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dc.contributor.authorSpalding, E.
dc.contributor.authorMorzinski, K.M.
dc.contributor.authorHinz, P.
dc.contributor.authorMales, J.
dc.contributor.authorMeyer, M.
dc.contributor.authorQuanz, S.P.
dc.contributor.authorLeisenring, J.
dc.contributor.authorPower, J.
dc.date.accessioned2022-03-17T01:56:43Z
dc.date.available2022-03-17T01:56:43Z
dc.date.issued2022
dc.identifier.citationSpalding, E., Morzinski, K. M., Hinz, P., Males, J., Meyer, M., Quanz, S. P., Leisenring, J., & Power, J. (2022). High-contrast Imaging with Fizeau Interferometry: The Case of Altair. Astronomical Journal.
dc.identifier.issn0004-6256
dc.identifier.doi10.3847/1538-3881/ac3b5b
dc.identifier.urihttp://hdl.handle.net/10150/663553
dc.description.abstractThe Large Binocular Telescope (LBT) has two 8.4 m primary mirrors that produce beams that can be combined coherently in a "Fizeau"interferometric mode. In principle, the Fizeau point-spread function (PSF) enables the probing of structure at a resolution up to three times better than that of the adaptive-optics-corrected PSF of a single 8.4 m telescope. In this work, we examined the nearby star Altair (5.13 pc, type A7V, hundreds of Myr to ≈1.4 Gyr) in the Fizeau mode with the LBT at Brα (4.05 μm) and carried out angular differential imaging to search for companions. This work presents the first filled-aperture LBT Fizeau science data set to benefit from a correcting mirror that provides active phase control. In the analysis of the λ/D angular regime, the sensitivity of the data set is down to ≈0.5 M o˙ at 1″ for a 1.0 Gyr system. This sensitivity remains limited by the small amount of integration time, which is in turn limited by the instability of the Fizeau PSF. However, in the Fizeau fringe regime we attain sensitivities of Δm ≈ 5 at 0.″2 and put constraints on companions of 1.3 M o˙ down to an inner angle of ≈0.″15, closer than any previously published direct imaging of Altair. This analysis is a pathfinder for future data sets of this type, and represents some of the first steps to unlocking the potential of the first Extremely Large Telescope. Fizeau observations will be able to reach dimmer targets with upgrades to the instrument, in particular the phase detector. © 2022. The Author(s). Published by the American Astronomical Society..
dc.language.isoen
dc.publisherAmerican Astronomical Society
dc.rightsCopyright © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleHigh-contrast Imaging with Fizeau Interferometry: The Case of Altair
dc.typeArticle
dc.typetext
dc.contributor.departmentSteward Observatory, University of Arizona
dc.contributor.departmentCenter for Astronomical Adaptive Optics, University of Arizona
dc.identifier.journalAstronomical Journal
dc.description.noteOpen access article
dc.description.collectioninformationThis 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 repository@u.library.arizona.edu.
dc.eprint.versionFinal published version
dc.source.journaltitleAstronomical Journal
refterms.dateFOA2022-03-17T01:56:43Z


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Copyright © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.
Except where otherwise noted, this item's license is described as Copyright © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.