In the quest to obtain precise measurements of the Hubble Constant, Type Ia supernoave have been consistently used as optical standard candles. What if near-infrared observations of SNe joined the race?
We understand cosmology by building models that we can trace back through time, but nothing about these models limits them to the past. As the universe expands, faster and faster pushed by dark energy, when does that acceleration outstrip gravity? And when do the last stars form?
Today’s paper discusses how the recent gravitational wave announcement relates to cosmology.
I wanted to call this post “Hubble Trouble,” but six hundred people have already done that.
Today’s paper constrains cosmological parameters from one of the largest ground-based astrophysical surveys ever undertaken – DES. An insight into their first-year’s data analysis, released in August 2017.
The accuracy of our estimates of the radii of white dwarf stars has important implications to cosmology. We currently rely on a theoretical mass-radius relationship for that. Are we doing a good job?
Image credits: RJHall/Wikimedia Commons.