| Name: Vivek Kumar Singh |
| Affiliation: Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj |
| Conference ID: ASI2026_149 |
| Title: Rotational characteristics of X-ray Solar Corona |
| Abstract Type: Poster |
| Abstract Category: Sun, Solar System, Exoplanets, and Astrobiology |
| Author(s) and Co-Author(s) with Affiliation: Vivek Kumar Singh(SHUATS, Prayagraj, 211007, India), Ved Prakash Gupta(SHUATS, Prayagraj, 211007, India), satish chandra(PPN (PG) College, Kanpur, 208001, India) |
| Abstract: Rotational characteristic of the Sun is still undecided concern of solar physics. Solar rotation can be estimated by methods i.e. helioseismology, tracing of features, spectroscopic analysis and modulation of the emitted solar flux. Sun exhibits differential rotation. Solar rotation varies as function of not only altitude and latitude but also dependent on phases of the solar cycle. Hinode a Japanese’s solar mission launched into space in September 2006 to observe how magnetic energy transmitted from photosphere to corona and consequences in the form of volatile energy release. Onboard instrument X-ray telescope (XRT) captures high resolution images of solar corona to study coronal magnetic field. Since its launch into space, Hinode has brought remarkable imagery and important measurements of Sun for last 18 years. In the present work, we use time series analysis on equally separated bins formed on latitude regions of the solar full disc (SFD) images observed by Hinode/XRT that extend from 80oS to 80oN. The flux modulation method traces the track of X-ray feature over the solar disc and periodogram analysis of the annual time series data of the X-ray images (one per day) for the period extends from year 2007 to 2025 gives the coronal rotation period as a function of latitude. Annual rotational profile is fitted with a polynomial equation to find differential rotational coefficients. To estimate variation in solar rotation with different phases of solar cycle, the differential coefficients are plotted with annual sunspot numbers of the study period. The study provides a thorough and systematic evidence of the solar rotation and its variability with latitude as well as with solar activity cycle. It also has been established that solar atmosphere exhibits differential rotation and the differentiality has a substantial temporal variation as well as spatial variation. Detail result would be presented in the paper. |
