Detection of sharp symmetric features in the circumbinary disk around Ak Sco
Author
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Janson, Markus
Author
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Thalmann, Christian
Author
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Boccaletti, Anthony
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Maire, Anne-Lise
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Zurlo, Alice
Author
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Marzari, Francesco
Author
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Meyer, Michael R.
Author
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Carson, Joseph C.
Author
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Augereau, Jean-Charles
Author
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Garufi, Antonio
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Henning, Thomas
Author
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Desidera, Silvano
Author
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Asensio-Torres, Rubén
Author
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Pohl, Adriana
Admission date
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2016-05-26T16:34:34Z
Available date
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2016-05-26T16:34:34Z
Publication date
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2016
Cita de ítem
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The Astrophysical Journal Letters, 816:L1 (5pp), 2016 January 1
en_US
Identifier
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DOI: 10.3847/2041-8205/816/1/L1
Identifier
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https://repositorio.uchile.cl/handle/2250/138512
General note
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Artículo de publicación ISI
en_US
Abstract
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The Search for Planets Orbiting Two Stars survey aims to study the formation and distribution of planets in binary systems by detecting and characterizing circumbinary planets and their formation environments through direct imaging. With the SPHERE Extreme Adaptive Optics instrument, a good contrast can be achieved even at small (< 300 mas) separations from bright stars, which enables studies of planets and disks in a separation range that was previously inaccessible. Here, we report the discovery of resolved scattered light emission from the circumbinary disk around the well-studied young double star AK. Sco, at projected separations in the similar to 13-40 AU range. The sharp morphology of the imaged feature is surprising, given the smooth appearance of the disk in its spectral energy distribution. We show that the observed morphology can be represented either as a highly eccentric ring around AK Sco, or as two separate spiral arms in the disk, wound in opposite directions. The relative merits of these interpretations are discussed, as well as whether these features may have been caused by one or several circumbinary planets interacting with the disk.
en_US
Patrocinador
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NSF
1009203
Chilean Ministry of Economy
Nucleus RC130007