Suppose that while analysing the optical spectrum of a galaxy, you observe the Hα absorption line to be located at a wavelength of 702 nm. Use the fact that the rest wavelength of this line is 656 nm to calculate the radial velocity of the galaxy in units of km/s. Then, use Hubbles Law (assuming the Hubble Constant to be H0 = 74 km/s/Mpc) to convert the radial velocity measurement into a distance estimate (in units of Mpc).
Suppose that while analysing the optical spectrum of a galaxy, you observe the Hα absorption line to be located at a wavelength of 702 nm. Use the fact that the rest wavelength of this line is 656 nm to calculate the radial velocity of the galaxy in units of km/s. Then, use Hubbles Law (assuming the Hubble Constant to be H0 = 74 km/s/Mpc) to convert the radial velocity measurement into a distance estimate (in units of Mpc).
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Suppose that while analysing the optical spectrum of a galaxy, you observe the Hα absorption line to be located at a wavelength of 702 nm. Use the fact that the rest wavelength of this line is 656 nm to calculate the radial velocity of the galaxy
in units of km/s. Then, use Hubbles Law (assuming the Hubble Constant to be H0 = 74 km/s/Mpc) to convert the radial
velocity measurement into a distance estimate (in units of Mpc).
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