Technetium-rich M stars: Prime diagnostics of recent third dredge-up events on the asymptotic giant branch

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Volume 702 (October 2025)

A&A, 702 (2025) A39

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Table B.2.

Spectral indices of the M stars sample.

Star	λ₄₂₃₈	λ₄₂₆₂	B_TiO	B_ZrO
Tc-rich M Stars

S Ori	4238.220	4262.252	0.71	0.31
S CMi	4238.207	4262.371	0.67	0.30
Y Lyn	4238.162	4262.247	0.55	0.29
V Mon	4238.243	4262.232	0.67	0.36
ST Her	4238.076	4262.391	0.61	0.34
AA Cam	4238.088	4262.242	0.48	0.27
T Cas	4238.164	4262.256	0.67	0.29
R Vir	4238.028	4262.279	0.52	0.20
OP Her	4237.962	4262.234	0.49	0.24
R Cas	4238.057	4262.286	0.68	0.27
R Hya	4238.244	4262.382	0.68	0.30
S Her	4238.256	4262.300	0.59	0.33
RZ Her	4238.100	4262.328	0.59	0.26

Tc-poor M Stars

TW Peg	4238.376	4262.076	0.56	0.22
V Boo	4238.369	4262.103	0.59	0.23
Z UMa	4238.424	4262.137	0.59	0.21
X Her	4238.389	4262.096	0.57	0.21
TV Psc	4238.387	4262.112	0.40	0.17
X Oph	4238.354	4262.160	0.59	0.22
Z Eri	4238.394	4262.130	0.51	0.20
R Leo	4238.341	4262.098	0.64	0.28
TU CVn	4238.389	4262.103	0.49	0.22
AF Cyg	4238.387	4262.145	0.59	0.21
BS 7442	4238.382	4262.147	0.41	0.22
EU Del	4238.384	4262.114	0.51	0.18
LQ Her	4238.377	4262.098	0.43	0.22
XY Lyr	4238.403	4262.111	0.48	0.21
RR Eri	4238.400	4262.116	0.52	0.22
RV Boo	4238.311	4261.994	0.59	0.23
R CVn	4238.404	4261.954	0.64	0.26
V1351 Cyg	4238.379	4262.099	0.51	0.23
NZ Gem	4238.388	4262.110	0.34	0.20
UV Her	4238.353	4262.094	0.67	0.26
V Cas	4238.404	4262.123	0.69	0.32

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