Overview/ASTRID Simulation/Snapshots (Data Downloads)
| Parameter Description | Value |
|---|---|
| Simulation name | ASTRID |
| Alternative simulation name | astrid |
| Side length of simulation box [ckpc/h] | 250 |
| Dark matter particle mass [10^10 msun/h] | 6.74x10^6 |
| Gas matter particle mass [10^10 msun/h] | 1.27x10^6 |
| Number of dark matter particles | 166375000000 |
| Number of gas particles | 166375000000 |
| Start redshift | z=99 |
| End redshift | z=0.5 |
| Cosmology | Planck15 |
| Total matter density (Omega0) | 0.3089 |
| Dark energy density (OmegaLambda) | 0.6911 |
| Baryonic matter density (OmegaBaryon) | 0.0486 |
| HubbleParam (h) | 0.6774 |
| Implemented Physics Models | |
| Gas cooling | Radiative cooling (primordial + metal line) |
| Star formation | Multi-phase SF model (SH03) + molecular based SF (Okamoto2010) |
| Stellar feedback | Type-II SN wind feedback |
| BH Formation | halo-based BH seeding, power-law distribution of the seed mass |
| BH Accretion | Eddington-limited Bondi accretion |
| AGN Feedback | thermal+kinetic feedback |
| BH Dynamics | sub-grid dynamical friction from stars |
The Astrid simulation is described in the presentation papers: Bird+2022; Ni+2022; Ni+2024. Please cite these papers if you are using the Astrid snapshot from this portal for your research. A web-based data query API is still under development. We are also working on releasing more post-processed data product such as the MBH histories, mergers and dual AGN catalogs. Stay tuned!
| Snapshot | Age (Gyr) | Redshift (z) | DM in group [#] | Gas in group [#] | Stars [#] | BHs [#] | FoF Groups [#] | FoF Groups Catalog | Particles in Group Catalog | Sub Groups Catalog |
|---|---|---|---|---|---|---|---|---|---|---|
| 13 | 0.37 | 12.0 | 664611636 | 597744084 | 876465 | 11487 | 16181584 | Browse (3.8G) | Browse (88.81M) | Browse (0B) |
| 15 | 0.41 | 11.15 | 1177834948 | 1067985918 | 2034300 | 27696 | 26922896 | Browse (6.32G) | Browse (200.32M) | Browse (0B) |
| 17 | 0.47 | 10.0 | 2388714490 | 2190132171 | 6139119 | 87988 | 49644646 | Browse (11.66G) | Browse (354.18G) | Browse (0B) |
| 18 | 0.51 | 9.52 | 3145765455 | 2897925091 | 9949347 | 165155 | 62545078 | Browse (14.68G) | Browse (966.2M) | Browse (0B) |
| 20 | 0.55 | 9.0 | 4178610148 | 3866817378 | 16853594 | 272885 | 78934733 | Browse (18.53G) | Browse (624.15G) | Browse (0B) |
| 21 | 0.57 | 8.74 | 4791212834 | 4443648534 | 21496951 | 272866 | 88085479 | Browse (20.68G) | Browse (2.03G) | Browse (0B) |
| 22 | 0.61 | 8.3 | 5988660226 | 5573172391 | 32434216 | 447875 | 104901923 | Browse (24.62G) | Browse (3.06G) | Browse (0B) |
| 23 | 0.64 | 8.0 | 6940068859 | 6474733501 | 43870934 | 556906 | 117362497 | Browse (33.67G) | Browse (1.07T) | Browse (7.05G) |
| 25 | 0.66 | 7.85 | 7447862783 | 6955711610 | 50592223 | 692045 | 123699683 | Browse (29.04G) | Browse (4.77G) | Browse (0B) |
| 27 | 0.69 | 7.58 | 8456788642 | 7903761625 | 66026908 | 850361 | 135545179 | Browse (31.82G) | Browse (6.22G) | Browse (0B) |
| 29 | 0.73 | 7.22 | 9908458156 | 9229939765 | 93652726 | 1029787 | 150427427 | Browse (35.31G) | Browse (8.8G) | Browse (0B) |
| 31 | 0.77 | 7.0 | 10895217587 | 10093512100 | 115699385 | 1128661 | 158811704 | Browse (45.56G) | Browse (1.67T) | Browse (11.15G) |
