Nordic-Baltic Astronomy Days 2026

Session

26-B3: Planets

Tu-10B

26 May 2026, 16:15

Room B

Description

Chair: Ulrike Heiter

254. Tracing the imprints of external irradiation on protoplanetary disks

Mari-Liis Aru (Imperial College London)

26/05/2026, 16:15

Oral

Protoplanetary disks emerge as a consequence of the star formation process, and provide the foundational material for planets. The evolution of these disks is governed by a combination of internal processes linked to the central star, and external influences from the surrounding environment. Both pathways produce photoevaporative winds that drive disk dispersal from opposite directions. In...

255. Searching for other Earths

Dainis Dravins (Lund Observatory, Lund University, Sweden)

26/05/2026, 16:30

Oral

Many exoplanets have been found, but still no Earth-like planet in a one-year orbit around a solar-type star. Limitations no longer stem from observations but from the physical variability of the host star, which greatly exceeds the radial-velocity modulation by an Earth-like planet. Current observational efforts are to find planets around our Sun, monitoring the Sun-as-a-star with extreme...

256. Are Stars Eating Burning Marshmallows? Insights into Hot Jupiter Systems

Alexandra Lehtmets (University of Tartu, Tartu Observatory)

26/05/2026, 16:45

Oral

Exoplanet atmospheres provide a direct window into planetary physics, chemistry, and long-term evolution. Through their composition and structure, we can probe processes such as irradiation, circulation, and mass loss, which ultimately shape how planets form and survive. Close-in gas giants, particularly hot and ultra-hot Jupiters, represent some of the most extreme laboratories for these...

257. Towards a homogeneous sample of M-dwarf properties and abundances for the PLATO mission

Nikki Miller (Uppsala University)

26/05/2026, 17:00

Oral

Over 70% of stars in the local solar neighbourhood are M-dwarfs, and they are frequent hosts of exoplanets. However, their cool, complex atmospheres and intrinsic faintness present significant observational and modelling challenges. The upcoming PLATO mission is expected to observe over 5000 early- to mid-type M-dwarfs, providing high-precision light curves for exoplanet detection, along with...

258. Characterizing the HD 110067 system of resonant exoplanets

Marylyn Rosenqvist

26/05/2026, 17:15

Oral

Resonant exoplanetary systems, in which the period ratio between consecutive planets is close to a natural number, are relatively rare in the universe. However, the fine-tuning required for these orbital configurations make resonant systems valuable for studying the early stages of planet formation and evolution. Additionally, the strong transit timing variations (TTVs) arising from the mutual...