Homing in on Polaris: A 7 M⊙ first-overtone Cepheid entering the instability strip for the first time

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Table A.2

Period-radius relations of the form log (R∕R_⊙) = A + B ⋅ log (P [d]) for FO Cepheids on the first IS crossing based on fit of predictions provided by A16.

Metallicity	B_b	A_b	B_r	A_r
Solar (0.014)	0.748	1.256	0.737	1.232
LMC (0.006)	0.760	1.250	0.751	1.223
SMC (0.002)	0.764	1.240	0.756	1.212

Notes. Subscripts _b and _r denote relations valid at the hot (blue) and cool (red) IS boundary, respectively.

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