| 33 | 0.79 | 6.83 | 11690434831 | 10761622719 | 138281364 | 1316687 | 164409464 | Browse (38.59G) | Browse (12.98G) | Browse (0B) |
| 35 | 0.8 | 6.73 | 12130783144 | 11120418667 | 150813601 | 1539365 | 167065270 | Browse (39.21G) | Browse (14.16G) | Browse (0B) |
| 36 | 0.82 | 6.64 | 12586151934 | 11483149238 | 166345691 | 1538921 | 169494379 | Browse (39.78G) | Browse (15.61G) | Browse (0B) |
| 39 | 0.84 | 6.5 | 13274167868 | 12017026512 | 194219665 | 1784123 | 172596183 | Browse (40.51G) | Browse (18.23G) | Browse (0B) |
| 41 | 0.86 | 6.37 | 13911932520 | 12497714517 | 219754271 | 1783251 | 174913670 | Browse (41.05G) | Browse (20.6G) | Browse (0B) |
| 43 | 0.89 | 6.25 | 14555350755 | 12967460634 | 248344642 | 2068658 | 176801462 | Browse (41.5G) | Browse (23.29G) | Browse (0B) |
| 47 | 0.93 | 6.0 | 15907067489 | 13928382993 | 317420191 | 2398274 | 179648902 | Browse (51.54G) | Browse (2.38T) | Browse (15.64G) |
| 49 | 0.96 | 5.89 | 16529931521 | 14368751849 | 354146583 | 2396720 | 180608141 | Browse (42.39G) | Browse (33.17G) | Browse (0B) |
| 51 | 0.98 | 5.8 | 17024045447 | 14718566750 | 387262689 | 2696172 | 181267916 | Browse (42.55G) | Browse (36.27G) | Browse (0B) |
| 55 | 1.0 | 5.69 | 17719272036 | 15209530299 | 443141795 | 2864478 | 182092851 | Browse (42.74G) | Browse (41.49G) | Browse (0B) |
| 58 | 1.02 | 5.6 | 18244392019 | 15576348958 | 483339701 | 3033243 | 182677522 | Browse (42.88G) | Browse (45.24G) | Browse (0B) |
| 62 | 1.04 | 5.5 | 18872471546 | 16004013348 | 530818740 | 3180715 | 183346928 | Browse (43.03G) | Browse (49.68G) | Browse (0B) |
| 66 | 1.07 | 5.41 | 19469652064 | 16412933984 | 578881620 | 3390244 | 183961244 | Browse (43.18G) | Browse (54.17G) | Browse (0B) |
| 73 | 1.1 | 5.29 | 20250951580 | 16968962450 | 650696500 | 3687067 | 184735491 | Browse (43.36G) | Browse (60.88G) | Browse (0B) |
| 84 | 1.12 | 5.2 | 20883212852 | 17433989051 | 728587106 | 3921238 | 185352156 | Browse (43.5G) | Browse (68.15G) | Browse (0B) |
| 107 | 1.18 | 5.0 | 22269715182 | 18467914542 | 884192492 | 4235097 | 186708114 | Browse (53.56G) | Browse (2.33T) | Browse (19.89G) |
| 113 | 1.2 | 4.91 | 22954809362 | 18994270776 | 988365084 | 4410739 | 187362520 | Browse (43.98G) | Browse (92.38G) | Browse (0B) |
| 122 | 1.27 | 4.7 | 24525751408 | 20206504888 | 1242426577 | 4792781 | 188859130 | Browse (44.33G) | Browse (116.07G) | Browse (0B) |
| 125 | 1.3 | 4.61 | 25280256511 | 20771470465 | 1366296561 | 4785150 | 189569559 | Browse (44.49G) | Browse (127.61G) | Browse (0B) |
| 126 | 1.32 | 4.56 | 25668263779 | 21052623131 | 1426302016 | 5188687 | 189941431 | Browse (44.58G) | Browse (133.23G) | Browse (0B) |
| 128 | 1.34 | 4.5 | 26169681275 | 21412157736 | 1518041621 | 5380011 | 190384060 | Browse (44.69G) | Browse (141.78G) | Browse (0B) |
| 130 | 1.36 | 4.45 | 26571086674 | 21700891886 | 1589413381 | 5375403 | 190717372 | Browse (44.76G) | Browse (148.43G) | Browse (0B) |
| 131 | 1.37 | 4.41 | 26906249882 | 21944983093 | 1650381994 | 5371165 | 190993921 | Browse (44.83G) | Browse (154.11G) | Browse (0B) |
| 133 | 1.4 | 4.33 | 27612135676 | 22465908093 | 1779407472 | 5646059 | 191498397 | Browse (44.95G) | Browse (166.15G) | Browse (0B) |
