Changes and Additions

Dylan Nelson
  • 11 Apr '17

11 Apr, 2017: A new supplementary data catalog "(h) Photometry, Morphology, Strong-lensing and Dynamics (PMSD)" has been added for Illustris-1 (covering 10 snapshots from z=0.1 to z=1.0). It contains many associated measurements primarily from the strong-lensing perspective. (update from Dandan Xu).

Dylan Nelson
  • 2 Jun '17

2 June, 2017: New functionality has been added to the web API. Individual fields can now be downloaded from group catalogs, without needing to download the entire catalog. See the API reference documentation under [base]/groupcat-{num}/?{subset_query}. For example, this link downloads just the Illustris-1 z=0 subhalo SFRs.

Dylan Nelson
  • 21 Aug '17

21 August, 2017: New functionality has been added to the web API. The descendant branch(es) of the SubLink merger tree (i.e. towards lower redshift) can now be obtained for any given halo at any snapshot. See the API reference documentation under [base]/subhalos/{id}/sublink/mdb.hdf5 for details. For example, this link downloads the MDB ("main descendant branch") of the central subhalo of the 10th most massive halo of Illustris-1 at z=2. Because this subhalo lies on the MPB of its z=0 descendant, the return is a single tree branch. Note that if the selected subhalo does not lie on the MPB of its z=0 descendant, then the return is the full descendant merger tree which contains as its first entry the z=0 descendant of this subhalo.

Dylan Nelson
  • 17 Oct '17

17 October, 2017: A new supplementary data catalog "(j) Mock Deep Field Lightcones (HST, JWST, WFIRST)" has been added for Illustris-1. It contains synthetic deep survey images, in particular three "mock ultra deep fields", each 2.8 arcminutes across, in common wide filters used by HST, as well as in filters expected to be used widely by observers with JWST and WFIRST. See the data documentation for more information. (update from Greg Snyder).

Dylan Nelson
  • 1
  • 17 Nov '17

16 November, 2017: The units of the Volume field for gas cells were previously given incorrectly as the reciprocal. The correct units are (ckpc/h)^3, and the documentation has been updated.

Dylan Nelson
  • 22 Dec '17

22 December, 2017: The units of the angular momentum quantities in the supplementary catalog "(i) Halo/galaxy angular momentum and baryon content" have been fixed, they previously included only one factor of little h, but the correct value is h^2.

Dylan Nelson
  • 2 Feb

2 February, 2018: New functionality has been added to the web API. A "simple.json" return is available for the SubLink tree, which gives information about the main progenitor branch of a subhalo, and a list of its past mergers, only. In both cases a pair of (snapshot number, subhalo ID) are given. For example, this link shows a history with three merger events. See the API reference documentation under [base]/subhalos/{id}/sublink/ for details. (thanks to Zephyr Penoyre).