Axions comprise a broad class of particles that can play a major role in explaining the
unknown aspects of cosmology. They are also well-motivated within high energy physics …

Lynx, one of the four strategic mission concepts under study for the 2020 Astrophysics
Decadal Survey, provides leaps in capability over previous and planned x-ray missions and …

Self-gravitating bosonic fields can support stable and localized (solitonic) field
configurations. Such solitons should be ubiquitous in models of axion dark matter, with their …

Observations of the redshifted 21-cm line of atomic hydrogen have provided several upper
limits on the 21-cm power spectrum and a tentative detection of the sky-averaged signal at …

For the past 400 years, astronomers have sought to observe and interpret the Universe by
building more powerful telescopes. These incredible instruments extend the capabilities of …

Intergalactic space is filled with a pervasive medium of ionized gas, the intergalactic medium
(IGM). A residual neutral fraction is detected in the spectra of quasistellar objects at both low …

ABSTRACT We describe the Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3)
Early Release Science (ERS) observations in the Great Observatories Origins Deep Survey …

If the dark matter (DM) were composed of axions, then structure formation in the Universe
would be suppressed below the axion Jeans scale. Using an analytic model for the halo …

The discovery of luminous quasars at redshift z~ 6 indicates the presence of supermassive
black holes (SMBHs) of mass~ 10 9 M☉ when the universe was less than 1 billion years old …

A concept for a new space-based cosmology mission called the Dark Ages Radio Explorer
(DARE) is presented in this paper. DARE's science objectives include:(1) When did the first …