| 134 | 1.42 | 4.29 | 28010175295 | 22764236807 | 1862792719 | 5640697 | 191763039 | Browse (45.01G) | Browse (173.91G) | Browse (0B) |
| 136 | 1.44 | 4.25 | 28320244597 | 22999025385 | 1935216514 | 5944831 | 191954213 | Browse (45.05G) | Browse (180.68G) | Browse (0B) |
| 137 | 1.45 | 4.22 | 28603469726 | 23217086118 | 1997917545 | 5941022 | 192120419 | Browse (45.09G) | Browse (186.52G) | Browse (0B) |
| 139 | 1.47 | 4.16 | 29099908021 | 23604601486 | 2115711766 | 5932978 | 192394342 | Browse (45.16G) | Browse (197.49G) | Browse (0B) |
| 142 | 1.5 | 4.11 | 29618000918 | 24005863028 | 2225737472 | 6369150 | 192662369 | Browse (45.22G) | Browse (207.77G) | Browse (0B) |
| 144 | 1.52 | 4.06 | 30069314089 | 24350630858 | 2340322928 | 6361398 | 192891639 | Browse (45.27G) | Browse (218.44G) | Browse (0B) |
| 147 | 1.55 | 4.0 | 30596836664 | 24750037125 | 2484897972 | 6606407 | 193154391 | Browse (55.41G) | Browse (3.27T) | Browse (22.93G) |
| 149 | 1.57 | 3.95 | 31048246452 | 25096738124 | 2608208213 | 6598008 | 193341839 | Browse (45.38G) | Browse (243.4G) | Browse (0B) |
| 151 | 1.59 | 3.9 | 31545143214 | 25481677277 | 2739833326 | 6878270 | 193532625 | Browse (45.42G) | Browse (255.68G) | Browse (0B) |
| 153 | 1.62 | 3.84 | 32087345171 | 25897808395 | 2894615916 | 6866902 | 193733742 | Browse (45.47G) | Browse (270.1G) | Browse (0B) |
| 155 | 1.64 | 3.81 | 32440162309 | 26164307658 | 2994549088 | 7129561 | 193847098 | Browse (45.5G) | Browse (279.42G) | Browse (0B) |
| 158 | 1.67 | 3.75 | 33011415937 | 26595914322 | 3162821561 | 7289540 | 194015010 | Browse (45.54G) | Browse (295.11G) | Browse (0B) |
| 161 | 1.69 | 3.7 | 33511400872 | 26979396515 | 3334722804 | 7277791 | 194125063 | Browse (45.56G) | Browse (311.12G) | Browse (0B) |
| 163 | 1.72 | 3.66 | 33936512207 | 27309244510 | 3462933141 | 7554458 | 194208146 | Browse (45.58G) | Browse (323.08G) | Browse (0B) |
| 166 | 1.75 | 3.6 | 34562448943 | 27795874838 | 3667406848 | 7663834 | 194291750 | Browse (45.6G) | Browse (342.13G) | Browse (0B) |
| 170 | 1.78 | 3.54 | 35140759429 | 28244168939 | 3876891215 | 7868058 | 194338631 | Browse (45.61G) | Browse (361.65G) | Browse (0B) |
| 174 | 1.81 | 3.5 | 35566377576 | 28578841218 | 4042263552 | 7855964 | 194338112 | Browse (45.61G) | Browse (377.05G) | Browse (0B) |
| 177 | 1.83 | 3.46 | 36030583955 | 28947657161 | 4217786008 | 8027208 | 194338588 | Browse (45.61G) | Browse (393.41G) | Browse (0B) |
| 181 | 1.87 | 3.4 | 36679132364 | 29459651404 | 4456691053 | 8236545 | 194322014 | Browse (45.61G) | Browse (415.68G) | Browse (0B) |
| 184 | 1.9 | 3.35 | 37133177719 | 29809981778 | 4634227350 | 8222326 | 194310664 | Browse (45.61G) | Browse (432.21G) | Browse (0B) |
| 187 | 1.94 | 3.3 | 37735683444 | 30265646329 | 4869072541 | 8394910 | 194266866 | Browse (45.6G) | Browse (454.1G) | Browse (0B) |
| 190 | 1.97 | 3.25 | 38267926470 | 30668235620 | 5094884276 | 8563646 | 194205758 | Browse (45.58G) | Browse (475.14G) | Browse (0B) |
| 194 | 2.0 | 3.2 | 38826414454 | 31100413010 | 5371317232 | 8721423 | 194089322 | Browse (45.56G) | Browse (500.9G) | Browse (0B) |
| 198 | 2.04 | 3.15 | 39403446356 | 31555235202 | 5625314396 | 8887755 | 193953462 | Browse (45.52G) | Browse (524.56G) | Browse (0B) |
