Multiplicity in Young Stars

Session

Accretion and variability in multiple systems

28 Aug 2025, 13:10

Niels Bohr Institute

Conveners

Accretion and variability in multiple systems

• Rajika Kuruwita

Accretion and variability in multiple systems

• Rajika Kuruwita

31. Accretion variability and multiplicity

Dr Ágnes Kóspál (Konkoly Observatory)

28/08/2025, 13:10

In this talk, I will summarize our current knowledge about accretion in multiple systems. I will talk about the structure of the circumstellar environment depending on the separation of the components and its potential effects on the disc-to-star accretion rate. I will discuss two special cases: one is that of the pulsed accretors. These are close spectroscopic SB2 binaries on eccentric orbit,...

32. Simulated Analogues: connecting observations with simulations using Deep Learning

Mr Rami Al Belmpeisi (DTU), Mr Vito Tuhtan (Niels Bohr Institute)

28/08/2025, 13:50

Recent advances in observations and theory show increasing evidence that star formation is a multi-scale problem. Global simulations that properly account for the connection from the large-scale gas flow to the accreting protostar can be used to understand protostellar systems in such a context. Given the turbulent nature of the initial conditions, it is challenging to compare models directly...

33. The NGC 6334-43 field with ALMA: protostellar multiplicity and a young streamer-fed protobinary

Mr David Taylor (University of St Andrews)

28/08/2025, 14:10

Massive stars (> 8 Msun) are likely found in binaries or higher order multiples throughout their lives; however, due to observational challenges, the relative importance of the formation mechanisms giving rise to this multiplicity are not well constrained. The youngest multiple systems, whose system parameters best constrain theoretical models, are the most deeply embedded, and in the...

34. Multiplicity and Inner Disk Reshaping in the Extreme Accretion Event of FUor V960 Mon

Mr Daniel Daza Valdebenito (Niels Bohr Institute)

28/08/2025, 14:50

V960 Mon is a recent FUor that underwent an accretion outburst in 2014. These extreme accretion events are transient stages in the stellar evolution, each detection is a rare gem for our understanding of how stars gain their mass and interact with their environment. Particularly, V960 has been observed shortly after its outburst with VLT/SPHERE and ALMA. Recently, these observations revealed...

35. Accretion Variability and Binarity in Young Stars: Insights from DQ Tau and Transition Disks

Ms Hala Alqubelat (European Southern Observatory)

28/08/2025, 15:10

Accreting binary systems interact with their circumstellar and circumbinary environments, leading to variability across multiple wavelengths and timescales. Understanding these variations is essential for constraining accretion physics and disk structures. With its nearly pole-on orientation, DQ Tau allows a detailed investigation of accretion variability across different wavelengths. DQ Tau...