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Cover Page The handle http://hdl.handle.net/1887/138010 holds various files of this Leiden University dissertation. Author: Trapman, L. Title: Sizing up protoplanetary disks Issue date: 2020-11-05

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Cover Page

The handle

http://hdl.handle.net/1887/138010

holds various files of this Leiden

University dissertation.

Author: Trapman, L.

Title: Sizing up protoplanetary disks

Issue date: 2020-11-05

(2)

Propositions

accompanying the thesis

Sizing up protoplanetary disks

1. To study the radial drift of dust grains, focus on the opacity of the gas

[ Chapters 2 & 3 ]

2. Disk winds remain a viable option for the transport of angular momentum in disks [ Chapter 4 ]

3. Chemical conversion of CO does not by itself explain the low observed CO isotopolog

line fluxes [ Chapter 5 ]

4. Even when not detected, HD lines provides crucial information about protoplanetary

disks [ Chapter 6 ]

5. Our understanding of protoplanetary disks cannot be complete without a far-infrared observatory

6. A portion of observing time should be given to projects selected at random

7. Scientific software should be treated just like other contributions to a paper

8. Going forward, live conferences should also be open for online participation

9. The challenge of a PhD is doing many projects at once but finishing them one by one

10. Managing the deadlines of your collaborators is sometimes more important than managing your own

11. Taking the stairs has both short and long term benefits

12. Like most cocktails, protoplanetary disks are better appreciated if well mixed

Leon Trapman Leiden, 5 november 2020

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