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American Astronomical Society, Astrophysical Journal Letters, 1(792), p. L22, 2014

DOI: 10.1088/2041-8205/792/1/l22

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An Enigmatic Point-Like Feature Within the Hd 169142 Transitional Disk,

Journal article published in 2014 by Beth A. Biller, Jared Males, Timothy Rodigas ORCID, Katie Morzinski ORCID, Laird M. Close, Attila Juhász, Katherine B. Follette, Sylvestre Lacour ORCID, Myriam Benisty ORCID, Aurora Sicilia-Aguilar ORCID, Philip M. Hinz, Alycia Weinberger ORCID, Thomas Henning, Jörg-Uwe Pott ORCID, Mickaël Bonnefoy and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We report the detection of a faint pointlike feature possibly related to ongoing planet-formation in the disk of the transition disk star HD 169142. The pointlike feature has a $Δ$mag(L)$∼$6.4, at a separation of $∼$0.11" and PA$∼$0$^{∘}$. Given its lack of an H or K$_{S}$ counterpart despite its relative brightness, this candidate cannot be explained by purely photospheric emission and must be a disk feature heated by an as yet unknown source. Its extremely red colors make it highly unlikely to be a background object, but future multi-wavelength followup is necessary for confirmation and characterization of this feature. ; Comment: Accepted to ApJ Letters, see also Reggiani et al. 2014