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The identification of 93 day periodic photometric variability for YSO YLW 16A

Plavchan, P. and Güth, T. and Laohakunakorn, N. and Parks, J. R. (2013) The identification of 93 day periodic photometric variability for YSO YLW 16A. Astronomy and Astrophysics, 554 . Art. No. A110. ISSN 0004-6361. https://resolver.caltech.edu/CaltechAUTHORS:20130809-090739062

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Abstract

Aims. Periodic variability in young stellar objects (YSOs) offers indirect evidence for an active dynamical mechanism. Starspots, accretion, stellar companions, and disk veiling can contribute to the photometric variability of YSOs. Methods. As part of an ongoing study of the ρ Oph star forming region, we report the discovery of 92.6 day periodic variations for the Class I YSO YLW 16A, observed over a period of three years. A SED model was fit to available photometric data for the object. Results. We propose a triple-system with an inner binary with a period of 93 days eclipsed by a warped circum-binary disk. The nature of the secondary is unconstrained and could be stellar or sub-stellar. We confirm the discovery of a tertiary companion at a projected separation of ~40 AU that could account for the circum-binary disk warp. This light curve and model is similar to the model we proposed for WL 4 in previous work. Understanding these systems may lead to insights about the nature of stellar evolution and planetary formation, and provide valuable benchmarks for future theoretical modeling and near- and mid-infrared synoptic surveys of YSOs.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://arxiv.org/abs/1304.2398arXivDiscussion Paper
http://dx.doi.org/10.1051/0004-6361/201220747 DOIArticle
http://www.aanda.org/articles/aa/abs/2013/06/aa20747-12/aa20747-12.htmlPublisherArticle
ORCID:
AuthorORCID
Plavchan, P.0000-0002-8864-1667
Additional Information:© 2013 ESO. Article published by EDP Sciences. Received 16 November 2012; Accepted 4 April 2013. Published online 12 June 2013. The authors would like to thank the anonymous referee for the manuscripts review. We thank Karl Stapelfeldt, John Stauffer, Lynne Hillebrand and Andreas Seifahrt for their critical comments and discussion. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Adminstration under the Exoplanet Exploration Program. This work is based (in part) on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech. This research has made use of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
NASA/JPL/CaltechUNSPECIFIED
Subject Keywords:circumstellar matter – stars: variables: T Tauri, Herbig Ae/Be
Record Number:CaltechAUTHORS:20130809-090739062
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130809-090739062
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39828
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:12 Aug 2013 21:01
Last Modified:03 Oct 2019 05:11

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