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 (1015 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 2.5σ level in our data, while the peak hydrogen densities in the clumps reach 106 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.
|Journal||Monthly Notices of the Royal Astronomical Society: Letters|
|Publication status||Published - 2018|
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science