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dc.contributor.authorHoq, Sadiaen_US
dc.contributor.authorClemens, D. P.en_US
dc.date.accessioned2018-02-20T19:10:47Z
dc.date.available2018-02-20T19:10:47Z
dc.date.issued2015-10-01
dc.identifier.citationSadia Hoq, D. P. Clemens. 2015. "OPEN CLUSTERS AS PROBES OF THE GALACTIC MAGNETIC FIELD. I. CLUSTER PROPERTIES." The Astronomical Journal, Volume 150, Issue 4, pp. 135 - 135.
dc.identifier.issn1538-3881
dc.identifier.urihttps://hdl.handle.net/2144/27098
dc.description.abstractStars in open clusters are powerful probes of the intervening Galactic magnetic field via background starlight polarimetry because they provide constraints on the magnetic field distances. We use 2MASS photometric data for a sample of 31 clusters in the outer Galaxy for which near-IR polarimetric data were obtained to determine the cluster distances, ages, and reddenings via fitting theoretical isochrones to cluster color–magnitude diagrams. The fitting approach uses an objective χ2 minimization technique to derive the cluster properties and their uncertainties. We found the ages, distances, and reddenings for 24 of the clusters, and the distances and reddenings for 6 additional clusters that were either sparse or faint in the near-IR. The derived ranges of log(age), distance, and E(B−V) were 7.25–9.63, ~670–6160 pc, and 0.02–1.46 mag, respectively. The distance uncertainties ranged from ~8% to 20%. The derived parameters were compared to previous studies, and most cluster parameters agree within our uncertainties. To test the accuracy of the fitting technique, synthetic clusters with 50, 100, or 200 cluster members and a wide range of ages were fit. These tests recovered the input parameters within their uncertainties for more than 90% of the individual synthetic cluster parameters. These results indicate that the fitting technique likely provides reliable estimates of cluster properties. The distances derived will be used in an upcoming study of the Galactic magnetic field in the outer Galaxy.en_US
dc.format.extent135 - 135en_US
dc.relation.ispartofThe Astronomical Journal
dc.rights© 2015. The American Astronomical Society. All rights reserved.en_US
dc.subjectAstronomical and space sciencesen_US
dc.subjectAstronomy & astrophysicsen_US
dc.subjectISM: magnetic fieldsen_US
dc.subjectMethods: numericalen_US
dc.subjectOpen clusters and associationsen_US
dc.subjectPolarizationen_US
dc.subjectMagnetic fieldsen_US
dc.subjectSurveysen_US
dc.titleOpen clusters as probes of the galactic magnetic field. I. Cluster propertiesen_US
dc.typeArticleen_US
dc.identifier.doi10.1088/0004-6256/150/4/135
pubs.elements-sourcecrossrefen_US
pubs.notesEmbargo: No embargoen_US
pubs.organisational-groupBoston Universityen_US
pubs.organisational-groupBoston University, College of Arts & Sciencesen_US
pubs.organisational-groupBoston University, College of Arts & Sciences, Department of Astronomyen_US
pubs.publication-statusPublisheden_US
dc.date.online2015-10-06
dc.identifier.orcid0000-0002-9947-4956 (Clemens, D. P.)


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