Changes and Additions

Dylan Nelson
  • 35
  • 20 Apr '15

This post will always contain a complete and up-to-date change log. You can enable Notifications on this topic to automatically receive an email for any update.

Chronological change log:

  • 1 June, 2015: Updated the Stellar Circularities, Angular Momenta, Axis Ratios supplementary catalog to include most snapshots of Illustris-1 (13 through 135 for circularities and momenta, 38 through 135 for axis ratios). In addition, a minor bug was fixed which would have previously affected the z=0 values for only a small percentage of subhalos. (update from Shy Genel)
  • 12 November, 2015: Added additional data to the Stellar Mocks: Multi-band Images and SEDs supplementary dataset, for additional redshifts/snapshots of Illustris-1. In particular, z = 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0 (twelve additional redshifts in addition to the data which remains the same for z=0). For each of these redshifts, both rest-frame and redshifted FITS files are available. The corresponding documentation is updated, as is the 'stellar mocks' section of the API reference. (update from Paul Torrey)
  • 11 December, 2015: The units of the Potential field for all four particle types were previously given incorrectly, having omitted a scale factor. The correct units are (km/s)^2/a, and the documentation has been updated. (Note also: Potential not available in DM-only runs).
  • 21 December, 2015: The Stellar Circularities, Angular Momenta, Axis Ratios catalog for Illustris-1 has been updated due to the previous Potential units change. The following fields were incorrect (at z>0 only) and are now fixed: CircAbove07Frac, CircAbove07MinusBelowNeg07Frac, CircTwiceBelow0Frac, and their _allstars versions.
  • 16 March, 2016: A "Subhalo Matching To Dark" catalog for Illustris-1, Illustris-2 and Illustris-3 has been released. This gives, for each subhalo in the full physics box, the matching subhalo in the DM-only run, at the same resolution. See the documentation for more details.
  • 17 March, 2016: The descriptions of the BH_Pressure and BH_U fields (for blackhole particle-level data) in the documentation have been revised for clarity.
  • 18 April, 2016: A new supplementary data catalog "(e) Multi-Redshift Non-Parametric Stellar Morphologies" has been added for Illustris-1, extending the previous "non-parametric morphologies" data which had been available only for z=0. (update from Greg Snyder).
  • 20 May, 2016: The description of the LastStarTime field for tracer particles in the documentation has been revised for clarity.
  • 22 July, 2016: A new set of Stellar Mocks FITS: SEDs (z=0 only) are available, restricted to subhalo stars only. This is in contrast to the previously available "broadband.fits" files which contained all stars in the parent halo within the imaging region. Therefore, all stars not gravitationally bound to the galaxy of interest are excluded in this new data, including any other nearby galaxies. These contain only integrated SEDs, and not broadband images. These are available for subhalos with greater than 500 star particles. (update from Paul Torrey).
  • 21 September, 2016: A new supplementary data catalog "(f) Blackhole Mergers and Details" has been added for all FP runs (Illustris-1, -2 and -3). This includes information on all SMBH mergers and properties at high time resolution, information which was not previously available in any form. See the new data documentation for details. (update from Luke Kelley).
  • 20 Oct, 2016: A new supplementary data catalog "(g) Stellar Assembly" has been added for all FP runs (Illustris-1, -2 and -3). This includes details on the stellar assembly process of all galaxies across all snapshots, focusing on in situ vs. ex situ stellar mass growth, the contribution from star formation before or after infall, the role of major and/or minor mergers and flyby encounters. See the new data documentation for details. (update from Vicente Rodriguez-Gomez).
  • 25 Nov, 2016: A new supplementary data catalog "(i) Halo/galaxy angular momentum and baryon content" has been added for Illustris-1 and Illustris-1-Dark (z=0 snapshot). It includes details on the angular momentum contents, energies, and rotation of the different baryonic components, measured for every halo and galaxy. (update from Jolanta Zjupa).
  • 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).
  • 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.
  • 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.
  • 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).
  • 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.
  • 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.
  • 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).
  • 17 December, 2018: The public data release of the first two simulations of IllustrisTNG: these are the TNG100 and TNG300 volumes (see paper on arxiv).
  • 25 February, 2019: A new TNG supplementary data catalog "(h) Subbox Subhalo List" has been added for all TNG baryonic simulations with subboxes. It contains information on which subhalos/galaxies/halos pass through each subbox over time, allowing high time-resolution analyses and visualization. See the data documentation for more information. (update from Dylan Nelson).
  • 1 March, 2019: A new TNG supplementary data catalog "(i) Molecular and atomic hydrogen (HI+H2) galaxy contents" has been added for TNG100-1, TNG100-2, TNG300-1, and Illustris-1. This contains several models of the HI and H2 (molecular hydrogen) mass per subhalo. See the data documentation for more information. (update from Benedikt Diemer).
  • 3 March, 2019: A new TNG supplementary data catalog "(l) SKIRT Synthetic Images and Optical Morphologies" has been added for TNG100-1 (currently z=0 and z=0.05). This contains post-processed dust radiative transfer calculations with SKIRT to derive broadband images, as well as the results of automatic morphological classification measures. See the data documentation for more information. (update from Vicente Rodriguez-Gomez).
  • 19 March, 2019: The (c) Stellar Circularities, Angular Momenta, Axis Ratios supplementary catalog has been produced and released for TNG100 (all three resolution levels). The details and information herein is exactly the same as was previously made available for the original Illustris-1 simulation. (update from Shy Genel).
  • 30 April, 2019: A new (d) Subhalo Matching Between Runs catalog has been released, covering matching between all baryonic runs and their dark matter only counterparts (all TNG100 and TNG300 boxes). This gives, for each subhalo in the full physics box, the matching subhalo in the DM-only run, at the same resolution. See the documentation for more details. (update from Dylan Nelson).
  • 27 May, 2019: The LHaloTree merger tree for the TNG100-1 run (only) has been re-made. If you have been using this tree, or have downloaded it previously, please download it again, as the old version was incorrect. The checksums and offsets have been updated accordingly.
  • 17 Oct, 2019: All parts of the Illustris and TNG websites are now HTTPS (encrypted) by default. Please report any issues.

