Nadejda Blagorodnova - Illuminating Binary Evolution Through Luminous Red Novae & Dusty Aftermath

#Colloquium

Title: "Illuminating Binary Evolution Through Luminous Red Novae and Their Dusty Aftermath"
Speaker: Nadejda Blagorodnova (Universitat de Barcelona)

Binary stellar interactions are responsible for creating a wide range of astrophysical systems of interest, such as novae, thermonuclear supernovae, X-ray binaries, and gravitational wave sources. One of the most critical processes is the phase of common envelope (CE) evolution, which represents the culmination of an unstable mass transfer process in the binary system, when the companion quickly spirals into the envelope of the donor star and drives this gas outwards, leaving a compact binary or a fully coalesced star. The dynamical ejection of the donor’s envelope has been associated with a peculiar type of astrophysical transient events known as Luminous Red Novae (LRNe). Within the last decade, the start of operations of large time-domain surveys has allowed us to conduct a new observational approach to the CE phase in binary systems using LRNe. On the one hand, archival images and pre-outburst time domain data of detected progenitor systems have shown that a complex succession of mass transfer processes is responsible for the final dynamical onset of the CE ejection. On the other hand, the properties of the transients detected by these surveys have confirmed that shocks and interaction with previously ejected material represent the dominant energy source to power their luminosity. Finally, late times studies of LRNe remnants in infrared and mm wavelengths have also revealed copious dust formation, highlighting their role as important contributors to the ISM dust reservoir. In this talk I will summarise recent observational and modelling efforts that underscore the importance of LRNe as probes of late stage binary evolution and their role as dust factories.

Видео Nadejda Blagorodnova - Illuminating Binary Evolution Through Luminous Red Novae & Dusty Aftermath канала Institute of Space Sciences (ICE-CSIC)