A long-term study of the magnetic field and activity in the M giant RZ Ari - Magnetism and planet engulfment in a fairly evolved star?

Open Access

Table 2

Parameters and chemical composition of RZ Ari from our model predictions at two evolutionary stages (RGB tip and early AGB) compatible with the radius as derived in this work by interferometry and luminosity as derived from IR measurements by Villaume et al. (2017; both values highlighted in boldface in Table 1).

Parameter	RGB	eAGB
Mass (M_⊙)	1.37	1.21
log(L/L_⊙)	3.148	3.139
R (R_⊙)	107.92	107.92
T_eff (K)	3434	3436
A(⁷Li)	0.637	0.134
¹²C/¹³C	17	14
¹⁶O/¹⁷O	688	655
¹⁶O/¹⁸O	675	700
τ_c (days)	5.48	11.6

Notes. The mass is given here at the evolutionary point.

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