Measurement of the small-scale structure of the intergalactic medium using close quasar pairs-Reference-Cited by-同舟云学术

Measurement of the small-scale structure of the intergalactic medium using close quasar pairs

Published:2017-04-28 Issue:6336 Volume:356 Page:418-422
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Rorai Alberto¹²^ORCID,Hennawi Joseph F.²³,Oñorbe Jose²^ORCID,White Martin⁴⁵^ORCID,Prochaska J. Xavier⁶^ORCID,Kulkarni Girish¹²^ORCID,Walther Michael²^ORCID,Lukić Zarija⁵,Lee Khee-Gan⁵^ORCID

Affiliation:

1. Institute of Astronomy, Cambridge, UK.

2. Max-Planck-Institut für Astronomie, Königstuhl, Germany.

3. Department of Physics, University of California, Santa Barbara, CA, USA.

4. Department of Astronomy, University of California, Berkeley, CA, USA.

5. Lawrence Berkeley National Laboratory, Berkeley, CA, USA.

6. University of California Observatories–Lick Observatory, University of California, Santa Cruz, CA, USA.

Abstract

Using quasar pairs to measure smoothness Space between galaxies is filled with a tenuous gas known as the intergalactic medium (IGM). The presence of hydrogen atoms in the IGM at different redshifts imprints a series of absorption lines in the spectra of background quasars. Rorai et al. studied pairs of closely spaced quasars and quantified how similar their absorption lines are as a function of transverse separation and redshift. They thus assessed the smoothness of the IGM on relatively small scales—several times the size of a galaxy. The results constrain interactions between galaxies and the IGM, such as heating by ultraviolet photons. Science , this issue p. 418

Funder

Alexander von Humboldt Foundation

Max Planck Society

NSF

U.S. Department of Energy

European Research Council

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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