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A Spitzer View of the Young Open Cluster NGC 2264

Sung, Hwankyung; Stauffer, John R.; Bessell, Michael

Description

We have performed mid-IR photometry of the young open cluster NGC 2264 using the images obtained with the Spitzer Space Telescope Infrared Array Camera and Multiband Imaging Photometer for Spitzer instruments and presented a normalized classification scheme of young stellar objects in various color-color diagrams to make full use of the information from multicolor photometry. These results are compared with the classification scheme based on the slope of the spectral energy distribution (SED)....[Show more]

dc.contributor.authorSung, Hwankyung
dc.contributor.authorStauffer, John R.
dc.contributor.authorBessell, Michael
dc.date.accessioned2015-12-07T22:16:55Z
dc.identifier.issn0004-6256
dc.identifier.urihttp://hdl.handle.net/1885/18272
dc.description.abstractWe have performed mid-IR photometry of the young open cluster NGC 2264 using the images obtained with the Spitzer Space Telescope Infrared Array Camera and Multiband Imaging Photometer for Spitzer instruments and presented a normalized classification scheme of young stellar objects in various color-color diagrams to make full use of the information from multicolor photometry. These results are compared with the classification scheme based on the slope of the spectral energy distribution (SED). From the spatial distributions of Class I and II stars, we have identified two subclusterings of Class I objects in the CONE region of Sung etal. The disked stars in the other star-forming region S Mon are mostly Class II objects. These three regions show a distinct difference in the fractional distribution of SED slopes as well as the mean value of SED slopes. The fraction of stars with primordial disks is nearly flat between log m = 0.2 and -0.5 and that of transition disks is very high for solar mass stars. In addition, we have derived a somewhat higher value of the primordial disk fraction for NGC 2264 members located below the main pre-main-sequence locus (so-called BMS stars). This result supports the idea that BMS stars are young stars with nearly edge-on disks. We have also found that the fraction of primordial disks is very low near the most massive star S Mon and increases with distance from S Mon.
dc.publisherUniversity of Chicago Press
dc.sourceAstronomical Journal
dc.subjectKeywords: Formation; Individual (NGC 2264); Open clusters and associations; Planetary systems; Pre-main sequence; Protoplanetary disks; Stars
dc.titleA Spitzer View of the Young Open Cluster NGC 2264
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume138
dc.date.issued2009
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationu3356449xPUB4
local.type.statusPublished Version
local.contributor.affiliationSung, Hwankyung, Sejong University
local.contributor.affiliationStauffer, John R., California Institute of Technology
local.contributor.affiliationBessell, Michael, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.issue4
local.bibliographicCitation.startpage1116
local.bibliographicCitation.lastpage1136
local.identifier.doi10.1088/0004-6256/138/4/1116
dc.date.updated2016-02-24T09:55:00Z
local.identifier.scopusID2-s2.0-70350596305
local.identifier.thomsonID000269768500010
CollectionsANU Research Publications

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