Spitzer Space Telescope observations of G dwarfs in the Pleiades: Circumstellar debris disks at 100 Myr age

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dc.contributor.authorStauffer, JR
dc.contributor.authorRebull, LM
dc.contributor.authorCarpenter, J
dc.contributor.authorHillenbrand, L
dc.contributor.authorBackman, D
dc.contributor.authorHines, DC
dc.contributor.authorSoderblom, DR
dc.contributor.authorMamajek, E
dc.contributor.authorMorris, P
dc.contributor.authorBouwman, J
dc.contributor.authorStrom, SE
dc.contributor.otherCalifornia Institute of Technology
dc.contributor.otherNational Aeronautics & Space Administration (NASA)
dc.contributor.otherNASA Ames Research Center
dc.contributor.otherUniversity of Arizona
dc.contributor.otherSpace Telescope Science Institute
dc.contributor.otherMax Planck Society
dc.contributor.otherNational Optical Astronomy Observatory
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2019-06-14T18:36:04Z
dc.date.available2019-06-14T18:36:04Z
dc.date.issued2005-10
dc.description.abstractFluxes and upper limits in the wavelength range from 3.6 to 70 mu m from the Spitzer Space Telescope are provided for 20 solar-mass Pleiades members. One of these stars shows a probable mid-IR excess, and two others have possible excesses, presumably due to circumstellar debris disks. For the star with the largest, most secure excess flux at MIPS (Multiband Imaging Photometer for Spitzer) wavelengths, HII 1101, we derive log (L-dust/L-*) similar to -3.8 and an estimated debris disk mass of 4.2 x 10(-5) M-circle plus for an assumed uniform dust grain size of 10 mu m. If the stars with detected excesses are interpreted as stars with relatively recent, large collisional events producing a transient excess of small dust particles, the frequency of such disk transients is similar to 10% for our similar to 100 Myr, Pleiades G dwarf sample. For the stars without detected 24-70 mu m excesses, the upper limits to their fluxes correspond to approximate 3 sigma upper limits to their disk masses of 6 x 10(-6) M-circle plus using the MIPS 24 mu m upper limit or 2 x 10(-4) M-circle plus using the MIPS 70 mu m limit. These upper limit disk masses (for "warm" and "cold" dust, respectively) are roughly consistent with, but somewhat lower than, predictions of a heuristic model for the evolution of an "average" solar-mass star's debris disk based on extrapolation backward in time from current properties of the Sun's Kuiper Belt.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationStauffer, J., et al. (2005): Spitzer Space Telescope Observations of G Dwarfs in the Pleiades: Circumstellar Debris Disks at 100 Myr Age. The Astronomical Journal, 130(4). DOI: https://doi.org/10.1086/444420
dc.identifier.doi10.1086/444420
dc.identifier.orcidhttps://orcid.org/0000-0001-6381-515X
dc.identifier.orcidhttps://orcid.org/0000-0003-2251-0602
dc.identifier.orcidhttps://orcid.org/0000-0003-4757-2500
dc.identifier.urihttp://ir.ua.edu/handle/123456789/5761
dc.languageEnglish
dc.language.isoen_US
dc.publisherUniversity of Chicago Press
dc.subjectopen clusters and associations : individual (Pleiades)
dc.subjectstars : low-mass, brown dwarfs
dc.subjectLOW-MASS STARS
dc.subjectYOUNG OPEN CLUSTERS
dc.subjectSOLAR-TYPE STARS
dc.subjectT-TAURI STARS
dc.subjectROTATIONAL VELOCITIES
dc.subjectOB ASSOCIATION
dc.subjectLITHIUM DEPLETION
dc.subjectMAIN-SEQUENCE
dc.subjectDUSTY DEBRIS
dc.subjectEVOLUTION
dc.subjectAstronomy & Astrophysics
dc.titleSpitzer Space Telescope observations of G dwarfs in the Pleiades: Circumstellar debris disks at 100 Myr ageen_US
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dc.typeArticle
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