| Name: | Suman Bhattacharyya |
| Affiliation: | CHRIST (Deemed to be University), Bangalore |
| Conference ID : | ASI2024_547 |
| Title : | Understanding the mysteries of Classical Be stars: spectral dynamics and periodic surprises |
| Authors : | Suman BhattacharyyaA1, Blesson MathewB1, Gourav BanerjeeC1 |
| Authors Affiliation: | 1 CHRIST (Deemed to be University), Bangalore, Karnataka-560029, India |
| Mode of Presentation: | Poster |
| Abstract Category : | Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Abstract : | In this study, we are conducting an investigation into the photometric periods and H-alpha emission lines of 94 classical Be stars to comprehensively examine their spectral characteristics and period variations. We compare H-alpha equivalent width (EW) measurements from spectra obtained with the Himalayan Chandra Telescope's 2-meter telescope facility in India and leverage data from the Transiting Exoplanet Survey Satellite (TESS) and epoch data to identify significant variations. Preliminary analysis reveals that 14 percent of the stars exhibit low-frequency spectra, while 86 percent display mid-frequency periods within the range of 0.33 to 1.45 days, consistent with earlier research. We acknowledge the potential underestimation of the low-frequency sample due to the limited dataset. Most stars exhibit Hα EW values ranging from -41.3 to 11.8 Angstrom, aligning with the mid-frequency period range, but 11 candidates deviate, showing longer-term trends within this range. Ongoing research will expand the sample size to better understand low-frequency variations, high-period outliers, and their implications for the overall variability of classical Be stars. |
