Can we a-void the Hubble tension with local voids?
Cosmologists revisit an idea for addressing the Hubble tension: that a local void is messing with our measurements along the cosmic distance ladder.
Satellites of satellites should exist. Let’s go look for them.
Today’s paper makes predictions for the yet-to-be-observed dwarf galaxy population around Andromeda’s satellite galaxy, M33. It provides scientific justification for a future mission with WFIRST.
Astrobites at AAS 233: Day 3
We report on Day 3 of the winter AAS meeting in Seattle, WA. Highlights include updates in X-ray astronomy, the discovery of a second repeating FRB, an exploration of astrochemistry in planet-forming disks, and a look at the 2020 Astronomy Decadal Survey.
Can the CMB Alone Provide Evidence for Dark Energy?
Using the WMAP power spectrum together with weak lensing data from the Atacama Cosmology Telescope, the authors of this paper show that a cosmological model including a dark energy component is required to fit the Cosmic Microwave Background data.