Hubble Constant Measurements from Type 1a Supernovae from the Dark Energy Survey

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The Dark Energy Survey looked at 5000 square degrees of the southern skies in an attempt to characterize dark energy but the observations taken are also very useful for supernovae research. By measuring the standard candles known as Type 1a Supernovae, astronomers can measure the expansion rate of the universe, something that has proven problematic as our observations and equipment have improved.

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Can we update the black hole/neutron star sucking up its binary partner animations? Doesn't the partner star radiate/blow off material in all directions? The compact binary orbits through this "atmosphere" and pulls material into an accretion disk and into itself. The usual animation of the compact companion pulling a stream of stuff directly off of the partner is overly dramatic (unless we're close enough to form Roche lobes).

It's gravity, not suction.

Or am I totally off base here?

johnjogerst
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The Hubble Constant is misnamed since it isn't constant.

It can be plotted on an exponential curve.

docholiday