Name: Gesesew Reta Habtie
Affiliation: S.N. Bose National Centre for Basic Sciences
Conference ID : ASI2022_327
Title : Photoionization and Morpho-kinematic Study of Nova V477 Scuti
Authors : Gesesew Reta Habtie, Ramkrishna Das, Ruchi Pandey, Rahul Bandyopadhyay.
Abstract Type: Poster
Abstract Category : Stars, ISM and Galaxy
Abstract : In this study, we investigate the photoionization process and morpho-kinematics of nova V477 Scuti to understand the process and estimate the 3D structure of the ejecta. Nova V477 Scuti was discovered in outburst on October 11, 2005. The observation was monitored from the 1.2 m InfraRed Telescope at Mount Abu. The Near-Infrared (NIR) JHK- spectroscopy (1.08-2.35 µm) of V477 Scuti is found to be a type of classical nova and shows prominent H I emission lines. We extracted the JHK bands data observed on the 10th date of the outburst and modeled the spectra using the photoionization code CLOUDY C17.02. The spectra obtained at different epochs are modeled to study the evolution of the physical and chemical properties. From the best fit model, we estimated the values of various physical and chemical parameters like the temperature and luminosity of the central compact object, and the density and elemental abundances of the ejecta. The 3D modeling which is mainly intended to study the geometry of the ejecta is also particularly done for the 10th day from the outburst in NIR domain, using SHAPE V5. The line profile in most cases has prominent triple and above peak features along with two smaller peaks in both red and blue sides of the central peak. A Gaussian spectral fitting of those spectral lines is done to estimate the radial velocity displacement and hence an estimation of the relative dimension of the components was obtained. Several synthetic spectra, as well as data points, are generated with different parameter sets of inclination and velocity. Finally, we obtained the Position velocity (P-V) diagram which shows how the velocity varies with distance and the best fit modeled velocity profile of the selected three lines among the three bands.