| Name: | Khushbu K. |
| Affiliation: | Indian Institute of Astrophysics, Bangalore |
| Conference ID : | ASI2024_304 |
| Title : | Detailed Spectroscopic Study of [WR] PNe IC 2003 |
| Authors : | Khushbu K.1, C. Muthumariappan1 |
| Authors Affiliation: | 1 Khushbu K., C. Muthumariappan Affiliation (Indian Institute of Astrophysics, Bangalore - 560034, India) |
| Mode of Presentation: | Poster |
| Abstract Category : | Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Abstract : | Planetary nebulae (PNe) are the end stage of low-to-intermediate mass star’s life occurring after the AGB phase before they attain white dwarf configuration. A considerable fraction (~16%) of the central stars of PNe show Wolf-Rayet ([WR]) phenomena and show different evolutionary mechanisms from normal PNe. Detailed radiative transfer modelling is required to unveil their intricate thermal and photo-ionization structures and to understand their unique evolutionary paths compared with normal ones. We present here a case study for [WR] PN IC 2003, which incorporates UV and optical medium-resolution spectroscopic data with IRAS photometric flux, absolute Hꞵ flux and the size of the emitting region to constrain the 1D Dusty photo-ionization model effectively. Notably, the presence of abundant small grains in [WR] PNe amplifies photoelectric heating, impacting nebular emission lines and excitation equilibrium balance. By considering various grain size distributions in our model, we address the significance of grain heating in the nebula and also identify the most appropriate grain size distribution. Our model revealed significant differences in abundances and central star parameters compared to empirically derived values using the ICF method and prior studies. The mass of IC 2003’s progenitor star was determined to be 3.263 solar mass. |
