From Disk Formation to Exoplanetary Systems

Session

Morning Session

22 Sept 2025, 09:00

Eridanus Auditorium (ESO Headquarters)

22. Registration & Welcome

22/09/2025, 09:00

11. Characterization of the Carina OB1 association

Christiane Göppl

22/09/2025, 09:15

The Carina OB1 association is one of the most massive, well-studied star-forming regions in our Galaxy, which is the kind of environment where most of the planets in our Galaxy are formed. We aim to characterize the association's stellar population as stellar clusters and high-mass stars heavily influence planets and disks. We therefore used the Gaia DR3 catalog to identify clusters and their...

20. Observing proplyds with MUSE

Mari-Liis Aru

22/09/2025, 09:30

In clusters with OB-type stars, UV radiation affects the evolution of protoplanetary disks via external photoevaporation. The resulting depletion of disks can be studied in resolved observations of proplyds, where neutral gas is outflowing from the disk and becomes photoionized as it expands and interacts with stellar UV radiation. VLT/MUSE allows us to characterize proplyds in a wealth of...

17. Magnetospheric accretion onto Herbig Ae/Be stars

Markus Schöller (European Southern Observatory)

22/09/2025, 09:45

Herbig Ae/Be stars are surrounded by active accretion disks, as evidenced from excess emission seen in various wavelength regions. From studies of the Zeeman effect in polarimetric spectra of these PMS stars, it is clear that HAeBes host dipolar magnetic fields, which are about a magnitude weaker than those in their lower mass counterparts, the T Tauri stars.

While these weaker magnetic...

14. Tracing Young binaries with Multi-wavelength Approach

Hala Alqubelat (European Southern Observatory)

22/09/2025, 10:00

Accreting binary systems exhibit complex, multi-wavelength variability shaped by their interactions with circumstellar and circumbinary material. DQ Tau, highly eccentric (e = 0.6), equal-mass binary with a 15.7-day period, is a prime target to investigate accretion physics and disk structure in young binaries. With its short orbital period, DQ Tau owns three accretion disks and strongly...

15. Formation of protostars and their accretion disks in the turbulent and magnetized interstellar medium

Alexander Mayer (Max-Planck-Institute for Astrophysics)

22/09/2025, 10:15

While recent observations of young protostellar disks have revealed much about their structure, their formation process from molecular cloud cores and subsequent evolution remains relatively poorly understood. In particular, the role of the magnetic field in regulating the angular momentum budget of the system is a central issue. In this talk, zoom-in simulations from a turbulent interstellar...

7. Disk properties during the earliest stages of star and planet formation

Maria Jose Maureira (MPE)

22/09/2025, 10:45

Characterizing the physical conditions of disks surrounding young protostars that are still actively accreting from their surroundings is crucial to understanding the mass assembly process of stars and the mechanisms for early planet formation. While the majority of theoretical investigations into the first steps to form planetesimals are still using physical properties akin to more evolved...

10. The origin of chemical complexity: in the earth of young forming planetary system.

Marta De Simone

22/09/2025, 11:00

The earliest phases of planetary system formation are marked by a fascinating and intricate chemistry, with a high abundance of prebiotic molecules detected in protostellar environments. This chemical complexity serves as a crucial diagnostic tool to understand the underlying physical processes shaping these nascent systems, and to probe the chemical evolution from prestellar core to more...

3. On the use of Gaia astrometry to indentify companions in forming stars

Miguel Vioque (miguel.vioque@eso.org)

22/09/2025, 11:15

I will show how to use Gaia astrometry to indentify binaries and companions in forming stars. I will exemplify the power of this technique with a few science cases, from newly identified protoplanets within the gaps and cavities of protoplanetary disks to a reassesment of the multiplicity of the populations of circumbinary and transition disks. I will conclude looking forward to the upcoming...

16. Characterizing the dust in the outer regions of protoplanetary disks with ALMA

Sreejita Das (European Southern Observatory)

22/09/2025, 11:30

The dust mass budget of protoplanetary disks plays an important role in planet formation. However, ALMA surveys often underestimate disk masses as many disks have extended low surface-brightness regions at hundreds of au that fall below ALMA's sensitivity limits. This may contribute to the mass-budget problem where exoplanetary systems appear to be more massive than disks. In this talk, I will...

21. Understanding dust evolution in protoplanetary disks

Elena Viscardi (ESO)

22/09/2025, 11:45

Dust plays a fundamental role in the formation of planets, acting as the primary building block from which planetary systems emerge. To understand the origins and diversity of the planetary systems observed throughout the galaxy, including our own Solar System, it is essential to investigate how micron-sized, amorphous dust grains found in the interstellar medium are transformed into the...