Colloq Abstract -Melia

May 5

11am Mountain

Fulvio Melia (UA)

A Non-inflationary Signature in CMB Anisotropies

Abstract

The standard model of cosmology has been quite successful accounting for a broad range of data---at least until the past few years. But as the quality of cosmological measurements has continued to improve, tension has  grown between observations and the predictions of LCDM. In this talk, we will address several "problem" areas, and then focus on the most recent: the emergence of a rather strong non-inflationary signature in the angular correlation function of the microwave background. Inflation is critical to the internal self-consistency of the standard model. Yet after 4 decades, we still lack convincing evidence that it ever happened.

 

 

Connect with NRAO

The National Radio Astronomy Observatory and Green Bank Observatory are facilities of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc.

Founded in 1956, the NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Observing time on NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media.

The National Science Foundation (NSF) is an independent federal agency created by Congress in 1950 "to promote the progress of science; to advance the national health, prosperity, and welfare; to secure the national defense..."

AUI collaborates with the scientific community and research sponsors to plan, build, and operate cutting-edge facilities. We cultivate excellence, deliver value, enhance education, and engage the public.