observations in an international context.

The J- and K-Band Brightness of the Solar F Corona Observed during the Solar Eclipse on 1998 February 26

Abstract: We analyze J- and K-band observations of the 1998 solar eclipse and derive the F-corona brightness in the K band between 3 and 7 R☉ from the center of the Sun and in the J band out to 5 R☉. The falloff in the K-band brightness from 3 to 7 R☉ is fitted with a radial power law with exponent -2.4 ± 0.1 at the solar equator and with exponent -2.9 at the solar pole. This slope is gentler than that derived from observations in 1983 but is steeper than that derived from observations for the 1991 eclipse. The radial profiles agree well with models that explain the F corona with weakly absorbing dust particles. Comparison of the J- and K-band brightness at 3 R☉ from the center of the Sun indicates a reddening of the F corona with respect to the solar spectrum. The reddening is, however, less pronounced compared to the F corona observed during the 1983 total solar eclipse. This fact may be attributed to a change in the composition of dust near the Sun. As with the radial profiles, the reddening in 1998 is better explained with models that assume weakly absorbing rather than strongly absorbing dust particles in the solar corona. Similar to recent eclipse observations, we do not detect an excess emission feature of near-solar dust in the F corona. We hence can reject the hypothesis that suggests a correlation between the detection of an emission feature and the solar activity cycle.

Unusual enhancement in temperature and ozone vertical distribution in the lower stratosphere observed over Gadanki, India, following the 15 January 2010 annular eclipse

Abstract: [1] Extensive observations on various atmospheric parameters were carried out from Gadanki (13.48°N, 79.18°E), a tropical station in India, during the annular solar eclipse of 15 January 2010. In the present study, we report changes observed in temperature and ozone concentration in the lower stratosphere associated with the eclipse. Unusual enhancements in the temperature of 12.5 K and in ozone concentration of 5.5. mPa are observed around 21 km just after the eclipse. Plausible mechanisms for the observed eclipse effects are discussed using data of simultaneous vertical and horizontal winds collected through co-located MST radar observations. From the preliminary analysis, the temperature and ozone enhancements are attributed to large subsidence and horizontal advection, respectively.

The interaction of cultural rituals and the concepts of science in student learning: a case study on solar eclipse

Abstract: Socio‐cultural experience as a possible generative cause of alternative conceptions in a group of pupils is investigated in the framework of the natural phenomenon of solar eclipse. The curriculum significance of the outcomes is discussed.