2025ApJ...987...87J

Query : 2025ApJ...987...87J

2025ApJ...987...87J - Astrophys. J., 987, 87 (2025/July-1)

The TRGB-SBF Project. III. Refining the HST Surface Brightness Fluctuation Distance Scale Calibration with JWST.

JENSEN J.B., BLAKESLEE J.P., CANTIELLO M., COWLES M., ANAND G.S., TULLY R.B., KOURKCHI E. and RAIMONDO G.

Abstract (from CDS):

The TRGB-SBF Project team is developing an independent distance ladder using a geometrical calibration of the tip of the red giant branch (TRGB) method in elliptical galaxies that can, in turn, be used to set the surface brightness fluctuation (SBF) distance scale independent of Cepheid variables and Type Ia supernovae. The purpose of this project is to measure the local expansion rate of the Universe independently of the methods that are most at odds with the theoretically predicted value of the Hubble-Lemaître constant H0, and therefore isolate the influence of potential systematic observational errors. In this paper, we use JWST TRGB distances calibrated using the megamaser galaxy NGC 4258 to determine a new Cepheid-independent SBF zero-point with the Hubble Space Telescope. This new calibration, along with improved optical color measurements from Pan-STARRS and DECam, gives an updated value of H0 = 73.8 ± 0.7 (statistical) ±2.3 (systematic) km s–1 Mpc–1 that is virtually identical to the SBF Hubble-Lemaître constant measured by J. P. Blakeslee et al.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Distance indicators - Galaxy distances - Hubble constant

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 1340 GiG 03 28 19.6251763296 -31 04 05.435465520   11.20 10.32 9.70   ~ 222 1
2 NGC 1374 EmG 03 35 16.5885737352 -35 13 34.563417168 12.46 11.97 11.08 10.59   ~ 322 1
3 NGC 1375 GiG 03 35 16.8025873104 -35 15 56.371399740 13.50 13.02 12.40 11.74   ~ 175 1
4 NGC 1380 Sy2 03 36 27.590 -34 58 34.68 11.32 10.94 9.93 9.37   ~ 460 1
5 NGC 1399 rG 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1636 1
6 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
7 NGC 1404 rG 03 38 51.917 -35 35 39.81 11.53 10.69 10.00 9.03   ~ 787 1
8 IC 2006 EmG 03 54 28.4628183240 -35 58 01.673622516   12.39   10.94 11.9 ~ 217 0
9 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
10 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2512 4
11 NGC 4458 GiP 12 28 57.5613938232 +13 14 30.946545276 13.27 12.93 12.07     ~ 429 2
12 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2174 2
13 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
14 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
15 NGC 4489 GiG 12 30 52.2472748976 +16 45 31.866359004   13.2       ~ 264 0
16 M 89 Sy2 12 35 39.80733343 +12 33 22.8308657 11.29 10.73 9.75     ~ 1037 2
17 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1156 1
18 M 60 GiC 12 43 39.9708251934 +11 33 09.688174067   10.3       ~ 1395 1
19 NGC 4697 GiG 12 48 35.8981498824 -05 48 02.482374564   10.97   9.83   ~ 895 0
20 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 12.71 12.27 11.386 ~ 814 3
21 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2

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