The VELOCE modulation zoo - III. Detecting additional pulsation modes in optical spectra of classical Cepheids using semi-partial distance correlation periodograms

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Table 6.

Overview of mode detections per data set.

			C		g		$\tilde{C}$ $\widetilde{C}$		C_g		S
Star	f_r [d⁻¹]	f_X [d⁻¹]	f_r?	f_X?	f_r?	f_X?	f_r?	f_X?	f_r?	f_X?	f_r?	f_X?
δ Cep	0.19	−−	◼	−−	◼	−−	◼	−−	◼	−−	◼	−−
BG Cru	0.30	0.33	▫	◼	◼	−−	▫	◼	−−	◼	◼	▫
X Sgr	0.14	0.08	−−	▫	◼	−−	▫	▫	−−	▫	▫	▫
Polaris	0.25	0.017	−−	◼	−−	◼	▫	◼	−−	◼	◼	▫

Notes. f_r denotes the main radial mode known from photometric variability, which is the fundamental mode for δ Cep and X Sgr, and the first overtone for BG Cru and Polaris. ◼ denotes the dominant peak (in terms of significance), ▫ denotes that that peak is present, but not dominant. – indicates the absence of peak.

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