1998AJ....116..266O

Query : 1998AJ....116..266O

1998AJ....116..266O - Astron. J., 116, 266-273 (1998/July-0)

Polarimetry of the highly reddened open clusters Hogg 15 and Lynga 14.

ORSATTI A.M., VEGA E. and MARRACO H.G.

Abstract (from CDS):

We present UBVRI polarimetric observations of stars belonging to the highly reddened open clusters Hogg 15 and Lyngå 14. The wavelength of maximum polarization is computed and then analyzed in the context of its relation to the optical properties and characteristic particle size distribution of the grains responsible for the polarization in each case. The amount and direction of the linear polarization are also computed.
Result. indicate that the polarization efficiency is relatively low in both cases, compared with the values attributed to the interstellar medium, and probably due to depolarization effects. Only one out of the 12 observed members in Hogg 15, and none in Lyngå 14, presents indications of intrinsic polarization in its measures. There exists some ``intracluster'' dust in association with Hogg 15, with a slightly different grain size distribution when compared with the Coalsack dust itself. For Lyngå 14, we conclude that the polarization detected in this case possibly comes from dust present in a nearby cloud located along the line of sight to the cluster, with some dust related to the cluster itself. The magnetic field in the direction to Hogg 15 follows the general trend of the polarization directions in the region, but this is not true for Lyngå 14, where differences seem to exist.

Abstract Copyright: ∼

Journal keyword(s): ISM: Dust, Extinction - Galaxy: Open Clusters and Associations: Individual: Name: Hogg 15 - Galaxy: Open Clusters and Associations: Individual: Name: Lynga 14

Simbad objects: 45

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Number of rows : 45
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 IC 2944 OpC 11 38 20.00 -63 22 22.0           ~ 191 0
2 NAME Coalsack Nebula DNe 12 31 19 -63 44.6           ~ 275 0
3 Cl* Hogg 15 M 23 * 12 43 20.6374840752 -63 05 48.847214400   15.18 14.34     ~ 8 0
4 Cl* Hogg 15 M 22 * 12 43 23.3827526160 -63 06 51.124018140   15.01 14.07     ~ 5 0
5 Cl* Hogg 15 M 10 * 12 43 31.1837671968 -63 05 25.190673684   15.76 14.84     ~ 8 0
6 Cl* Hogg 15 M 9 * 12 43 32.3415072314 -63 06 23.925521476   15.58 14.64     ~ 6 0
7 Cl Hogg 15 2 * 12 43 32.5897917106 -63 05 55.928492745   12.85 12.11     OB+ 14 0
8 V* BQ Cru Be* 12 43 32.8068543408 -63 06 11.810848968   12.6 11.5     Be 20 0
9 Cl* Hogg 15 M 8 * 12 43 35.08 -63 06 08.5   15.64 14.35     ~ 5 0
10 Cl* Hogg 15 M 7 * 12 43 35.1372428832 -63 05 57.896394972   16.06 14.46     ~ 4 0
11 Cl* Hogg 15 M 5 * 12 43 35.8814963136 -63 06 05.094473652   13.13 12.21     OB+ 15 0
12 Cl* Hogg 15 M 6 * 12 43 36.4402479619 -63 06 01.240414346   13.68 12.82     ~ 7 0
13 Cl Hogg 15 OpC 12 43 36.8 -63 06 01           ~ 61 0
14 Cl* Hogg 15 M 14 * 12 43 37.41 -63 06 14.4   15.79 14.81     ~ 5 0
15 Cl* Hogg 15 M 11 * 12 43 37.52 -63 05 51.9   16.54 15.68     ~ 5 0
16 Cl Hogg 15 16 * 12 43 37.8934931304 -63 07 34.138001496   14.6 14.0     ~ 5 0
17 Cl* Hogg 15 M 12 * 12 43 38.5564803864 -63 05 58.749906912   16.07 15.11     ~ 7 0
18 Cl* Hogg 15 M 13 * 12 43 39.0096900264 -63 06 06.071239152   15.62 14.72     ~ 7 0
19 Cl* Hogg 15 M 21 * 12 43 41.3980204488 -63 05 47.324273496   15.61 14.68     ~ 7 0
20 Cl* Hogg 15 M 15 * 12 43 43.62 -63 06 54.0   16.32 14.94     ~ 5 0
21 Cl* Hogg 15 M 19 * 12 43 43.87 -63 06 19.7   15.55 14.70     ~ 5 0
22 Cl* Hogg 15 M 17 * 12 43 44.8238901504 -63 07 10.268084424   15.43 14.73     ~ 4 0
23 Cl* Hogg 15 M 20 * 12 43 45.40 -63 05 54.8   15.64 14.77     ~ 5 0
24 Cl* Hogg 15 M 18 * 12 43 47.9891704416 -63 07 03.273154464   16.66 14.77     ~ 4 0
25 HD 311884 WR* 12 43 50.9991209208 -63 05 14.812489320 11.45 11.64 10.81 10.59   WN6+O5V 175 0
26 Cl Hogg 15 4 * 12 43 56.4493523304 -63 04 52.403492244   13.41 12.30     ~ 13 0
27 CD-45 11034 * 16 53 50.9402116848 -45 18 20.137272768 11.7 11.92 11.02 10.86   O8.5 24 0
28 Cl Lynga 14 3 * 16 55 02.8250932392 -45 14 27.851297604   12.88 11.66     ~ 3 0
29 Cl Lynga 14 OpC 16 55 03 -45 14.3           ~ 44 0
30 Cl Lynga 14 7 * 16 55 04 -45 13.7   14.69 13.14     ~ 2 0
31 Cl Lynga 14 15 * 16 55 05.0241342840 -45 14 51.859083084   16.20 14.81     ~ 5 0
32 Cl Lynga 14 9 * 16 55 05.5486320000 -45 14 26.547075852   14.98 13.74     ~ 5 0
33 Cl Lynga 14 6 * 16 55 05.6162831808 -45 13 58.809706032   14.30 13.02 12.76   ~ 4 0
34 Cl Lynga 14 2 * 16 55 05.6776412400 -45 15 10.181697804   13.11 12.00     ~ 3 0
35 Cl Lynga 14 8 * 16 55 06.0406908408 -45 14 29.532596568   12.89 12.14 12.72   ~ 3 0
36 Cl Lynga 14 10 * 16 55 06.5526308928 -45 14 30.744905100   12.87 12.17 13.23   ~ 3 0
37 Cl Lynga 14 1 * 16 55 07.2390215184 -45 15 34.690811364   12.35 11.16     ~ 3 0
38 Cl Lynga 14 11 * 16 55 07.3173200928 -45 14 36.303857988   14.97 13.73 13.43   ~ 5 0
39 Cl Lynga 14 12 * 16 55 07.7560302984 -45 17 32.087122224   15.25 13.07     ~ 2 0
40 Cl Lynga 14 13 * 16 55 08.1156073464 -45 12 24.361712676   14.05 13.12 12.95   ~ 3 0
41 Cl Lynga 14 16 * 16 55 09.4180030488 -45 14 39.564377016   16.55 15.31     ~ 4 0
42 Cl Lynga 14 4 * 16 55 10.3555078152 -45 16 15.319289316   13.31 12.38     ~ 4 0
43 M 16 OpC 18 18 45.1 -13 47 31           ~ 1084 1
44 V* R CrA Ae* 19 01 53.6764322232 -36 57 08.299341828 12.781 12.651 11.917 11.242 10.412 B5IIIpe 499 2
45 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0

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