Testing the Interaction Between a Substellar Companion and a Debris Disk in the Hr 2562 System

Authors

• Stella Yimiao Zhang, Center for Astrophysics & Space Sciences
• Gaspard Duchêne, University of California, Berkeley
• Robert J. De Rosa, European Southern Observatory Santiago
• Megan Ansdell, National Aeronautics and Space Administration
• Quinn Konopacky, Center for Astrophysics & Space Sciences
• Thomas Esposito, University of California, Berkeley
• Eugene Chiang, University of California, Berkeley
• Malena Rice, Yale University
• Brenda Matthews, National Research Council Canada
• Paul Kalas, University of California, Berkeley
• Bruce Macintosh, Kavli Institute for Particle Astrophysics and Cosmology
• Franck Marchis, SETI Institute
• Stan Metchev, Western University
• Jenny Patience, School of Earth and Space Exploration
• Julien Rameau, Institut de Planétologie et d’Astrophysique de Grenoble (IPAG)
• Kimberly Ward-Duong, Smith CollegeFollow
• Schuyler Wolff, The University of Arizona
• Michael P. Fitzgerald, University of California, Los Angeles
• Vanessa P. Bailey, California Institute of Technology
• Travis S. Barman, The University of Arizona
• Joanna Bulger, University Hawaii Institute for Astronomy
• Christine H. Chen, Space Telescope Science Institute
• Jeffrey K. Chilcotte, University of Notre Dame
• Tara Cotten, University of Georgia
• René Doyon, Institut de Recherche sur les Exoplanètes
• Katherine B. Follette, Amherst College
• Benjamin L. Gerard, University of Victoria
• Stephen Goodsell, Durham University
• James R. Graham, University of California, Berkeley
• Alexandra Z. Greenbaum, Infrared Processing & Analysis Center
• Pascale Hibon, European Southern Observatory Santiago
• Li Wei Hung, US National Park Service

Document Type

Article

Publication Date

5-1-2023

Publication Title

Astronomical Journal

Abstract

The HR 2562 system is a rare case where a brown dwarf companion resides in a cleared inner hole of a debris disk, offering invaluable opportunities to study the dynamical interaction between a substellar companion and a dusty disk. We present the first ALMA observation of the system as well as the continued Gemini Planet Imager monitoring of the companion's orbit with six new epochs from 2016 to 2018. We update the orbital fit, and in combination with absolute astrometry from GAIA, place a 3σ upper limit of 18.5 M J on the companion's mass. To interpret the ALMA observations, we used radiative transfer modeling to determine the disk properties. We find that the disk is well resolved and nearly edge-on. While the misalignment angle between the disk and the orbit is weakly constrained, due to the short orbital arc available, the data strongly support a (near) coplanar geometry for the system. Furthermore, we find that the models that describe the ALMA data best have inner radii that are close to the companion's semimajor axis. Including a posteriori knowledge of the system's SED further narrows the constraints on the disk's inner radius and places it at a location that is in reasonable agreement with (possibly interior to) predictions from existing dynamical models of disk truncation by an interior substellar companion. HR 2562 has the potential over the next few years to become a new test bed for dynamical interaction between a debris disk and a substellar companion.

Volume

165

Issue

5

DOI

https://doi.org/10.3847/1538-3881/acbafb

ISSN

00046256

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Rights

© 2023. The Author(s).

Version

Version of Record

Recommended Citation

Zhang, Stella Yimiao; Duchêne, Gaspard; De Rosa, Robert J.; Ansdell, Megan; Konopacky, Quinn; Esposito, Thomas; Chiang, Eugene; Rice, Malena; Matthews, Brenda; Kalas, Paul; Macintosh, