Dust within globular clusters: A large bubble in NGC 6624?
An analysis of dark patches, based on multicolor CCD frames, and polarimetry of stars in the field of the globular cluster NGC 6624 are presented. The apparent extinctions in a number of dark patches reveal a nongray behavior with wavelength. The fitting of a given extinction law indicates minimum i...
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_0004637X_v388_n2_p383_Forte |
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todo:paper_0004637X_v388_n2_p383_Forte2023-10-03T14:01:34Z Dust within globular clusters: A large bubble in NGC 6624? Forte, J.C. Cellone, S.A. Méndez, M. Vega, E.I. Dust, extinction Globular clusters: individual (NGC 6624) Polarization An analysis of dark patches, based on multicolor CCD frames, and polarimetry of stars in the field of the globular cluster NGC 6624 are presented. The apparent extinctions in a number of dark patches reveal a nongray behavior with wavelength. The fitting of a given extinction law indicates minimum intrinsic visual extinctions ranging from 0.20 to 0.30 mag. These results are consistent with photometric measurements made in annular segments and with differential reddening effects in the C-M diagram, suggesting the existence of a large-scale dust feature associated with the cluster. The overall appearance of the distribution of the dark patches is reminiscent of a bubble-like geometry not centered at the cluster nucleus and with a 50″ radius. The apparent center of this structure is located at some 9″ from the position of the X-ray burster 1820-30. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0004637X_v388_n2_p383_Forte |
| 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 Globular clusters: individual (NGC 6624) Polarization |
| spellingShingle |
Dust, extinction Globular clusters: individual (NGC 6624) Polarization Forte, J.C. Cellone, S.A. Méndez, M. Vega, E.I. Dust within globular clusters: A large bubble in NGC 6624? |
| topic_facet |
Dust, extinction Globular clusters: individual (NGC 6624) Polarization |
| description |
An analysis of dark patches, based on multicolor CCD frames, and polarimetry of stars in the field of the globular cluster NGC 6624 are presented. The apparent extinctions in a number of dark patches reveal a nongray behavior with wavelength. The fitting of a given extinction law indicates minimum intrinsic visual extinctions ranging from 0.20 to 0.30 mag. These results are consistent with photometric measurements made in annular segments and with differential reddening effects in the C-M diagram, suggesting the existence of a large-scale dust feature associated with the cluster. The overall appearance of the distribution of the dark patches is reminiscent of a bubble-like geometry not centered at the cluster nucleus and with a 50″ radius. The apparent center of this structure is located at some 9″ from the position of the X-ray burster 1820-30. |
| format |
JOUR |
| author |
Forte, J.C. Cellone, S.A. Méndez, M. Vega, E.I. |
| author_facet |
Forte, J.C. Cellone, S.A. Méndez, M. Vega, E.I. |
| author_sort |
Forte, J.C. |
| title |
Dust within globular clusters: A large bubble in NGC 6624? |
| title_short |
Dust within globular clusters: A large bubble in NGC 6624? |
| title_full |
Dust within globular clusters: A large bubble in NGC 6624? |
| title_fullStr |
Dust within globular clusters: A large bubble in NGC 6624? |
| title_full_unstemmed |
Dust within globular clusters: A large bubble in NGC 6624? |
| title_sort |
dust within globular clusters: a large bubble in ngc 6624? |
| url |
http://hdl.handle.net/20.500.12110/paper_0004637X_v388_n2_p383_Forte |
| work_keys_str_mv |
AT fortejc dustwithinglobularclustersalargebubbleinngc6624 AT cellonesa dustwithinglobularclustersalargebubbleinngc6624 AT mendezm dustwithinglobularclustersalargebubbleinngc6624 AT vegaei dustwithinglobularclustersalargebubbleinngc6624 |
| _version_ |
1807324281376342016 |