A SCUBA-2 850-μm survey of protoplanetary discs in the IC 348 cluster
Author
dc.contributor.author
Cieza, L.
Author
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Williams, J.
Author
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Kourkchi, E.
Author
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Andrews, S.
Author
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Casassus Montero, Simón
Author
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Graves, S.
Author
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Schreiber, M.
Admission date
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2015-10-30T15:17:24Z
Available date
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2015-10-30T15:17:24Z
Publication date
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2015
Cita de ítem
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MNRAS 454, 1909–1920 (2015)
en_US
Identifier
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doi:10.1093/mnras/stv2044
Identifier
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https://repositorio.uchile.cl/handle/2250/134780
General note
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Artículo de publicación ISI
en_US
Abstract
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We present 850-µm observations of the 2–3 Myr cluster IC 348 in the Perseus molecular cloud
using the SCUBA-2 camera on the James Clerk Maxwell Telescope. Our SCUBA-2 map has
a diameter of 30 arcmin and contains ∼370 cluster members, including ∼200 objects with IR
excesses. We detect a total of 13 discs. Assuming standard dust properties and a gas-to-dustmass
ratio of 100, we derive disc masses ranging from 1.5 to 16 MJUP. We also detect six Class
0/I protostars. We find that the most massive discs (MD > 3 MJUP; 850-µm flux > 10 mJy)
in IC 348 tend to be transition objects according to the characteristic ‘dip’ in their infrared
spectral energy distributions (SEDs). This trend is also seen in other regions. We speculate that
this could be an initial conditions effect (e.g. more massive discs tend to form giant planets
that result in transition disc SEDs) and/or a disc evolution effect (the formation of one or
more massive planets results in both a transition disc SED and a reduction of the accretion
rate, increasing the lifetime of the outer disc). A stacking analysis of the discs that remain
undetected in our SCUBA-2 observations suggests that their median 850-µm flux should be
1 mJy, corresponding to a disc mass 0.3 MJUP (gas plus dust) or 1 M⊕ of dust. While the
available data are not deep enough to allow a meaningful comparison of the disc luminosity
functions between IC 348 and other young stellar clusters, our results imply that disc masses
exceeding the minimum-mass solar nebula are very rare (1per cent) at the age of IC 348,
especially around very low-mass stars.
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