Revising abundances of nova shells

• Grant number: 22/02471-0
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: August 15, 2022
• End date: August 01, 2023
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Stellar Astrophysics
• Principal Investigator: Marcos Perez Diaz
• Grantee: Larissa Takeda
• Supervisor: James Edward Lyke
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: W.M. Keck Observatory, United States
• Associated to the scholarship: 19/08341-8 - On the lithium mass ejected in novae: a current analysis, BP.PD

Abstract

Novae are frequent eruptive events in the Galaxy, with estimates as high as ~50 occurrences per year, and are known to contribute to the ISM enrichment. The abundances and mass determinations of nova ejecta usually present large uncertainties due to the complex emission spectra and by the small (in the order of a few arcsec) and often clumpy asymmetrical shell. Thus, the observation of nova remnants highly benefits from adaptive optics (AO) technology, that improves the image quality, and spatially resolved spectroscopy, that can simultaneously map different sections of the shell. In this BEPE project we propose observations of nova remnants performed at Keck Observatory, with the AO assisted near-infrared integral field spectrograph OSIRIS. The observational data will be modeled with our photoionization code RAINY3D in order to study the physical and chemical properties of the gas and dust, and possible relations between them. (AU)