WFRF:(Font Ribera Andreu)
Sökning: WFRF:(Font Ribera Andreu) > Cosmological Hydrod...
LIBRIS Formathandbok (Information om MARC21)
| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 02832naa a2200385 4500 | |
| 001 | oai:DiVA.org:su-166769 | |
| 003 | SwePub | |
| 008 | 190313s2019 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1667692 URI |
| 024 | 7 | a https://doi.org/10.3847/1538-4357/aaf5762 DOI |
| 040 | a (SwePub)su | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Anderson, Lauren4 aut |
| 245 | 1 0 | a Cosmological Hydrodynamic Simulations with Suppressed Variance in the Ly alpha Forest Power Spectrum |
| 264 | c 2019-01-28 | |
| 264 | 1 | b American Astronomical Society,c 2019 |
| 338 | a print2 rdacarrier | |
| 520 | a We test a method to reduce unwanted sample variance when predicting Ly alpha forest power spectra from cosmological hydrodynamical simulations. Sample variance arises due to sparse sampling of modes on large scales and propagates to small scales through nonlinear gravitational evolution. To tackle this, we generate initial conditions in which the density perturbation amplitudes are fixed to the ensemble average power spectrum-and are generated in pairs with exactly opposite phases. We run 50 such simulations (25 pairs) and compare their performance against 50 standard simulations by measuring the Ly alpha 1D and 3D power spectra at redshifts z = 2, 3, and 4. Both ensembles use periodic boxes of 40 h(-1)Mpc containing 512(3) particles each of dark matter and gas. As a typical example of improvement, for wavenumbers k = 0.25 hMpc(-1) at z = 3, we find estimates of the 1D and 3D power spectra converge 34 and 12 times faster in a paired-fixed ensemble compared with a standard ensemble. We conclude that, by reducing the computational time required to achieve fixed accuracy on predicted power spectra, the method frees up resources for exploration of varying thermal and cosmological parameters-ultimately allowing the improved precision and accuracy of statistical inference. | |
| 650 | 7 | a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng |
| 653 | a early universe | |
| 653 | a intergalactic medium | |
| 653 | a methods: numerical | |
| 700 | 1 | a Pontzen, Andrew4 aut |
| 700 | 1 | a Font-Ribera, Andreu4 aut |
| 700 | 1 | a Villaescusa-Navarro, Francisco4 aut |
| 700 | 1 | a Rogers, Keir K.u Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)kroge |
| 700 | 1 | a Genel, Shy4 aut |
| 710 | 2 | a Stockholms universitetb Fysikum4 org |
| 773 | 0 | t Astrophysical Journald : American Astronomical Societyg 871:2q 871:2x 0004-637Xx 1538-4357 |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-166769 |
| 856 | 4 8 | u https://doi.org/10.3847/1538-4357/aaf576 |
Hitta mer i SwePub
- Av författaren/redakt...
- Anderson, Lauren
- Pontzen, Andrew
- Font-Ribera, And ...
- Villaescusa-Nava ...
- Rogers, Keir K.
- Genel, Shy
- Om ämnet
-
- NATURVETENSKAP
- NATURVETENSKAP
- och Fysik
- Artiklar i publikationen
- Astrophysical Jo ...
- Av lärosätet
- Stockholms universitet
Sök utanför SwePub
- Sök vidare i:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - Nationella bibliotekssystem
- LIBRIS.kb.se
