Large Interstellar Polarisation Survey - III. Observational constraints on the structure of grains

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Table 2

Dust parameters of the 27 sightlines that have been modelled.

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16

Star	a/b	V_vac	m_μA	m_Si	m_vSi	m_aC	m_vgr	m_PAH	q	$r_{p o l, S i}^{-}$ $Mathematical equation: $r^-_{\text{{{pol}}, Si}}$$	$r_{p o l, a C}^{-}$ $Mathematical equation: $r^-_{\text {{pol}}, aC}$$	Ω	$\frac{[S i]}{[H]}$ $Mathematical equation: $\frac{[\rm{Si}]}{[\rm{H}]}$$	$\frac{[C]}{[H]}$ $Mathematical equation: $\frac{[\rm{C}]}{[\rm{H}]}$$	${(\frac{τ_{s μ}}{τ_{t}})}_{V}$ $Mathematical equation: $\left(\frac{\tau_{\rm {s}\upmu}}{\tau_{\rm {t}}}\right)_{\rm V}$$
					(%)					(nm)		(°)	(ppm)		(%)
HD 027778	2.0	10	25	37	28	5	3	1	2.3	112	–	38	42	78	20
HD 037903	2.0	10	33	31	18	13	4	1	2.1	143	69	50	32	108	37
HD 038023	1.5	5	32	37	19	8	2	2	2.6	25	–	53	38	88	34
HD 046223	1.5	5	30	33	24	8	4	1	2.6	136	–	63	37	91	29
HD 054439	1.5	5	—	58	21	13	5	3	2.8	112	69	27	38	93	0
HD 062542	1.5	5	25	28	35	8	3	1	2.8	143	–	76	49	110	22
HD 070614	2.0	10	–	52	22	18	6	2	2.5	143	42	47	34	109	0
HD 091824	2.0	10	41	33	14	9	2	1	2.3	102	–	51	36	96	52
HD 092044	2.0	10	34	36	19	8	2	1	2.6	112	88	39	38	89	48
HD 093222	1.5	5	35	34	13	15	2	1	2.5	30	–	41	32	110	38
HD 108927	2.0	10	30	32	20	13	4	1	2.0	97	–	46	33	106	23
HD 110946	2.0	10	19	39	27	10	4	1	2.8	143	54	49	37	92	9
HD 112607	1.5	5	–	39	39	13	6	3	2.7	143	–	37	35	96	0
HD 112954	2.0	10	8	32	44	10	5	1	2.5	183	54	60	43	94	1
HD 129557	1.5	5	35	44	12	3	4	2	2.0	102	–	47	41	81	42
HD 146285	1.5	5	39	31	10	15	4	1	2.0	143	69	61	28	114	33
HD 152245	1.5	5	35	38	14	8	3	2	2.6	112	88	40	37	91	44
HD 152249	1.5	5	63	21	9	5	1	1	2.3	201	92	40	38	94	44
HD 170740	1.5	5	–	46	29	16	6	3	2.8	183	26	72	35	103	0
HD 185418	1.5	5	27	43	13	10	5	2	2.5	112	88	32	35	98	19
HD 287150	2.0	10	17	32	34	13	3	1	2.8	143	8	36	36	97	6
HD 294304	1.5	5	27	36	23	10	3	1	2.7	102	–	34	37	95	23
HD 303308	2.0	10	26	38	23	9	3	1	2.4	112	88	52	39	88	20
HD 315021	1.5	5	33	40	10	13	3	1	2.4	118	–	30	35	103	35
HD 315023	1.5	5	32	38	11	15	2	2	2.5	143	88	53	33	108	32
HD 315024	1.5	5	67	15	7	8	2	1	2.3	47	–	53	45	170	46
HD 315032	2.0	5	34	33	17	11	4	1	2.3	112	–	16	34	104	43

median			31	37	19	10	3	1	2.5	118	69		37	96	32
sigma			16	8	9	4	1	1	0.3	23	25		4	17	17

Notes. For HD 091824 and HD 146285, the maximum grain size is r₊ = 3 μm; otherwise, r₊ = 1 μm. The derived C and Si abundances in the grains and the contribution of micrometre-sized dust agglomerates to the total optical depth are specified in Cols. 14-16. The median values and 1σ variations of the parameters are provided, excluding r^-_polsi for the two stars HD 038023 and HD 093222, as they exhibit peculiar polarisation spectra peaking in the B band.

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