Efficient Dust Radial Drift Around Young Intermediate-mass Stars
arXiv:2206.03057 · doi:10.1051/0004-6361/202243637
Abstract
The radial velocities and direct imaging observations of exoplanets have suggested that the frequency of giant planets may decrease for intermediate-mass stars (). The key mechanism that could hinder their formation remains unclear. From a theoretical point of view, planet formation around intermediate-mass stars may take place on longer timescales, which -- coupled with fast migration and efficient photoevaporation -- may prevent planetary formation in these environments. In this letter, we investigate the temporal evolution of the radial drift for dust particles in disks when stellar evolution is taken into account. We demonstrate that the particle drift velocity around intermediate-mass stars sharply increases after 12 Myr, potentially forming a difficult barrier to overcome in the first steps of planet formation. This high radial drift could explain the lack of disk detections around intermediate-mass stars older than 34 Myr, as opposed to low-mass stars (), where the drift may not be the most impactful factor for the disk evolution. Future high-resolution images of these disks can help us to explain why planets around intermediate-mass stars may be rare. In addition, we can explore whether the role of efficient dust radial drift does in fact hinder planet formation around intermediate-mass stars -- or otherwise.
Accepted for publication in A&A (Letters). Minor changes after language edition
References in corpus (15)
- The Dartmouth Stellar Evolution Database
- Planet formation around stars of various masses: The snow line and the frequency of giant planets
- Toward a Deterministic Model of Planetary Formation V. Accumulation Near the Ice Line
- Precise Radial Velocities of Giant Stars VII. Occurrence Rate of Giant Extrasolar Planets as a Function of Mass and Metallicity
- Circumstellar disks around Herbig Be stars
- Disks Around T Tauri Stars with SPHERE (DARTTS-S) II: Twenty-one new polarimetric images of young stellar disks
- Are Inner Disc Misalignments Common? ALMA Reveals an Isotropic Outer Disc Inclination Distribution for Young Dipper Stars
- Size and structures of disks around very low mass stars in the Taurus star-forming region
- Growing and Trapping Pebbles with Fragile Collisions of Particles in Protoplanetary Disks
- A wide-orbit giant planet in the high-mass b Centauri binary system
- The mass and size of Herbig disks as seen by ALMA
- A Census of the Circumstellar Disk Populations in the Sco-Cen Complex
- Irregular dust features around intermediate-mass young stars with GPI: signs of youth or misaligned disks?
- BEAST begins: Sample characteristics and survey performance of the B-star Exoplanet Abundance Study
- A scaled-up planetary system around a supernova progenitor