Future additions:

  • TNG supplementary data catalog: (a) Tracer Tracks
  • TNG supplementary data catalog: (b) Stellar Masses, Star Formation Rates
  • TNG supplementary data catalog: (e) Stellar Projected Sizes
  • TNG supplementary data catalog: (g) Stellar Assembly
  • TNG supplementary data catalog: (j) Halo/galaxy angular momentum and baryon content
  • TNG supplementary data catalog: (k) SDSS Photometry, Colors, and Mock Fiber Spectra
  • TNG supplementary data catalog: (m) DisPerSE Cosmic Web
Dylan Nelson
  • 2 Jun '15

1 June, 2015: Updated the "Stellar Circularities, Angular Momenta, Axis Ratios" supplementary catalog to include most snapshots of Illustris-1 (13 through 135 for circularities and momenta, 38 through 135 for axis ratios). In addition, a minor bug was fixed which would have previously affected the z=0 values for only a small percentage of subhalos. (update from Shy Genel)

Dylan Nelson
  • 12 Nov '15

12 November, 2015: Added additional data to the "Stellar Mocks: Multi-band Images and SEDs" supplementary dataset, for additional redshifts/snapshots of Illustris-1. In particular, z = 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0 (twelve additional redshifts in addition to the data which remains the same for z=0). For each of these redshifts, both rest-frame and redshifted FITS files are available. The corresponding documentation is updated, as is the 'stellar mocks' section of the API reference. (update from Paul Torrey)

Dylan Nelson
  • 1
  • 11 Dec '15

11 December, 2015: The units of the Potential field for all four particle types were previously given incorrectly, having omitted a scale factor. The correct units are (km/s)^2/a, and the documentation has been updated. (Note also: Potential not available in DM-only runs).

Dylan Nelson
  • 21 Dec '15

21 December, 2015: The "Stellar Circularities, Angular Momenta, Axis Ratios" catalog for Illustris-1 has been updated due to the previous Potential units change. The following fields were incorrect (at z>0 only) and are now fixed: CircAbove07Frac, CircAbove07MinusBelowNeg07Frac, CircTwiceBelow0Frac, and their _allstars versions.

Dylan Nelson
  • 1
  • 16 Mar '16

16 March, 2016: A "Subhalo Matching To Dark" catalog for Illustris-1, Illustris-2 and Illustris-3 has been released. This gives, for each subhalo in the full physics box, the matching subhalo in the DM-only run, at the same resolution. See the documentation for more details.

Dylan Nelson
  • 17 Mar '16

17 March, 2016: The descriptions of the BH_Pressure and BH_U fields (for blackhole particle-level data) in the documentation have been revised for clarity.

Dylan Nelson
  • 18 Apr '16

18 April, 2016: A new supplementary data catalog "(e) Multi-Redshift Non-Parametric Stellar Morphologies" has been added for Illustris-1, extending the previous "non-parametric morphologies" data which had been available only for z=0. (update from Greg Snyder).

