https://astrowiki.surrey.ac.uk/ 2026-04-25T18:00:05+00:00 https://astrowiki.surrey.ac.uk/ https://astrowiki.surrey.ac.uk/lib/tpl/dokuwiki/images/favicon.ico text/html 2022-10-24T12:26:59+00:00 Anonymous (anonymous@undisclosed.example.com) https://astrowiki.surrey.ac.uk/doku.php?id=tests:streams:challenges&rev=1666614419&do=diff Challenges Content * * * * * * * * * 1. Spherical Halo Update 30 October 2014: fixed coordinate transformation to observables. Now consistent with, and uses same parameters as, Kester Smith's Java applet. If you downloaded earlier than Oct 30, re-download text/html 2022-10-24T12:26:59+00:00 Anonymous (anonymous@undisclosed.example.com) https://astrowiki.surrey.ac.uk/doku.php?id=tests:streams:methods&rev=1666614419&do=diff Methods Jason Sanders - Angle-Frequency Approach Construct a model for a single stream by using information about the form of the stream in angle-frequency space in the true potential. The model favours two narrow clumps in frequency space aligned with the angle structure. text/html 2022-10-24T12:26:59+00:00 Anonymous (anonymous@undisclosed.example.com) https://astrowiki.surrey.ac.uk/doku.php?id=tests:streams:participants&rev=1666614419&do=diff Participants Andreea Font (coordinator) <A.S.Font@ljmu.ac.uk> Robyn Sanderson (coordinator) <robyn@astro.columbia.edu> Adrian Price-Whelan <adrn@astro.columbia.edu> Ana Bonaca <ana.bonaca@yale.edu> Andreas Küpper (coordinator) <ahwkuepper@gmail.com> Jorge Peñarrubia <jorpega@ast.cam.ac.uk> Nathan Deg <ndeg@astro.queensu.ca> Raphael Errani <raer@roe.ac.uk> Hans Buist <buist@astro.rug.nl> Jason Sanders <jls@ast.cam.ac.uk> Daniele Fantin <daniele.fanta21@gmail.com> Rachel Kennedy text/html 2022-10-24T12:26:59+00:00 Anonymous (anonymous@undisclosed.example.com) https://astrowiki.surrey.ac.uk/doku.php?id=tests:streams:results&rev=1666614419&do=diff Results Content * * * * * * * * * * * 1. Gaia Challenge 2014-2015 Finding streams in the halo Paola Re Fiorentin & Alessandro Spagna We selected all the stream stellar particles within 3 kpc of the Sun from Robyn Sanderson's data set and applied the random errors expected for FGK dwarfs as estimated by