The envelope of the power spectra of over a thousand δ Scuti stars - The T̅eff − νmax scaling relation

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Table 1

Parameters of the fitted scaling relation taking into account different definitions of the frequency at maximum power.

	Slope	Y-intercept	σ	R	P_u
Def.^a	(K/μHz)	± 50 (K)	(%)		(10⁻³⁰%)
ν_max	2.94 ± 0.24	6980	5.82	0.424	7
ν₀	2.39 ± 0.20	7110	5.87	0.408	1680
	2.76 ± 0.23	7024	5.84	0.421	23

Notes. ^(a) We tested the following definitions: the weightedmean frequency (ν_max, see Eq. (4)), the frequency of the highest amplitude mode (ν₀), and the weighted mean frequency of the power spectrum (, see Eq. (6)).

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