期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 481, 期 1, 页码 452-466出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sty2323
关键词
accretion, accretion discs; hydrodynamics; protoplanetary discs; circumstellar matter; photodissociation region (PDR); planetary systems: formation
资金
- Imperial College London Junior Research Fellowship
- DISCSIM project - European Research Council [341137]
- BIS National E-infrastructure capital grant [ST/J005673/1, ST/K001590/1]
- STFC [ST/H008586/1, ST/K00333X/1]
- STFC capital grants [ST/H008861/1, ST/H00887X/1]
- STFC DiRAC Operations grant [ST/K00333X/1]
- STFC [ST/M007065/1, ST/H008861/1, 1644105, ST/H008586/1, 1993451, ST/K00333X/1, ST/H00887X/1, ST/K001590/1, ST/J005673/1] Funding Source: UKRI
We present an open access grid of 3930 calculations of externally evaporating protoplanetary discs. This spans a range of disc sizes (1-400 au), disc masses, UV field strengths (10-10(4) G(0)), and stellar masses (0.05-1.9 M-circle dot). The grid is publicly available for download, and offers a means of cheaply including external photoevaporation in disc evolutionary calculations. It can also be queried using an online tool for quick estimates of instantaneous mass-loss rates (e.g for convenient evaluation of real observed systems). The AAFRIED grid itself illustrates that for discs around stars <= 0.3 M-circle dot, external photoevaporation is effective down to small radii (<50 au) down to UV fields at least as weak as 10 G(0). At the other end of the scale, in a 104 G0 environment photoevaporation is effective down to 1 au even for stellar masses at least as high as 1.9 M-circle dot. We also illustrate in which regimes CO survives in the photoevaporative outflow for significant mass-loss rates; marking a system a good candidate to detect external photoevaporation in weak-intermediate UV environments through sub-Keplerian rotation. Finally, wemake illustrative mass-loss rate estimates for discs in Taurus based on the Guilloteau et al. (2011) star-disc parameters, finding that around half are expected to have both significant mass-loss and retain CO in the photoevaporative outflow.
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