2018A&A...611A...5S


Query : 2018A&A...611A...5S

2018A&A...611A...5S - Astronomy and Astrophysics, volume 611A, 5-5 (2018/3-1)

Large Interstellar Polarisation Survey. II. UV/optical study of cloud-to-cloud variations of dust in the diffuse ISM.

SIEBENMORGEN R., VOSHCHINNIKOV N.V., BAGNULO S., COX N.L.J., CAMI J. and PEEST C.

Abstract (from CDS):

It is well known that the dust properties of the diffuse interstellar medium exhibit variations towards different sight-lines on a large scale. We have investigated the variability of the dust characteristics on a small scale, and from cloud-to-cloud. We use low-resolution spectro-polarimetric data obtained in the context of the Large Interstellar Polarisation Survey (LIPS) towards 59 sight-lines in the Southern Hemisphere, and we fit these data using a dust model composed of silicate and carbon particles with sizes from the molecular to the sub-micrometre domain. Large (≥6nm) silicates of prolate shape account for the observed polarisation. For 32 sight-lines we complement our data set with UVES archive high-resolution spectra, which enable us to establish the presence of single-cloud or multiple-clouds towards individual sight-lines. We find that the majority of these 35 sight-lines intersect two or more clouds, while eight of them are dominated by a single absorbing cloud. We confirm several correlations between extinction and parameters of the Serkowski law with dust parameters, but we also find previously undetected correlations between these parameters that are valid only in single-cloud sight-lines. We find that interstellar polarisation from multiple-clouds is smaller than from single-cloud sight-lines, showing that the presence of a second or more clouds depolarises the incoming radiation. We find large variations of the dust characteristics from cloud-to-cloud. However, when we average a sufficiently large number of clouds in single-cloud or multiple-cloud sight-lines, we always retrieve similar mean dust parameters. The typical dust abundances of the single-cloud cases are [C]/[H]=92ppm and [Si]/[H]=20ppm.

Abstract Copyright: © ESO 2018

Journal keyword(s): dust, extinction - polarization - ISM: clouds - ISM: abundances

