The Big Sibling of AU Mic: A Cold Dust-rich Debris Disk around CP-72 2713 in the β Pic Moving Group
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Authors
Moór, A
Dutrey, A
Folco, ED
Hughes, AM
Kral, Q
Publication Date
2020-06-01Journal Title
Astronomical Journal
ISSN
0004-6256
Publisher
Institute of Physics Publishing
Volume
159
Issue
6
Type
Article
This Version
AM
Metadata
Show full item recordCitation
Moór, A., Pawellek, N., Ábrahám, P., Kóspál, Á., Vida, K., Vida, K., Pál, A., et al. (2020). The Big Sibling of AU Mic: A Cold Dust-rich Debris Disk around CP-72 2713 in the β Pic Moving Group. Astronomical Journal, 159 (6)https://doi.org/10.3847/1538-3881/ab8f98
Abstract
Analyzing Spitzer and Herschel archival measurements we identified a hitherto
unknown debris disk around the young K7/M0 star CP-72 2713. The system belongs
to the 24Myr old $\beta$ Pic moving group. Our new 1.33mm continuum
observation, obtained with the ALMA 7-m array, revealed an extended dust disk
with a peak radius of 140au, probably tracing the location of the planetesimal
belt in the system. The disk is outstandingly large compared to known spatially
resolved debris disks and also to protoplanetary disks around stars of
comparable masses. The dynamical excitation of the belt at this radius is found
to be reconcilable with planetary stirring, while self-stirring by large
planetesimals embedded in the belt can work only if these bodies form very
rapidly, e.g. via pebble concentration. By analyzing the spectral energy
distribution we derived a characteristic dust temperature of 43K and a
fractional luminosity of 1.1$\times$10$^{-3}$. The latter value is prominently
high, we know only four other similarly dust-rich Kuiper-belt analogs within
40pc of the Sun.
Identifiers
External DOI: https://doi.org/10.3847/1538-3881/ab8f98
This record's URL: https://www.repository.cam.ac.uk/handle/1810/305513
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