ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT) - VII. The layered molecular outflow from HL Tau and its relationship with the ringed disk

Open Access

Table 1

Properties of the features of family B measured in the transverse PV_⊥ diagrams and derived outflow parameters.

	y [arcsec]	x₋ [arcsec]	x₊ [arcsec]	V₋ [km s⁻¹]	V₊ [km s⁻¹]	z [10³ au]	r [10² au]	V_z [km s⁻¹]	V_ϕ [km s⁻¹]	α [deg]	V_p [km s⁻¹]	J = rV_ϕ [10² au km s⁻¹]	r₀ [au]	λ_ϕ
B1a	4.5	−3.50	3.54	11.95	14.68	0.9	5.2	9.0	1.88	21.1	9.7	9.8	57	3.0
	5.0	−3.88	3.84	12.40	15.10	1.0	5.7	9.7	1.86	21.1	10.4	10.6	58	3.2
	5.5	−4.06	4.06	12.82	15.47	1.1	6.0	10.2	1.83	21.1	11.0	10.9	56	3.4
	6.0	−4.35	4.27	13.25	15.95	1.2	6.3	10.9	1.86	21.1	11.7	11.8	57	3.6
	6.5	−4.59	4.57	13.41	16.08	1.3	6.7	11.1	1.84	21.1	11.9	12.4	58	3.8
	7.0	−4.84	4.95	13.46	16.11	1.4	7.2	11.2	1.83	21.1	12.0	13.2	61	3.9
B1b	4.5	−3.89	3.67	10.80	13.40	0.9	5.6	7.3	1.79	23.2	7.9	10.0	71	2.8
	5.0	−4.24	4.02	11.34	13.89	1.0	6.1	8.0	1.76	23.2	8.7	10.7	69	3.0
	5.5	−4.50	4.41	11.67	14.18	1.1	6.6	8.5	1.73	23.2	9.2	11.4	70	3.2
	6.0	−5.02	4.53	11.90	14.50	1.2	7.0	8.9	1.79	23.2	9.6	12.6	74	3.4
	6.5	−5.15	4.76	12.09	14.65	1.3	7.3	9.1	1.76	23.2	9.9	12.9	73	3.5
	7.0	−5.43	5.15	12.32	14.90	1.4	7.8	9.5	1.78	23.2	10.3	13.9	75	3.7
B2	6.0	−5.34	4.70	11.10	13.60	1.2	7.4	7.6	1.72	17.5	8.0	12.7	90	3.1
	6.5	−5.52	5.03	11.50	13.90	1.3	7.8	8.1	1.65	17.5	8.5	12.9	85	3.2
	7.0	−5.70	5.52	11.60	14.10	1.4	8.3	8.4	1.72	17.5	8.8	14.2	89	3.5
	7.5	−5.89	5.65	12.08	14.43	1.5	8.5	8.9	1.62	17.5	9.4	13.8	83	3.5
	8.0	−6.18	5.73	12.29	14.57	1.6	8.8	9.2	1.57	17.5	9.6	13.8	80	3.6
	8.5	−6.47	5.84	12.33	14.67	1.7	9.1	9.3	1.61	17.5	9.8	14.6	84	3.7
	9.0	−6.56	6.09	12.41	14.70	1.8	9.3	9.4	1.58	17.5	9.8	14.7	84	3.7
	9.5	−7.10	6.39	12.40	14.80	1.9	9.9	9.4	1.65	17.5	9.9	16.4	92	4.0
	10	−7.16	6.53	12.45	14.87	2.0	10.1	9.5	1.67	17.5	10.0	16.8	93	4.1

Notes. Listed parameters, from left to right: (1) Feature identification as in the bottom right panel of Fig. 8; (2) Offset from the source of the considered PV_⊥ diagram; (3,4) x coordinates and (5,6) V_LSRvelocity of the SE and NW apexes of the fitted ellipse; (7) Offset from the source z = y/ sin i deprojected along the flow axis (i=46.5°); (8,9,10) Shell radius r, axial velocity V_z, and toroidal velocity V_ϕ derived from Eq. (1); (11) Tangent angle to the shell, from the fit of r = r(z); (12) Poloidal velocity V_p = V_z/ cos α; (13) Specific angular momentum J = rV_ϕ; (14) Radius of the shell footpoint calculated from Eq. (3); (15) Component $λ_{ϕ} = r V_{ϕ} / r_{0}^{2} Ω_{0}$ $\[\lambda_{\phi}=r V_{\phi} / r_{0}^{2} \Omega_{0}\]$ of the magnetic lever arm λ in Eq. (2). The uncertainties introduced by the derivation procedure are estimated to be 5% on r, 4% on V_z, and 10% on V_ϕ (and hence 15% for J). The dependence on angle α limits the accuracy in V_p to 5%. The uncertainty on r₀ is found to be 20%, from the sensitivity to variations of the input values in Eq. (3). This leads to a 25% uncertainty on λ_ϕ.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.