Simbad objects: 61

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Number of rows : 61
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HD 36982 Or* 05 35 09.8363878512 -05 27 53.216296776 8.00 8.58 8.46     B1.5Vp 196 0
2 * tet01 Ori B EB* 05 35 16.1339860056 -05 23 06.784444248 7.71 8.20 7.96     B1V 357 2
3 M 42 HII 05 35 17.3 -05 23 28           ~ 3918 0
4 HD 37367 * 05 39 18.3135535104 +29 12 54.788852916 5.6 6.116 5.984     B2IV-V 127 0
5 HD 37903 Em* 05 41 38.3891026008 -02 15 32.479650720 7.32 7.94 7.83 7.64 7.52 B3IV 340 1
6 HD 38087 ** 05 43 00.5754723576 -02 18 45.389406240 7.96 8.40 8.29 8.06 7.89 B3II 159 1
7 HD 251204 V* 06 05 05.6666038296 +23 23 38.533246404 10.21 10.52 10.2     B0 52 0
8 HD 252325 Y*? 06 09 00.3115263192 +20 38 25.889095968 10.94 11.2 10.79     O9V(n) 58 0
9 HD 45314 Be* 06 27 15.7784072112 +14 53 21.212913660 5.91 6.79 6.64     O9:npe 165 0
10 CD-28 5205 * 07 58 42.9416069832 -28 26 19.827538836 10.75 11.42 11.12 11.09   B3/4 30 0
11 Cl Ruprecht 44 128 * 07 59 12.0461278272 -28 34 04.211837076 11.29 11.93 11.57 11.61   O9 27 0
12 HD 73882 EB* 08 39 09.53412 -40 25 09.2608 7.07 7.59 7.19 6.67 6.30 O8.5IV 229 2
13 HD 75309 V* 08 47 27.9647002224 -46 27 03.958625664 7.05 7.82 7.84 8.77   B2Ib/II 69 0
14 HD 79186 s*b 09 11 04.3980934536 -44 52 04.448548776 4.65 5.22 5.00 4.71 4.49 B5Ia 133 0
15 HD 89137 * 10 15 40.0854126480 -51 15 24.093239544 7.02 7.93 7.97 8.82   ON9.7II(n) 90 1
16 HD 91824 SB* 10 34 46.6322493936 -58 09 22.038466896 7.17 8.11 8.14 9.02   O7V((f))z 140 0
17 HD 91983 * 10 35 54.2060148744 -58 15 26.970947496 7.79 8.62 8.55 8.49 8.42 B2III 77 0
18 HD 93160 SB* 10 44 07.2603347496 -59 34 30.623536272 7.27 7.99 7.60 8.46   O7III((f)) 107 0
19 V* V560 Car SB* 10 44 33.7393258944 -59 44 15.434446956 6.89 7.80 7.75 7.56 7.46 O3.5V((f))+O8V 289 0
20 HD 93222 Y*O 10 44 36.2481200208 -60 05 28.890759120 7.26 8.18 8.10 8.91   O7V((f))z 189 0
21 HD 303308 ** 10 45 05.9147911152 -59 40 05.925360036 7.45 8.30 8.17 7.92 7.75 O4.5V((fc)) 288 0
22 HD 93632 * 10 47 12.6337916088 -60 05 50.814051396 7.89 8.69 9.10 9.04   O5Ifvar 85 0
23 HD 93843 Er* 10 48 37.7715351864 -60 13 25.518487656 6.37 7.29 7.33 8.23   O5III(fc) 165 0
24 HD 94493 V* 10 53 15.0996282120 -60 48 53.198014608 6.43 7.75 7.59 8.17   B0.5Iab/b 89 0
25 HD 96715 * 11 07 32.8167251952 -59 57 48.704400540 7.51 8.32 8.28 9.04   O4V((f))z 109 0
26 V* EM Car EB* 11 12 04.5060592584 -61 05 42.944560584 8.06 8.80 8.54 9.25   O7.5V((f))+O7.5V((f)) 156 0
27 HD 99953 s*b 11 29 15.1353875280 -63 33 14.179307040 6.28 6.88 6.57 6.16 5.92 B2Ia 97 0
28 HD 103779 * 11 56 57.5476332144 -63 14 56.724069084 6.35 7.185 7.220 8.32   B0/1II 95 0
29 HD 104705 Pu* 12 03 23.9085250488 -62 41 45.832183224 6.94 9.56 9.11 8.85   B0III/IV 108 0
30 V* BU Cru EB* 12 53 37.6193092848 -60 21 25.425832356 6.49 7.04 6.84 7.55   B2Ib 108 0
31 HD 112272 s*b 12 56 33.7346692008 -64 21 39.191498640 7.87 8.057 7.379 7.95   B0.5Ia 78 0
32 CPD-63 2495 HXB 13 02 47.6544015048 -63 50 08.626970292 10.34 10.72 9.98 10.03   O9.5Ve 731 0
33 HD 116852 * 13 30 23.5185791544 -78 51 20.547734652 8.29 8.38 8.47     O8.5II-III((f)) 140 1
34 HD 122879 V* 14 06 25.1578487688 -59 42 57.254187024 5.90 6.64 6.50 6.33 6.18 B0Ia 164 1
35 V* BU Cir bC* 14 45 10.9595976864 -55 36 05.906309508 5.23 6.016 6.089     B2III 91 0
36 HD 134591 * 15 11 51.0100782768 -34 45 47.426226588 8.08 8.38 8.37     B5III 19 0
37 HD 147888 ** 16 25 24.2915998776 -23 27 36.747568152 6.71 7.05 6.74     B3V 205 0
38 HD 147889 Y*O 16 25 24.3163637976 -24 27 56.569805208 8.56 8.73 7.90     B2V 457 1
39 HD 148379 Be* 16 29 42.3277745448 -46 14 35.630932596 5.51 5.95 5.37 4.85 4.39 B2Iab 174 0
40 HD 149404 s*b 16 36 22.5628499784 -42 51 31.902127776 5.23 5.88 5.52 6.90   O8.5Iab(f)p 237 1
41 HD 151804 s*b 16 51 33.7218052272 -41 13 49.919519496 4.45 5.29 5.22     O8Iaf 364 0
42 HD 151805 * 16 51 35.7118253472 -41 46 35.556351744 8.27 8.99 8.86 9.56   B1Ib 54 0
43 HD 152235 s*b 16 53 58.8528412848 -41 59 39.577848180 6.47 6.92 6.38 5.84 5.42 B0.5Ia 182 0
44 HD 152248 EB* 16 54 10.0618206816 -41 49 30.139291596 5.56 6.15 6.088     O7Iabf+O7Ib(f) 244 0
45 HD 152249 s*b 16 54 11.6395658856 -41 50 57.295111524 5.91 6.65 6.45     OC9Iab 227 0
46 HD 152408 s*b 16 54 58.5051071856 -41 09 03.093075612 5.17 5.92 5.77 7.00   O8Iape 362 0
47 HD 152424 s*b 16 55 03.3294878112 -42 05 26.990821824 6.11 6.69 6.27 7.49   OC9.2Ia 190 0
48 HD 153919 HXB 17 03 56.7725629224 -37 50 38.913331452 6.06 6.78 6.51 6.08 5.90 O6Iafcp 783 1
49 HD 154368 s*b 17 06 28.3687759224 -35 27 03.760593156 6.10 6.63 6.13 7.12   O9.5Iab 277 0
50 HD 163181 EB* 17 56 16.0779925656 -32 28 29.971960608 6.47 6.99 6.61     O9.5Ia/ab 162 0
51 HD 164073 * 18 02 00.5634000360 -48 48 37.652476032 7.55 8.05 8.03     B3III/IV 24 0
52 HD 164740 ISM 18 03 38.3 -24 22 35     9.10     ~ 19 1
53 HD 315023 * 18 04 20.5582786632 -24 13 54.787761984 9.65 10.182 10.028 10.24 9.753 B3V+ 28 0
54 HD 167838 V* 18 17 37.7108042088 -15 25 50.562693948 6.83 7.19 6.73 7.60   B3Ia/ab 93 0
55 BD-13 4920 Y*O 18 18 26.1965979744 -13 50 05.484778872 11.068 10.55 10.06   9.236 B1V 41 0
56 HD 168076 ** 18 18 36.4205083536 -13 48 02.420915796 8.12 8.72 8.25 7.62 7.21 O4III(f) 188 0
57 HD 169454 s*b 18 25 15.1937863728 -13 58 42.309359544 7.39 7.61 6.71 5.82 5.13 B1Ia 323 0
58 HD 170740 SB* 18 31 25.6939245072 -10 47 45.008376432 5.51 5.96 5.72     B2V+ 182 1
59 HD 174889 PM* 18 53 21.4269007488 -14 18 51.698499660   9.506 8.608     K4III 9 0
60 HD 203532 * 21 33 54.5744476728 -82 40 59.106857160 6.15 6.51 6.38     B3.5V 92 0
61 HD 210121 * 22 08 11.9027578440 -03 31 52.765490316   7.84 7.68     B7II 161 0

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2022.08.09-03:23:17

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