Table 1.
Information used to estimate redshift-Leavitt bias for anchor and SN-host galaxies in SH0ES Cepheids-based distance ladder (R+16).
| Galaxy | NCep | μ | ⟨σPL⟩ | zobs | Refz | Δzobs, RF | Δlog P | Δμ | Δd = d0 − dLL |
|---|---|---|---|---|---|---|---|---|---|
| [mag] | [mag] | [10−3] | [10−3] | [d] | [mmag] | [Mpc] | |||
| Anchor galaxies, ⟨zobs, cal⟩ = 0.48 × 10−3 | |||||||||
| Milky Way | 50 | − | 0.08 | 0 | − | − | − | − | |
| LMC | 785 | 18.477 | 0.12 | 0.92 | m | − | − | − | − |
| NGC 4258 | 139 | 29.397 | 0.15 | 1.49 | a | − | − | − | − |
| SN-host galaxies, ⟨zobs, LL⟩ = 4.76 × 10−3 | |||||||||
| M 101 | 251 | 29.135 | 0.32 | 0.80 | a | 0.32 | 0.007 | 0.2 | −0.001 |
| NGC 1015 | 14 | 32.497 | 0.36 | 8.77 | b | 8.29 | 0.353 | 11.5 | −0.168 |
| NGC 1309 | 44 | 32.523 | 0.36 | 7.12 | c | 6.64 | 0.281 | 9.2 | −0.135 |
| NGC 1365 | 32 | 31.307 | 0.32 | 5.45 | d | 4.97 | 0.209 | 6.8 | −0.057 |
| NGC 1448 | 54 | 31.311 | 0.36 | 3.90 | c | 3.41 | 0.141 | 4.6 | −0.039 |
| NGC 2442 | 141 | 31.511 | 0.38 | 4.89 | b | 4.41 | 0.184 | 6.0 | −0.056 |
| NGC 3021 | 18 | 32.498 | 0.51 | 5.14 | a | 4.66 | 0.195 | 6.4 | −0.093 |
| NGC 3370 | 63 | 32.072 | 0.33 | 4.27 | e | 3.78 | 0.157 | 5.1 | −0.061 |
| NGC 3447 | 80 | 31.908 | 0.34 | 3.56 | f | 3.07 | 0.127 | 4.1 | −0.046 |
| NGC 3972 | 42 | 31.587 | 0.38 | 2.84 | g | 2.36 | 0.095 | 3.1 | −0.030 |
| NGC 3982 | 16 | 31.737 | 0.32 | 3.70 | a | 3.21 | 0.133 | 4.3 | −0.044 |
| NGC 4038 | 13 | 31.290 | 0.33 | 5.48 | h | 4.99 | 0.210 | 6.8 | −0.057 |
| NGC 4424 | 3 | 31.080 | 0.56 | 1.46 | i | 0.97 | 0.035 | 1.2 | −0.009 |
| NGC 4536 | 33 | 30.906 | 0.29 | 6.03 | j | 5.55 | 0.234 | 7.6 | −0.053 |
| NGC 4639 | 25 | 31.532 | 0.45 | 3.40 | b | 2.91 | 0.120 | 3.9 | −0.036 |
| NGC 5584 | 83 | 31.786 | 0.33 | 5.46 | c | 4.98 | 0.209 | 6.8 | −0.072 |
| NGC 5917 | 13 | 32.263 | 0.38 | 6.35 | k | 5.87 | 0.248 | 8.1 | −0.106 |
| NGC 7250 | 22 | 31.499 | 0.43 | 3.89 | l | 3.41 | 0.141 | 4.6 | −0.042 |
| UGC 9391 | 28 | 32.919 | 0.43 | 6.38 | l | 5.90 | 0.249 | 8.1 | −0.144 |
Notes. The number of Cepheids in each galaxy, NCep, approximate distance modulus μ, and PL-relation dispersion σPL are all taken from R+16. Heliocentric redshifts zobs are compiled from NED, with original references Refz as follows: a: de Vaucouleurs et al. (1991), b: Meyer et al. (2004), Wong et al. (2006), c: Koribalski et al. (2004), d: Bureau et al. (1996), e: Krumm & Salpeter (1980), f: Guthrie & Napier (1996), g: Verheijen & Sancisi (2001), h: Lauberts & Valentijn (1989), i: Kent et al. (2008), j: Grogin et al. (1998), k: Strauss et al. (1992), l: Schneider et al. (1992), m: Richter et al. (1987). The redshift for the anchor galaxies and SN-host galaxies, weighted by σPL, are shown above each group. Δzobs, RF = zobs − zobs, cal is the redshift difference between each SN-host galaxy and the anchor reference frame. The shift in logarithmic oscillation period, Δlog P (cf. Eq. (5)), the overestimate of distance modulus Δμ (cf. Eq. (10)), and the distance bias Δd (cf. Eq. (11)) are computed using Δzobs, RF.
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