TY - JOUR
T1 - A Deep Polarimetric Study of the Asymmetrical Debris Disk HD 106906
AU - Crotts, Katie A.
AU - Matthews, Brenda C.
AU - Esposito, Thomas M.
AU - Duch ne, Gaspard
AU - Kalas, Paul
AU - Chen, Christine H.
AU - Arriaga, Pauline
AU - Millar-Blanchaer, Maxwell A.
AU - Debes, John H.
AU - Draper, Zachary H.
AU - Fitzgerald, Michael P.
AU - Hom, Justin
AU - Macgregor, Meredith A.
AU - Mazoyer, Johan
AU - Patience, Jennifer
AU - Rice, Malena
AU - Weinberger, Alycia J.
AU - Wilner, David J.
AU - Wolff, Schuyler
N1 - Funding Information:
The authors wish to thank the anonymous referee for helpful suggestions that improved this manuscript. This work is based on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc. (AURA), under a cooperative agreement with the National Science Foundation (NSF) on behalf of the Gemini partnership: the NSF (United States), the National Research Council (Canada), CONICYT (Chile), Ministerio de Ciencia, Tecnologia e Innovacion Productiva (Argentina), and Ministerio da Ciencia, Tecnologia e Inovacao (Brazil). This workmade use of data from the European Space Agency mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC; https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This research made use of the SIMBAD and VizieR databases, operated at CDS, Strasbourg, France. We are thankful for support from NSF AST-1518332, NASA NNX15AC89G, and NNX15AD95G/NEXSS. This work benefited from NASA's Nexus for Exoplanet System Science (NExSS) research coordination network sponsored by NASA's Science Mission Directorate. K.C. is supported by an NSERC Discovery Grant to B.C.M.
Publisher Copyright:
© 2021. The American Astronomical Society. All rights reserved.
PY - 2021/7/1
Y1 - 2021/7/1
N2 - Located in the Lower Centaurus Crux group, HD 106906 is a young, binary stellar system. This system is unique among discovered systems in that it contains an asymmetrical debris disk, as well as an 11 M Jup planet companion, at a separation of ∼735 au. Only a handful of other systems are known to contain both a disk and a directly imaged planet, where HD 106906 is the only one in which the planet has apparently been scattered. The debris disk is nearly edge-on and extends to roughly >500 au, where previous studies with the Hubble Space Telescope have shown the outer regions to have high asymmetry. To better understand the structure and composition of the disk, we have performed a deep polarimetric study of HD 106906's asymmetrical debris disk using newly obtained H-, J-, and K1-band polarimetric data from the Gemini Planet Imager. An empirical analysis of our data supports a disk that is asymmetrical in surface brightness and structure, where fitting an inclined ring model to the disk spine suggests that the disk may be highly eccentric (e ⪆ 0.16). A comparison of the disk flux with the stellar flux in each band suggests a blue color that also does not significantly vary across the disk. We discuss these results in terms of possible sources of asymmetry, where we find that dynamical interaction with the planet companion, HD 106906b, is a likely candidate.
AB - Located in the Lower Centaurus Crux group, HD 106906 is a young, binary stellar system. This system is unique among discovered systems in that it contains an asymmetrical debris disk, as well as an 11 M Jup planet companion, at a separation of ∼735 au. Only a handful of other systems are known to contain both a disk and a directly imaged planet, where HD 106906 is the only one in which the planet has apparently been scattered. The debris disk is nearly edge-on and extends to roughly >500 au, where previous studies with the Hubble Space Telescope have shown the outer regions to have high asymmetry. To better understand the structure and composition of the disk, we have performed a deep polarimetric study of HD 106906's asymmetrical debris disk using newly obtained H-, J-, and K1-band polarimetric data from the Gemini Planet Imager. An empirical analysis of our data supports a disk that is asymmetrical in surface brightness and structure, where fitting an inclined ring model to the disk spine suggests that the disk may be highly eccentric (e ⪆ 0.16). A comparison of the disk flux with the stellar flux in each band suggests a blue color that also does not significantly vary across the disk. We discuss these results in terms of possible sources of asymmetry, where we find that dynamical interaction with the planet companion, HD 106906b, is a likely candidate.
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U2 - 10.3847/1538-4357/abff5c
DO - 10.3847/1538-4357/abff5c
M3 - Article
AN - SCOPUS:85109957404
SN - 0004-637X
VL - 915
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 58
ER -