PhD at Kapteyn Astronomical Institute, Groningen

Orlin Koop | Linktree

Videos of the Laporte+19 simulation

Video of the rotation curve through the simulation

Video of the disk through the simulation

Video of the radial profiles through the simulation

Figure 2

Radial profiles

Blue shows the result for dr3 radial velocities and the Ou et al. spectrophotometric parallax.
Green is the same as blue.
Red is the same sample, but cut in [alpha/Fe]<0.12
Orange is the same as red but additionally a cut in |v_z|<100

Radial profiles for the sample from [5].

Figure 1

Jhelum and Sagittarius

Numbers in the panels denote the numbering of the results.

All 4 Jhelum simulation results

Simulation 2 of Jhelum with and without Sagittarius (with a higher pericenter orbit for Jhelum)

Simulation 3 of Jhelum with and without Sagittarius (final result is Figure 2 in the poster)

Simulation 4 of the Jhelum stream encountering Sagittarius (with two interactions)

Helmi streams and MOND

Newtonian versus MOND simulations of the Helmi streams

Orlin Koop

Enjoy 30 days of Hulu for FREE

Claim 10 free meals* from HelloFresh

Get 60% off Sitewide

Sip your way to stronger health with 30% off at ARMRA

Save 10% at Omnilux LED

Save 10% on Ritual Multivitamins Subscriptions

You've scored 50% OFF Factor 🤤

Join now and get 50% off a Club membership

Get your first box FREE with Curology!

Claim your $20 bonus with Acorns

Sign up for Headspace Today and get a 14 day free trial!

Get AAA membership for half the price!

Get 30¢/gal cash back on gas at major stations

Get 15% off at Equip Foods

20% Off the at FabFitFun with code INSIDER20

Get 80% off your first order when signing up to be a VIP!

Get 15% off for cleaner skin at CLEARSTEM

Get your first box FREE with Agency!

50% off + Free Shipping at Purple Carrot!

Power Up with Daily Harvest's High-Protein Smoothies

Save $100 with Gobble

Save 10% on your First Maev Order!

15% off your favorite non-alcoholic spirits at The Zero Proof

10% off JLab’s award‑winning audio gear

Get help with or without insurance. Use code SPACE80 for $80 off.

Start speaking a new language in just 3 weeks