The technique of using a star's spectrum to find its location on the H-R diagram, which provides an estimate of its luminosity, and thereby its distance, is called
A) the Tully-Fisher method.
B) spectroscopic parallax.
C) the Doppler shift.
D) Hubble's law.
E) trigonometric parallax.

Question

Quizplus · Accepted Answer

Spectroscopic parallax involves using a star's spectrum to determine its spectral type and luminosity class, which places it on the H-R diagram and allows for an estimation of its luminosity and distance.

The Technique of Using a Star's Spectrum to Find Its