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dc.contributor.authorBalog, Zoltan
dc.contributor.authorSiegler, Nick
dc.contributor.authorRieke, George H.
dc.contributor.authorKiss, L. L.
dc.contributor.authorMuzerolle, James
dc.contributor.authorGutermuth, Robert A.
dc.contributor.authorBell, Cameron P. M.
dc.contributor.authorVinkó, J.
dc.contributor.authorSu, Kate Y. L.
dc.contributor.authorYoung, E. T.
dc.contributor.authorGáspár, András
dc.date.accessioned2017-02-07T00:56:33Z
dc.date.available2017-02-07T00:56:33Z
dc.date.issued2016-11-18
dc.identifier.citationPROTOPLANETARY AND TRANSITIONAL DISKS IN THE OPEN STELLAR CLUSTER IC 2395 2016, 832 (1):87 The Astrophysical Journalen
dc.identifier.issn1538-4357
dc.identifier.doi10.3847/0004-637X/832/1/87
dc.identifier.urihttp://hdl.handle.net/10150/622451
dc.description.abstractWe present new deep UBVRI images and high-resolution multi-object optical spectroscopy of the young (similar to 6-10 Myr old), relatively nearby (800 pc) open cluster IC 2395. We identify nearly 300 cluster members and use the photometry to estimate their spectral types, which extend from early B to middle M. We also present an infrared imaging survey of the central region using the IRAC and MIPS instruments on board the Spitzer Space Telescope, covering the wavelength range from 3.6 to 24 mu m. Our infrared observations allow us to detect dust in circumstellar disks originating over a typical range of radii from similar to 0.1 to similar to 10 au from the central star. We identify 18 Class II, 8 transitional disk, and 23 debris disk candidates, respectively, 6.5%, 2.9%, and 8.3% of the cluster members with appropriate data. We apply the same criteria for transitional disk identification to 19 other stellar clusters and associations spanning ages from similar to 1 to similar to 18 Myr. We find that the number of disks in the transitional phase as a fraction of the total with strong 24 mu m excesses ([8] - [24]. 1.5) increases from (8.4. +/- 1.3)% at similar to 3 Myr to (46. +/- 5)% at similar to 10 Myr. Alternative definitions of transitional disks will yield different percentages but should show the same trend.
dc.description.sponsorshipNASA [1255094]; Lendulet Young Researchers Program of the Hungarian Academy of Sciences; National Aeronautics and Space Administration; National Science Foundationen
dc.language.isoenen
dc.publisherIOP PUBLISHING LTDen
dc.relation.urlhttp://stacks.iop.org/0004-637X/832/i=1/a=87?key=crossref.9b8ca322718816b0cfe7951f23b999c2en
dc.rights© 2016. The American Astronomical Society. All rights reserved.en
dc.subjectcircumstellar matteren
dc.subjectinfrared: starsen
dc.subjectopen clusters and associations: individual (IC 2395)en
dc.subjectstars: premain sequenceen
dc.titlePROTOPLANETARY AND TRANSITIONAL DISKS IN THE OPEN STELLAR CLUSTER IC 2395en
dc.typeArticleen
dc.contributor.departmentUniv Arizona, Steward Observen
dc.identifier.journalThe Astrophysical Journalen
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en
dc.eprint.versionFinal published versionen
refterms.dateFOA2018-06-06T08:12:40Z
html.description.abstractWe present new deep UBVRI images and high-resolution multi-object optical spectroscopy of the young (similar to 6-10 Myr old), relatively nearby (800 pc) open cluster IC 2395. We identify nearly 300 cluster members and use the photometry to estimate their spectral types, which extend from early B to middle M. We also present an infrared imaging survey of the central region using the IRAC and MIPS instruments on board the Spitzer Space Telescope, covering the wavelength range from 3.6 to 24 mu m. Our infrared observations allow us to detect dust in circumstellar disks originating over a typical range of radii from similar to 0.1 to similar to 10 au from the central star. We identify 18 Class II, 8 transitional disk, and 23 debris disk candidates, respectively, 6.5%, 2.9%, and 8.3% of the cluster members with appropriate data. We apply the same criteria for transitional disk identification to 19 other stellar clusters and associations spanning ages from similar to 1 to similar to 18 Myr. We find that the number of disks in the transitional phase as a fraction of the total with strong 24 mu m excesses ([8] - [24]. 1.5) increases from (8.4. +/- 1.3)% at similar to 3 Myr to (46. +/- 5)% at similar to 10 Myr. Alternative definitions of transitional disks will yield different percentages but should show the same trend.


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