The Big Sibling of AU Mic: A Cold Dust-rich Debris Disk around CP-72 2713 in the beta Pic Moving Group

0539660 - ASÚ 2021 RIV US eng J - Článek v odborném periodiku
Moór, A. … celkem 11 autorů
The Big Sibling of AU Mic: A Cold Dust-rich Debris Disk around CP-72 2713 in the beta Pic Moving Group.
Astronomical Journal. Roč. 159, č. 6 (2020), č. článku 288. ISSN 0004-6256. E-ISSN 1538-3881
Výzkumná infrastruktura: EU-ARC.CZ II - 90106
Klíčová slova: circumstellar disks * debris disks * late-type dwarf stars
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 6.281, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.3847/1538-3881/ab8f98

Analyzing Spitzer and Herschel archival measurements we identified a debris disk around the young K7/M0 star CP-72 2713. The system belongs to the 24 Myr old beta Pic moving group. Our new 1.33 mm continuum observation, obtained with the Atacama Large Millimeter/submillimeter Array 7 m array, revealed an extended dust disk with a peak radius of 140 au, probably tracing the location of the planetesimal belt in the system. The disk is outstandingly large compared to known spatially resolved debris disks and 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 43 K and a fractional luminosity of 1.1 x 10(-3). The latter value is prominently high, we know of only four other similarly dust-rich Kuiper Belt analogs within 40 pc of the Sun.
Trvalý link: http://hdl.handle.net/11104/0317369