Differential rotation in rapidly rotating early-type stars - I. Motivations for combined spectroscopic and interferometric studies

J. Zorec; Y. Frémat; A. Domiciano de Souza; O. Delaa; P. Stee; D. Mourard; L. Cidale; C. Martayan; C. Georgy; S. Ekström

doi:10.1051/0004-6361/201015691

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Volume 526 (February 2011)

A&A, 526 (2011) A87

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Table 6

Visibility ratios dV²/ ⟨ V² ⟩ calculated for different B sub-spectral types and luminosity classes, with several equator-to-polar radius ratios R_e/R_p. The visibility ratios are calculated at λ = 5500 Å for two baselines and apparent visible magnitudes V.

		B = 156 m			B = 300 m

		R_e/R_p			R_e/R_p
D (pc)	θ_o (mas)	1.05	1.10	1.25	1.05	1.10	1.25

		B0V
316	0.203	0.036	0.070	0.143	0.151	0.274	0.550
501	0.128	0.015	0.029	0.055	0.056	0.102	0.210
		B0III
457	0.195	0.036	0.063	0.131	0.135	0.252	0.510
724	0.123	0.015	0.026	0.052	0.050	0.094	0.194
		B2V
174	0.262	0.063	0.117	0.242	0.277	0.504	0.954
275	0.165	0.024	0.044	0.093	0.096	0.176	0.362
		B2III
302	0.250	0.056	0.107	0.218	0.248	0.453	0.868
479	0.158	0.021	0.041	0.084	0.085	0.161	0.327
		B8V
57	0.433	0.036	0.067	0.139	0.145	0.269	0.536
91	0.273	0.015	0.028	0.054	0.055	0.099	0.204
		B8III
115	0.414	0.173	0.315	0.627	1.329	1.750	1.966
182	0.261	0.062	0.116	0.240	0.274	0.499	0.946

Notes. D is the distance and θ_o is the angular diameter. For a given spectral type, the first line is for V = 4 mag and the second for V = 5 mag.

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