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SUMMARY:Capturing the evolution of RS Ophiuchi's 2021 nova explosion with 
 the European VLBI network
DTSTART;VALUE=DATE-TIME:20240904T094500Z
DTEND;VALUE=DATE-TIME:20240904T100000Z
DTSTAMP;VALUE=DATE-TIME:20260307T093222Z
UID:indico-contribution-99@cern.ch
DESCRIPTION:Speakers: Dr. LICO\, Rocco (INAF-IRA)\nNova outbursts are powe
 rful astronomical events occurring in binary star systems\, where a white 
 dwarf accumulates material from its companion star until a critical pressu
 re and temperature are reached and trigger a thermonuclear outburst.\nIn t
 his talk we'll focus on the well known recurrent and symbiotic nova RS Oph
 iuchi (RS Oph) that experienced a new outburst in August 2021\, representi
 ng the first nova ever detected at very-high energies (E>100 GeV). In this
  context\, we present the results of a very long baseline interferometry (
 VLBI) monitoring with the European VLBI Network (EVN) at 1.65 and 5 GHz\, 
 performed from 14 to 65 days post-explosion. We characterized in great det
 ail the evolving morphology of the expanding bipolar ejecta and determined
  the physical conditions of the surrounding medium. We estimated the expan
 sion speed of the two elongated bipolar outflows\, the white dwarf accreti
 on rate\, the mass loss rate of the companion star\, the radial evolution 
 of the surrounding medium density\, as well as the properties of the densi
 ty enhancement on the orbital plane.\n\nhttps://events.mpifr-bonn.mpg.de/i
 ndico/event/371/session/11/contribution/99
LOCATION:CJD Bonn Castell
URL:https://events.mpifr-bonn.mpg.de/indico/event/371/session/11/contribut
 ion/99
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