The formation and long-term evolution of circumbinary planetary systems across the H-R diagram

Session

CB disc properties and planet formation

Session 1

14 Jan 2025, 09:55

Fuligno Cenacle

1. Observations of circumbinary discs and their alignment across a range of stellar populations

Ian Czekala

14/01/2025, 09:55

Circumbinary planets form from material in protoplanetary disks. Therefore it is reasonable to expect that planets would inherit their orbits from the distribution of this material, at least in a broad and initial sense. In this talk, I will review observations of circumbinary material across stellar ages: from the earliest protostellar and class 0/I systems, through the "classic" class II...

2. Observations of multiple body systems with ALMA

Maria Jose Maureira

14/01/2025, 10:30

The physical properties and dynamics of the youngest multiple protostellar systems and their disks have remained largely unconstrained due to their embedded nature. In this talk, I will discuss recent high-resolution ALMA observations, which are beginning to resolve the gas and dust emission within individual and circumbinary disk structures during the earliest stages of formation. These...

3. Phased accretion and a dynamically-truncated eccentric circumbinary disc cavity in a pre-main-sequence binary system

Stefan Kraus

14/01/2025, 11:35

Pre-main-sequence binary systems provide a unique laboratory for studying dynamical truncation in discs. We studied the inner region of a nearby Herbig Ae/Be binary system using the VLTI/GRAVITY and VLTI/PIONIER instrument. Spectrally-dispersed interferometry with GRAVITY allowed us to determine the origin of the Br γ line emission and to study how the accretion rates on the primary and...

4. Hints of planet formation signatures in a large-cavity disk studied in the AGE-PRO ALMA Large Program

Anibal Sierra

14/01/2025, 12:10

Detecting signatures of planet formation in protoplanetary disks is essential for understanding how and where planets form. In this talk, I will present dust and gas observations of the disk around 2MASS J16120668-301027, studied as part of the ALMA Large Program 'AGE-PRO: ALMA Survey of Gas Evolution in Protoplanetary Disks,' where several indicators of planet formation were recently...

5. Stellar binary formation and the disc properties of binary systems

Matthew Bate

14/01/2025, 14:00

I will discuss the formation mechanisms and resulting properties of stellar binary systems that are obtained from radiation hydrodynamical simulations of star cluster formation. I will also discuss the properties of the protoplanetary discs that are formed with these systems, concentrating on the frequencies and properties of circumbinary discs.

6. Evolution of stellar binaries surrounded by circumbinary disks

Dong Lai

14/01/2025, 14:35

I will discuss the hydrodynamics of circumbinary disks and how it impacts the binary evolution of the formation of planets.

7. Kinematic signatures of circumbinary disks

Enrico Ragusa

14/01/2025, 15:10

Systems where two gravitationally bound masses (the primary mass and its binary companion) interact with the surrounding gas and dust are extremely common in the Universe and encompassing a wide variety of different astrophysical systems, from stars and planets to black holes. Extensive theoretical and numerical work from the late 1970s revealed that the material in the surroundings of...

8. Polar discs and circumbinary formation in highly misaligned discs

Jeremy Smallwood

14/01/2025, 16:15

Most stars born in dense stellar clusters are part of binary star systems. Circumbinary discs of gas and dust commonly surround binary star systems. Misalignments between the circumbinary disc and the binary orbital plane are widely observed. A misaligned circumbinary disc undergoes nodal precession. For a low initial inclination, the precession is around the binary angular momentum vector,...

9. Hydrosimulations of circumbinary discs hosting circumbinary planets

Arnaud Pierens

14/01/2025, 16:50

Formation and evolution of circumbinary planets are strongly related to the physics of their native circumbinary discs. Having a comprehensive picture of circumbinary discs is therefore a prerequisite for understanding these processes. Given the sensitivity of the circumbinary disc structure to the detailed disc physics, this requires realistic circumbinary disc modelling. In this talk, we...

10. Planet-disk interaction in circumbinary disks

Anna Penzlin

15/01/2025, 09:15

"As of today we have about a dozen confirm planets that orbit both binary stars. These planets must have formed and evolved in the protoplanetary, circumbinary disc. To gain a full understanding of the observed planet we need to trace them backwards in time and investigate the planet migration within the disc and how the binary potential can dictate the final orbit of the planets and how the...

11. The formation of circumbinary terrestrial planets via core accretion

Anna Childs

15/01/2025, 09:50

Using a combination of N-body simulations and hydrodynamic models, we explore how terrestrial planets form around binary stars through planetesimal accretion. We consider planet formation around both circular and eccentric binaries and in planetesimal disks that are coplanar, polar, or misaligned to the binary orbital plane. We find that terrestrial planet formation via core accretion around...