Using Sidereal Rotation Period Expressions to Calculate the Sun’s Rotation Period through Observation of Sunspots

Abstract

We utilize sidereal rotation period expressions to calculate the sun’s rotation period via sunspot observation. From the well-known astronomical sites, we collected sunspot diagrams for 14 months, from January 2013 to February 2014, to analyze, compare, and implement statistical research. In addition to acquiring the average angular rate of the movement of sunspots, we found that even the same number of sunspots moved at different angular rates, and generally the life of larger sunspots is longer than 10 days. Therefore the larger sunspots moved around the back of the sun, and a handful of relatively smaller sunspots disappeared within a few days. The results show that the solar rotation period varied with the latitude. However, if we take the average of the sunspots at high and low latitudes, we find that the calculated value is very close to the accredited values.

Study of Limb Darkening Effect and Rotation Period of Sun by using Solar Telescope

“…Thus we find the synodic time period which comes out to be 26.94 days and with the help of the synodic time period we have calculated the sidereal time period which comes out to be 25.09 days. Chen et al, (2015) have also computed the sidereal rotation period of 25 days around equator.…”

Corrigendum to “Using Sidereal Rotation Period Expressions to Calculate the Sun’s Rotation Period through Observation of Sunspots”

“…In the article titled "Using Sidereal Rotation Period Expressions to Calculate the Sun's Rotation Period through Observation of Sunspots" [1], there was an error in Table 1, which should be corrected as shown in Table 1 Submit your manuscripts at https://www.hindawi.com…”