The TRGB-SBF Project. IV. A Color Calibration of the TRGB in the JWST F090W+F150W Filters
Maksim I. Chazov, Dmitry I. Makarov, R. Brent Tully, Gagandeep S. Anand, Lidia N. Makarova, Yotam Cohen, John P. Blakeslee, Michele Cantiello, Joseph B. Jensen, Gabriella Raimondo
arXiv:2603.11160v1 Announce Type: new
Abstract: Observations with JWST in the F090W band provide a powerful tool for determining galaxy distances based on tip of the red giant branch (TRGB) measurements. It is a great convenience that the TRGB lies at an almost constant absolute magnitude level at low metallicities. However, the TRGB becomes fainter at high metallicities in the F090W filter. Details of this break in slope are critical for precision applications in the acquisition of distances. With an absolute scaling set by the maser distance to NGC 4258 (but excluding the uncertainty in that distance), the value $M^mathrm{TRGB}_mathrm{F090W} = -4.40 pm 0.03$ mag (traditional Vega) is found for $(mathrm{F090W}-mathrm{F150W})_0arXiv:2603.11160v1 Announce Type: new
Abstract: Observations with JWST in the F090W band provide a powerful tool for determining galaxy distances based on tip of the red giant branch (TRGB) measurements. It is a great convenience that the TRGB lies at an almost constant absolute magnitude level at low metallicities. However, the TRGB becomes fainter at high metallicities in the F090W filter. Details of this break in slope are critical for precision applications in the acquisition of distances. With an absolute scaling set by the maser distance to NGC 4258 (but excluding the uncertainty in that distance), the value $M^mathrm{TRGB}_mathrm{F090W} = -4.40 pm 0.03$ mag (traditional Vega) is found for $(mathrm{F090W}-mathrm{F150W})_0