The Tip of the Red Giant Branch Distance Ladder and the Hubble Constant
The Tip of the Red Giant Branch Distance Ladder and the Hubble Constant Siyang Li, Rachael L. Beaton arXiv:2403.17048v1 Announce Type: new Abstract: While the tip of the red giant branch (TRGB) has been used as a distance indicator since the early 1990’s, its application to measure the Hubble Constant as a primary distance indicator occurred only recently. The TRGB is also currently at an interesting crossroads as results from the James Webb Space Telescope (JWST) are beginning to emerge. In this chapter, we provide a review of the TRGB as it is used to measure the Hubble constant. First, we provide an essential reviewRead More →