| Name: | Snigdha Sarmah |
| Affiliation: | Tezpur University |
| Conference ID: | ASI2025_405 |
| Title: | Probing Stellar Variability in Spitzer Bands: Insights into Type II SNe Progenitors |
| Authors: | Snigdha Sarmah 1, Rupak Roy 2, P. Shalima 2, Rupjyoti Gogoi 1 |
| Authors Affiliation: | 1 Department of Physics, Tezpur University, Napaam, 784028, Assam, India
2 Manipal Centre of Natural Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India |
| Mode of Presentation: | Poster |
| Abstract Category: | Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Abstract: | This work investigates the variability of Type II SN progenitors using mid-infrared data from the
Spitzer Space Telescope's IRAC channels, providing insights into the late stages of massive star
evolution. A sample of SNe, all located within 15 Mpc and having exploded in the last decade, was
chosen based on pre-explosion IRAC observations covering several epochs. Photometric
techniques were applied to extract light curves of the progenitor stars, enabling a detailed analysis
of their variability over time. The Lomb-Scargle periodogram was employed to search for periodic
signals, revealing possible pulsational behavior in the progenitors. Additionally, the post-explosion
light curves for a few of these SNe were examined, offering a comparative look at the progenitors
before and after the explosions. |
