Improved Constraints on the Disk around MWC 349A from the 23 m LBTI
We 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 obj...
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ndltd-arizona.edu-oai-arizona.openrepository.com-10150-6251652017-08-11T03:00:41Z Improved Constraints on the Disk around MWC 349A from the 23 m LBTI Sallum, S. Eisner, J. A. Hinz, P. M. Sheehan, P. D. Skemer, A. J. Tuthill, P. G. Young, J. S. Univ Arizona, Astron Dept circumstellar matter stars: individual (MWC 349A) techniques: interferometric We 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. 2017-07-18 Article Improved Constraints on the Disk around MWC 349A from the 23 m LBTI 2017, 844 (1):22 The Astrophysical Journal 1538-4357 10.3847/1538-4357/aa7855 http://hdl.handle.net/10150/625165 http://arizona.openrepository.com/arizona/handle/10150/625165 The Astrophysical Journal en http://stacks.iop.org/0004-637X/844/i=1/a=22?key=crossref.7c82694736e56115667d8fa70a5394a0 © 2017. The American Astronomical Society. All rights reserved. IOP PUBLISHING LTD |
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en |
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circumstellar matter stars: individual (MWC 349A) techniques: interferometric |
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circumstellar matter stars: individual (MWC 349A) techniques: interferometric Sallum, S. Eisner, J. A. Hinz, P. M. Sheehan, P. D. Skemer, A. J. Tuthill, P. G. Young, J. S. Improved Constraints on the Disk around MWC 349A from the 23 m LBTI |
description |
We 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. |
author2 |
Univ Arizona, Astron Dept |
author_facet |
Univ Arizona, Astron Dept Sallum, S. Eisner, J. A. Hinz, P. M. Sheehan, P. D. Skemer, A. J. Tuthill, P. G. Young, J. S. |
author |
Sallum, S. Eisner, J. A. Hinz, P. M. Sheehan, P. D. Skemer, A. J. Tuthill, P. G. Young, J. S. |
author_sort |
Sallum, S. |
title |
Improved Constraints on the Disk around MWC 349A from the 23 m LBTI |
title_short |
Improved Constraints on the Disk around MWC 349A from the 23 m LBTI |
title_full |
Improved Constraints on the Disk around MWC 349A from the 23 m LBTI |
title_fullStr |
Improved Constraints on the Disk around MWC 349A from the 23 m LBTI |
title_full_unstemmed |
Improved Constraints on the Disk around MWC 349A from the 23 m LBTI |
title_sort |
improved constraints on the disk around mwc 349a from the 23 m lbti |
publisher |
IOP PUBLISHING LTD |
publishDate |
2017 |
url |
http://hdl.handle.net/10150/625165 http://arizona.openrepository.com/arizona/handle/10150/625165 |
work_keys_str_mv |
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1718514903699947520 |