Understanding the dynamical structure of pulsating stars - HARPS spectroscopy of the δ Scuti stars ρ Puppis and DX Ceti

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Table 1

Least-squares parameters of the HARPS radial velocity curves of ρ Pup (T₀ = BJD 2456293.0056) and DX Cet (T₀ = BJD 2456272.5889).

ρ Pup				DX Cet

ID	Frequency	Amplitude	Phase	ID	Frequency	Amplitude	Phase
	[d^-1]	[km s^-1]	[0, 2π]		[d^-1]	[km s^-1]	[0, 2π]

f₁	7.098	4.948	0.129	f₁	9.6197	11.444	0.318
	±0.001	±0.011	±0.008		±0.0001	±0.007	±0.001
2f₁		0.297	5.102	2f₁		1.890	5.308
		±0.012	±0.007			±0.008	±0.005
3f₁		0.039	2.541	3f₁		0.377	3.953
		±0.012	±0.364			±0.007	±0.020
4f₁		0.022	5.103	4f₁		0.092	2.542
		±0.008	±0.651			±0.008	±0.089
f₂	7.900	0.281	2.613	5f₁		0.022	0.656
	±0.007	±0.027	±0.149			±0.008	±0.357
Mean rad. vel. [km s^-1]		46.739 ± 0.002				25.516 ± 0.004
Residual rms [km s^-1]		0.041				0.023

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