3D photoionization models of nova V723 Cas

Author(s)

Takeda, L. ^[1] ; Diaz, M. ^[1] ; Campbell, R. ^[2] ; Lyke, J. ^[2]

Affiliation

^[1] Univ Sao Paulo, IAG, Rua Matao 1226, BR-05508900 Sao Paulo, SP - Brazil

^[2] WM Keck Observ, 65-1120 Mamalahoa Hwy, Kamuela, HI 96743 - USA

• Document type: Journal article
• Source: Monthly Notices of the Royal Astronomical Society; v. 473, n. 1, p. 355-365, JAN 2018.
• Web of Science Citations: 3

Abstract

We present modelling and analysis of the ejecta of nova V723 Cas based on spatially resolved infrared spectroscopic data from Keck-OSIRIS, with LGSAO (adaptive optics module). The 3D photoionization models include the shell geometry taken from the observations and an anisotropic radiation field, composed by a spherical central source and an accretion disc. Our simulations indicate revised abundances log(N-Al/N-H) = -5.4, log(N-Ca/N-H) = -6.4 and log(N-Si/N-H) = -4.7 in the shell. The total ejected mass was found as M-shell = 1.1 x 10(-5) M-circle dot and the central source temperature and luminosity are T = 280 000 K and L = 10(38) erg s(-1). The 3D models are compared to basic 1D simulations to demonstrate the importance of using more realistic treatments, stressing the differences in the shell mass, abundances and characterization of the central source. The possibility of V723 Cas being a neon nova and the puzzling central source features found are discussed. (AU)

• FAPESP's process: 14/10326-3 - Study of neon novae using data cubes and 3D photoionization modeling
• Grantee: Larissa Takeda
• Support Opportunities: Scholarships in Brazil - Doctorate