question archive Why is it important that the supernovae being observed, which led to the idea of dark energy, are high z (remember z is another name for redshift) supernovae? High z supernovae have light redshifted enough to see in the visible spectrum with our telescopes
Why is it important that the supernovae being observed, which led to the idea of dark energy, are high z (remember z is another name for redshift) supernovae? High z supernovae have light redshifted enough to see in the visible spectrum with our telescopes
Subject:PhysicsPrice:2.86 Bought3
Why is it important that the supernovae being observed, which led to the idea of dark energy, are high z (remember z is another name for redshift) supernovae?
High z supernovae have light redshifted enough to see in the visible spectrum with our telescopes.
High z supernovae are always paired with Cepheid star systems, so we can calculate their distances.
High z supernovae are brighter than regular supernovae.
High z means that the supernovae are far enough away for us to detect changes in the expansion rate.
Purchase A New Answer
Custom new solution created by our subject matter experts
GET A QUOTE
Answer Preview
Answer: High z means that the supernovae are far enough away for us to detect changes in the expansion rate.
Explanation: It is believed that the energy from the Big Bang has drove the universe's early expansion and since then, gravity and dark energy have engaged in a cosmic tug of war. Gravity pulls galaxies closer together; dark energy pushes them apart. Thus for us to better understand dark energy we need supernovae that have higher redshift for since higher redshift means higher expansion rate.
