Improved velocity law parameterization for hot star winds

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Volume 534 (October 2011)

A&A, 534 (2011) A97

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Table 1

Best-fit parameters to the radial velocity from hydrodynamic models (Krtička & Kubát 2010) for selected stars and individual velocity parameterizations.

Star	HD number				β law Eq. (1)		Eq. (2b) for n = 3
		R_∗	M	T_eff	v_∞,β	β
		[R_⊙]	[M_⊙]	[K]	[km s^-1]		[km s^-1]

O stars
ξ Per	HD 24912	14.0	36	35 000	2130	0.70	1270	980	−220	60
ι Ori	HD 37043	21.6	41	31 400	2170	0.83	1190	1040	−120	30
15 Mon	HD 47839	9.9	32	37 500	3240	0.90	1700	1590	−90	20
	HD 54662	11.9	38	38 600	2200	0.79	1230	1070	−180	−10
	HD 93204	11.9	41	40 000	2210	0.79	1240	1070	−170	0
ζ Oph	HD 149757	8.9	21	32 000	1940	0.85	1060	930	−50	70
68 Cyg	HD 203064	15.7	38	34 500	1970	0.76	1120	920	−150	50
19 Cep	HD 209975	22.9	47	32 000	2090	0.82	1160	1010	−120	30

Central stars of planetary nebulae
NGC 2392		1.5	0.41	40 000	540	0.86	290	270	−50	−20
NGC 3242		0.3	0.53	75 000	2070	0.68	1260	920	−290	60
IC 4637		0.8	0.87	55 000	1350	0.89	710	680	−70	−30
IC 4593		2.2	1.11	40 000	730	0.88	390	360	−60	−30
IC 418		2.7	1.33	39 000	800	0.87	420	380	−70	−20
Tc 1		3.0	1.37	35 000	910	0.95	460	440	−30	−10
NGC 6826		2.2	1.40	44 000	880	0.88	470	430	−60	−30

Notes. The stellar parameters (radius R_∗, mass M, and the effective temperature T_eff) are taken from Repolust et al. (2004), Markova et al. (2004), Pauldrach et al. (2004), and Martins et al. (2005).

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