| 202 | 2.08 | 3.1 | 39957992627 | 31988292192 | 5873091295 | 8981139 | 193815887 | Browse (45.49G) | Browse (547.65G) | Browse (0B) |
| 207 | 2.12 | 3.05 | 40552050803 | 32443562612 | 6151748477 | 9099075 | 193677394 | Browse (45.46G) | Browse (573.61G) | Browse (0B) |
| 214 | 2.15 | 3.0 | 41120051240 | 32880836099 | 6468549017 | 9294670 | 193500739 | Browse (45.42G) | Browse (6.0T) | Browse (0B) |
| 261 | 2.51 | 2.6 | 46012320021 | 36470545392 | 9432656952 | 10266148 | 191264145 | Browse (55.58G) | Browse (994.01G) | Browse (23.92G) |
| 280 | 2.73 | 2.4 | 48612992488 | 38337578289 | 11181996020 | 10803629 | 189624409 | Browse (55.1G) | Browse (1.15T) | Browse (23.59G) |
| 311 | 2.99 | 2.2 | 51314973346 | 40133341391 | 13109245092 | 11230356 | 187880501 | Browse (54.6G) | Browse (1.35T) | Browse (23.46G) |
| 348 | 3.28 | 2.0 | 54133256382 | 41973971721 | 15556127762 | 11605500 | 186046367 | Browse (54.06G) | Browse (8.93T) | Browse (23.03G) |
| 385 | 3.63 | 1.8 | 57060469815 | 44160665704 | 17853596029 | 11968499 | 183551719 | Browse (53.34G) | Browse (6.86T) | Browse (22.46G) |
| 440 | 4.28 | 1.5 | 61727108637 | 47319751304 | 22404829276 | 12245899 | 180121433 | Browse (52.34G) | Browse (10.83T) | Browse (21.95G) |
| 461 | 4.54 | 1.4 | 63358604345 | 48425444940 | 24077352957 | 12300094 | 178735497 | Browse (51.94G) | Browse (7.98T) | Browse (21.64G) |
| 505 | 5.13 | 1.2 | 66741902616 | 50803163905 | 27891634628 | 12416961 | 175966213 | Browse (51.14G) | Browse (8.64T) | Browse (21.23G) |
| 544 | 5.86 | 1.0 | 70345841891 | 53326739352 | 32526938850 | 12445084 | 173365484 | Browse (50.38G) | Browse (12.99T) | Browse (20.77G) |
| 567 | 6.29 | 0.9 | 72240668626 | 54614276787 | 35005759922 | 12439219 | 171938917 | Browse (49.97G) | Browse (9.86T) | Browse (20.68G) |
| 590 | 6.77 | 0.8 | 74166356952 | 55967756697 | 37662188875 | 12396814 | 170359204 | Browse (49.51G) | Browse (10.29T) | Browse (20.25G) |
| 609 | 7.31 | 0.7 | 76161131282 | 57346996346 | 40592753515 | 12365901 | 168677613 | Browse (49.02G) | Browse (10.75T) | Browse (20.05G) |
| 634 | 7.92 | 0.6 | 78257888795 | 58711893668 | 43848153522 | 12330548 | 167055221 | Browse (48.55G) | Browse (11.24T) | Browse (19.85G) |
| 658 | 8.6 | 0.5 | 80420938462 | 60083502697 | 47319886494 | 12282757 | 165439469 | Browse (48.08G) | Browse (11.7T) | Browse (19.36G) |
| 660 | 8.63 | 0.5 | 80491834304 | 60127608909 | 47396099830 | 12288612 | 165402926 | Browse (48.07G) | Browse (15.57T) | Browse (19.35G) |
| 692 | 9.38 | 0.4 | 82651611518 | 61398576508 | 51104133524 | 12230844 | 163857041 | Browse (47.62G) | Browse (13.11T) | Browse (19.14G) |
| 724 | 10.27 | 0.3 | 84936512084 | 62666505667 | 55329029829 | 12191952 | 162193792 | Browse (54.38G) | Browse (7.66T) | Browse (18.19G) |
| 743 | 11.29 | 0.2 | 87305059020 | 63697751746 | 59728055907 | 12130669 | 160683536 | Browse (46.69G) | Browse (14.34T) | Browse (18.66G) |
| 771 | 12.45 | 0.1 | 89778798566 | 64701735711 | 64219305883 | 12080413 | 159127706 | Browse (46.24G) | Browse (14.95T) | Browse (18.15G) |
| 817 | 13.8 | 0.0 | 92397755716 | 65889360104 | 69007912666 | 12027559 | 157097137 | Browse (52.68G) | Browse (20.67T) | Browse (17.86G) |