Polarimetry of the highly reddened open clusters Hogg 15 and Lyngå 14
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...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00046256_v116_n1_p266_Orsatti |
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todo:paper_00046256_v116_n1_p266_Orsatti2023-10-03T13:59:34Z Polarimetry of the highly reddened open clusters Hogg 15 and Lyngå 14 Orsatti, A.M. Vega, E. Marraco, H.G. Dust, extinction Open clusters and associations: individual (Hogg 15, lyngå 14) 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. Results 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00046256_v116_n1_p266_Orsatti |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Dust, extinction Open clusters and associations: individual (Hogg 15, lyngå 14) |
| spellingShingle |
Dust, extinction Open clusters and associations: individual (Hogg 15, lyngå 14) Orsatti, A.M. Vega, E. Marraco, H.G. Polarimetry of the highly reddened open clusters Hogg 15 and Lyngå 14 |
| topic_facet |
Dust, extinction Open clusters and associations: individual (Hogg 15, lyngå 14) |
| description |
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. Results 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. |
| format |
JOUR |
| author |
Orsatti, A.M. Vega, E. Marraco, H.G. |
| author_facet |
Orsatti, A.M. Vega, E. Marraco, H.G. |
| author_sort |
Orsatti, A.M. |
| title |
Polarimetry of the highly reddened open clusters Hogg 15 and Lyngå 14 |
| title_short |
Polarimetry of the highly reddened open clusters Hogg 15 and Lyngå 14 |
| title_full |
Polarimetry of the highly reddened open clusters Hogg 15 and Lyngå 14 |
| title_fullStr |
Polarimetry of the highly reddened open clusters Hogg 15 and Lyngå 14 |
| title_full_unstemmed |
Polarimetry of the highly reddened open clusters Hogg 15 and Lyngå 14 |
| title_sort |
polarimetry of the highly reddened open clusters hogg 15 and lyngå 14 |
| url |
http://hdl.handle.net/20.500.12110/paper_00046256_v116_n1_p266_Orsatti |
| work_keys_str_mv |
AT orsattiam polarimetryofthehighlyreddenedopenclustershogg15andlynga14 AT vegae polarimetryofthehighlyreddenedopenclustershogg15andlynga14 AT marracohg polarimetryofthehighlyreddenedopenclustershogg15andlynga14 |
| _version_ |
1807323989216854016 |