Abstract Gas mass is a fundamental quantity of protoplanetary disks that directly relates to their ability to form planets. Because we are unable to observe the bulk H 2 content of disks directly, we rely on indirect tracers to provide quantitative mass estimates. Current estimates for the gas masses of the observed disk population in the Lupus star-forming region are based on measurements of isotopologues of CO. However, without additional constraints, the degeneracy between H 2 mass and the elemental composition of the gas leads to large uncertainties in such estimates. Here, we explore the gas compositions of seven disksmore »
Constraining disk evolution prescriptions of planet population synthesis models with observed disk masses and accretion rates
While planets are commonly discovered around main-sequence stars, the processes leading to their formation are still far from being understood. Current planet population synthesis models, which aim to describe the planet formation process from the protoplanetary disk phase to the time exoplanets are observed, rely on prescriptions for the underlying properties of protoplanetary disks where planets form and evolve. The recent development in measuring disk masses and disk-star interaction properties, i.e., mass accretion rates, in large samples of young stellar objects demand a more careful comparison between the models and the data. We performed an initial critical assessment of the assumptions made by planet synthesis population models by looking at the relation between mass accretion rates and disk masses in the models and in the currently available data. We find that the currently used disk models predict mass accretion rate in line with what is measured, but with a much lower spread of values than observed. This difference is mainly because the models have a smaller spread of viscous timescales than what is needed to reproduce the observations. We also find an overabundance of weakly accreting disks in the models where giant planets have formed with respect to observations of more »
- Award ID(s):
- 1907486
- Publication Date:
- NSF-PAR ID:
- 10170414
- Journal Name:
- Astronomy & Astrophysics
- Volume:
- 631
- Page Range or eLocation-ID:
- L2
- ISSN:
- 0004-6361
- Sponsoring Org:
- National Science Foundation
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