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| 001 | 904521 | ||
| 005 | 20220930130335.0 | ||
| 024 | 7 | _ | |a 10.3847/1538-4357/ac19aa |2 doi |
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| 100 | 1 | _ | |a Pfalzner, Susanne |0 P:(DE-Juel1)177668 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Close Stellar Flybys Common in Low-mass Clusters |
| 260 | _ | _ | |a London |c 2021 |b Institute of Physics Publ. |
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| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a Numerous protoplanetary disks show distinct spiral arms features. While possibly caused by a range of processes, detailed pattern analysis points at close stellar flybys as cause for some of them. Surprisingly, these disks reside in young low-mass clusters, where close stellar flybys are expected to be rare. This fact motivated us to take a fresh look at the frequency of close flybys in low-mass clusters. In the solar neighborhood, low-mass clusters have smaller half-mass radii than their more massive counterparts. We show that this observational fact results in the mean and central stellar density of low-mass clusters being approximately the same as in high-mass clusters, which is rarely reflected in theoretical studies. We perform N-body simulations of the stellar dynamics in young clusters obeying the observed mass–radius relation. Taking the mean disk truncation radius as a proxy for the degree of influence of the environment, we find that the influence of the environment on disks is more or less the same in low- and high-mass clusters. Even the fraction of small disks (<10 au) is nearly identical. Our main conclusion is that the frequency of close flybys seems to have been severely underestimated for low-mass clusters. A testable prediction of this hypothesis is that low-mass clusters should contain 10%–15% of disks smaller than 30 au truncated by flybys. These truncated disks should be distinguishable from primordially small disks by their steep outer edge. |
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| 588 | _ | _ | |a Dataset connected to CrossRef, Journals: juser.fz-juelich.de |
| 700 | 1 | _ | |a Govind, Amith |0 P:(DE-Juel1)184730 |b 1 |u fzj |
| 773 | _ | _ | |a 10.3847/1538-4357/ac19aa |g Vol. 921, no. 1, p. 90 - |0 PERI:(DE-600)1473835-1 |n 1 |p 90 - |t The astrophysical journal / 1 |v 921 |y 2021 |x 0004-637X |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/904521/files/Invoice_8198278.pdf |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/904521/files/Pfalzner_2021_ApJ_921_90.pdf |y OpenAccess |
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