Dylan Nelson
  • 19 May '16

20 May, 2016: The description of the LastStarTime field for tracer particles in the documentation has been revised for clarity.

Dylan Nelson
  • 22 Jul '16

22 July, 2016: A new set of Stellar Mocks FITS files (z=0 only) are available, restricted to subhalo stars only. This is in contrast to the previously available "broadband.fits" files which contained all stars in the parent halo within the imaging region. Therefore, all stars not gravitationally bound to the galaxy of interest are excluded in this new data, including any other nearby galaxies. These contain only integrated SEDs, and not broadband images. These are available for subhalos with greater than 500 star particles. (update from Paul Torrey).

Dylan Nelson
  • 21 Sep '16

21 September, 2016: A new supplementary data catalog "(f) Blackhole Mergers and Details" has been added for all FP runs (Illustris-1, -2 and -3). This includes information on all SMBH mergers and properties at high time resolution, information which was not previously available in any form. See the new data documentation for details. (update from Luke Kelley).

Dylan Nelson
  • 3
  • 20 Oct '16

20 Oct, 2016: A new supplementary data catalog "(g) Stellar Assembly" has been added for all FP runs (Illustris-1, -2 and -3). This includes details on the stellar assembly process of all galaxies across all snapshots, focusing on in situ vs. ex situ stellar mass growth, the contribution from star formation before or after infall, the role of major and/or minor mergers and flyby encounters. See the new data documentation for details. (update from Vicente Rodriguez-Gomez).

Dylan Nelson
  • 25 Nov '16

25 Nov, 2016: A new supplementary data catalog "(i) Halo/galaxy angular momentum and baryon content" has been added for Illustris-1 and Illustris-1-Dark (z=0 snapshot). It includes details on the angular momentum contents, energies, and rotation of the different baryonic components, measured for every halo and galaxy. (update from Jolanta Zjupa).

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 '18

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).

Dylan Nelson
  • 20 Dec '18

17 December, 2018: The public data release of the first two simulations of IllustrisTNG: these are the TNG100 and TNG300 volumes (see paper on arxiv).

Dylan Nelson
  • 25 Feb

25 February, 2019: A new TNG supplementary data catalog "(h) Subbox Subhalo List" has been added for all TNG baryonic simulations with subboxes. It contains information on which subhalos/galaxies/halos pass through each subbox over time, allowing high time-resolution analyses and visualization. See the data documentation for more information. (update from Dylan Nelson).

Dylan Nelson
  • 1 Mar

1 March, 2019: A new TNG supplementary data catalog "(i) Molecular and atomic hydrogen (HI+H2) galaxy contents" has been added for TNG100-1, TNG100-2, TNG300-1, and Illustris-1. This contains several models of the HI and H2 (molecular hydrogen) mass per subhalo. See the data documentation for more information. (update from Benedikt Diemer).

Dylan Nelson
  • 2 Mar

3 March, 2019: A new TNG supplementary data catalog "(l) SKIRT Synthetic Images and Optical Morphologies" has been added for TNG100-1 (currently z=0 and z=0.05). This contains post-processed dust radiative transfer calculations with SKIRT to derive broadband images, as well as the results of automatic morphological classification measures. See the data documentation for more information. (update from Vicente Rodriguez-Gomez).

Dylan Nelson
  • 19 Mar

19 March, 2019: The Stellar Circularities, Angular Momenta, Axis Ratios supplementary catalog has been produced and released for TNG100 (all three resolution levels). The details and information herein is exactly the same as was previously made available for the original Illustris-1 simulation. (update from Shy Genel).

Dylan Nelson
  • 30 Apr

30 April, 2019: A first part of the (d) Subhalo Matching Between Runs catalog has been released, covering matching between all baryonic runs and their dark matter only counterparts (all TNG100 and TNG300 boxes). This gives, for each subhalo in the full physics box, the matching subhalo in the DM-only run, at the same resolution. See the documentation for more details. (update from Dylan Nelson).

Dylan Nelson
  • 17 May

27 May, 2019: The LHaloTree merger tree for the TNG100-1 run (only) has been re-made. If you have been using this tree, or have downloaded it previously, please download it again, as the old version was incorrect. The checksums and offsets have been updated accordingly.

Dylan Nelson
  • 18 Oct

17 Oct, 2019: All parts of the Illustris and TNG websites are now HTTPS (encrypted) by default. Please report any issues.

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