Critical study of the distribution of rotational velocities of Be stars - II: Differential rotation and some hidden effects interfering with the interpretation of the V sin i parameter

J. Zorec; Y. Frémat; A. Domiciano de Souza; F. Royer; L. Cidale; A.-M. Hubert; T. Semaan; C. Martayan; Y. R. Cochetti; M. L. Arias; Y. Aidelman; P. Stee

doi:10.1051/0004-6361/201628761

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Volume 602 (June 2017)

A&A, 602 (2017) A83

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Table 3

Apparent fundamental parameters deduced according to several assumptions about the structure of gravity darkened atmospheres.

		K						K
		log g^pnrc = 4.0 dex						log g^pnrc = 4.0 dex
		V_eq = 376 km s^-1						V_eq = 476 km s^-1

i	Model	W₄₄₇₁	W₄₄₈₁		log g^app	(Vsini)^app		W₄₄₇₁	W₄₄₈₁		log g^app	(Vsini)^app

		Å	Å	K	dex	He	Mg	Å	Å	K	dex	He	Mg

	(a)	0.535	0.322	12 850	4.10	174	171	1.273	0.161	22 000	3.81	225	212
30°	(b)	0.523	0.330	12 770	4.24	199	212	1.440	0.167	22 000	4.07	260	264
	(c)	0.501	0.349	12 620	4.56	152	181	1.265	0.176	20 830	3.71	223	239
	(a)	0.472	0.311	12 410	3.65	274	278	1.138	0.153	22 210	3.62	348	348
60°	(b)	0.483	0.325	12 490	3.98	311	334	1.382	0.163	22 050	3.99	411	414
	(c)	0.388	0.355	11 730	4.22	231	293	1.148	0.178	20 370	3.48	351	384
	(a)	0.380	0.296	11 640	2.73	289	301	0.974	0.143	22 250	3.35	374	379
90°	(b)	0.416	0.318	12 020	3.60	332	363	1.313	0.159	22 340	3.90	446	450
	(c)	0.251	0.364	9 720	3.32	234	314	1.009	0.180	18 580	3.20	375	415

Notes. (a) GD models with uniform radiation source function; (b) no GD but θ-dependent effective gravity; (c) the classical von Zeipel GD. W₄₄₇₁ and W₄₄₈₁ are the equivalent widths of the He i 4471 and Mg ii 4481 lines, respectively.

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