Improved Constraints on the Disk around MWC 349A from the 23 m LBTI
Eisner, Josh A.
Hinz, P. M.
Sheehan, Patrick D.
Skemer, Andrew J.
Tuthill, P. G.
Young, J. S.
AffiliationUniv Arizona, Astron Dept
MetadataShow full item record
PublisherIOP PUBLISHING LTD
CitationImproved Constraints on the Disk around MWC 349A from the 23 m LBTI 2017, 844 (1):22 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 new spatially resolved observations of MWC 349A from the Large Binocular Telescope Interferometer (LBTI), a 23 m baseline interferometer made up of two, co-mounted 8 m telescopes. MWC 349A is a B[e] star with an unknown evolutionary state. Proposed scenarios range from a young stellar object, to a B[e] supergiant, to a tight binary system. Radio continuum and recombination line observations of this source revealed a sub-arcsecond bipolar outflow surrounding an similar to 100 mas circumstellar disk. Follow-up infrared studies detected the disk, and suggested that it may have skew and an inner clearing. Our new infrared interferometric observations, which have more than twice the resolution of previously published data sets, support the presence of both skew and a compact infrared excess. They rule out inner clearings with radii greater than similar to 14 mas. We show the improvements in disk parameter constraints provided by LBTI, and discuss the inferred disk parameters in the context of the posited evolutionary states for MWC 349A.
VersionFinal published version
SponsorsNSF AAG ; National Science Foundation Graduate Research Fellowship [DGE-1143953]; National Science Foundation