Please note that eDoc will be permanently shut down in the first quarter of 2021!      Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 742471.0, MPI für Astronomie / Publikationen_mpia
Measurement of the small-scale structure of the intergalactic medium using close quasar pairs
Authors:Rorai, A.; Hennawi, J. F.; Oñorbe, J.; White, M.; Prochaska, J. X.; Kulkarni, G.; Walther, M.; Lukić, Z.; Lee, K.-G.
Date of Publication (YYYY-MM-DD):2017
Title of Journal:Science
Volume:356
Issue / Number:6336
Start Page:418
End Page:422
Audience:Not Specified
Abstract / Description:The distribution of diffuse gas in the intergalactic medium (IGM) imprints a series of hydrogen absorption lines on the spectra of distant background quasars known as the Lyman-α forest. Cosmological hydrodynamical simulations predict that IGM density fluctuations are suppressed below a characteristic scale where thermal pressure balances gravity. We measured this pressure-smoothing scale by quantifying absorption correlations in a sample of close quasar pairs. We compared our measurements to hydrodynamical simulations, where pressure smoothing is determined by the integrated thermal history of the IGM. Our findings are consistent with standard models for photoionization heating by the ultraviolet radiation backgrounds that reionized the universe.
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0036-8075
URL:http://adsabs.harvard.edu/abs/2017Sci...356..418R
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.