AuthorMacGregor, Meredith A.
Kennedy, Grant M.
Wyatt, Mark C.
Hughes, A. Meredith
Rieke, George H.
Fitzgerald, Michael P.
Graham, James R.
Holland, Wayne S.
Su, Kate Y. L.
AffiliationUniv Arizona, Steward Observ
MetadataShow full item record
PublisherIOP PUBLISHING LTD
CitationA Complete ALMA Map of the Fomalhaut Debris Disk 2017, 842 (1):8 The Astrophysical Journal
JournalThe Astrophysical Journal
Rights© 2017. The American Astronomical Society. All rights reserved.
Collection InformationThis 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 email@example.com.
AbstractWe present ALMA mosaic observations at 1.3. mm (223 GHz) of the Fomalhaut system with a sensitivity of 14 mu Jy/beam. These observations provide the first millimeter map of the continuum dust emission from the complete outer debris disk with uniform sensitivity, enabling the first conclusive detection of apocenter glow. We adopt an MCMC modeling approach that accounts for the eccentric orbital parameters of a collection of particles within the disk. The outer belt is radially confined with an inner edge of 136.3 +/- 0.9. au and width of 13.5 +/- 1.8. au. We determine a best-fit eccentricity of 0.12 +/- 0.01. Assuming a size distribution power-law index of q. =. 3.46 +/- 0.09, we constrain the dust absorptivity power-law index a to be 0.9
VersionFinal published version
SponsorsNational Science Foundation Graduate Research Fellowship [DGE1144152]; NRAO Student Observing Support; STFC; European Union through ERC ; NASA [NNX15AC89G, NNX15AD95G/NEXSS, NNX15AK23G, NNX15AM35G]; NSF [AST-1518332, HST-GO-13726, AST-1412647]; NASA's Science Mission Directorate; Royal Society as a Royal Society University Research Fellow; Royal Society Dorothy Hodgkin Fellowship; Center for Exoplanets and Habitable Worlds; Pennsylvania State University; Eberly College of Science; Pennsylvania Space Grant Consortium