The structure of a recent nova shell as observed by ALMA

Author(s)

Diaz, Marcos P. ^[1] ; Abraham, Zulema ^[1] ; Ribeiro, Valerio A. R. M. ^{[2, 3, 4]} ; Beaklini, Pedro P. B. ^[1] ; Takeda, Larissa ^[1]

Affiliation

^[1] Univ Sao Paulo IAG USP, Inst Astron Geofis & Ciencias Atmosfer, Dept Astron, Rua Matao 1226, BR-05508900 Sao Paulo - Brazil

^[2] Inst Telecomunicacoes, Campus Univ Santiago, P-3810193 Aveiro - Portugal

^[3] Univ Aveiro, Dept Fis, CIDMA, Campus Univ Santiago, P-3810193 Aveiro - Portugal

^[4] Radboud Univ Nijmegen, IMAPP, Dept Astrophys, POB 9010, NL-6500 GL Nijmegen - Netherlands

• Document type: Journal article
• Source: Monthly Notices of the Royal Astronomical Society; v. 480, n. 1, p. L54-L57, OCT 2018.
• Web of Science Citations: 2

Abstract

High resolution ALMA observations of the recent (2.52 yr old) shell of Nova V5668 Sgr (2015) show a highly structured ionized gas distribution with small (10(15) cm) clumps. These are the smallest structures ever observed in the remnant of a stellar thermonuclear explosion. No extended contiguous emission could be found above the 2.5 sigma level in our data, while the peak hydrogen densities in the clumps reach 10(6) cm(-3). The millimetre continuum image suggests that large scale structures previously distinguished in other recent nova shells may result from the distribution of bright unresolved condensations. (AU)

• FAPESP's process: 09/54006-4 - A computer cluster for the Astronomy Department of the University of São Paulo Institute of Astronomy, Geophysics and Atmospheric Sciences and for the Cruzeiro do Sul University Astrophysics Center
• Grantee: Elisabete Maria de Gouveia Dal Pino
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 14/07460-0 - Targets for LLAMA: study of variability of radio sources at 43 GHz (band 1) and search for correlation with interferometric images
• Grantee: Pedro Paulo Bonetti Beaklini
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 15/16489-4 - Spatially resolved multiwavelength models of nova shells
• Grantee: Marcos Perez Diaz
• Support Opportunities: Research Grants - Visiting Researcher Grant - International
• 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