A likely close-in low-mass stellar companion to the transitional disk star HD142527
Entity
UAM. Departamento de Física TeóricaPublisher
The American Astronomical SocietyDate
2012-07-10Citation
10.1088/2041-8205/753/2/L38
The Astrophysical Journal Letters 753.2 (2012): L38
ISSN
2041-8205 (print); 2041-8213 (online)DOI
10.1088/2041-8205/753/2/L38Editor's Version
http://dx.doi.org/10.1088/2041-8205/753/2/L38Subjects
Brown dwarfs; Circumstellar matter; Planetary systems; Stars: emission-line, Be; Stars: low-mass; FísicaNote
The Astrophysical Journal Letters 753.2 (2012): L38 reproduced by permission of the AASRights
© 2012. The American Astronomical SocietyAbstract
With the uniquely high contrast within 0''.1 (Δmag(L′) = 5-6.5 mag) available using Sparse Aperture Masking with NACO at Very Large Telescope, we detected asymmetry in the flux from the Herbig Fe star HD 142527 with a barycenter emission situated at a projected separation of 88 ± 5 mas (12.8 ± 1.5 AU at 145pc) and flux ratios in H, K, and L′ of 0.016 ± 0.007, 0.012 ± 0.008, and 0.0086 ± 0.0011, respectively (3σ errors), relative to the primary star and disk. After extensive closure-phase modeling, we interpret this detection as a close-in, low-mass stellar companion with an estimated mass of ∼0.1-0.4 M⊙. HD 142527 has a complex disk structure, with an inner gap imaged in both the near and mid-IR as well as a spiral feature in the outer disk in the near-IR. This newly detected low-mass stellar companion may provide a critical explanation of the observed disk structure.
Files in this item
Google Scholar:Biller, Beth
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Lacour, Sylvestre
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Juhász, Attila
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Benisty, Myriam
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Chauvin, Gaël
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Olofsson, Johan
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Pott, Jörg Uwe
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Müller, André
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Sicilia-Aguilar, Aurora
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Bonnefoy, Mickaël
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Tuthill, Peter
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Thébault, Philippe
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Crida, Aurélien
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Heninng, Thomas
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