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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Guardado en:
Detalles Bibliográficos
Publicado: 1992
Materias:
Dust, extinction
Globular clusters: individual (NGC 6624)
Polarization
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v388_n2_p383_Forte
http://hdl.handle.net/20.500.12110/paper_0004637X_v388_n2_p383_Forte
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0004637X_v388_n2_p383_Forte
record_format dspace
spelling paper:paper_0004637X_v388_n2_p383_Forte2023-06-08T14:28:31Z Dust within globular clusters: A large bubble in NGC 6624? 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. 1992 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v388_n2_p383_Forte 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
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.
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?
publishDate 1992
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v388_n2_p383_Forte
http://hdl.handle.net/20.500.12110/paper_0004637X_v388_n2_p383_Forte
_version_ 1768542060765249536

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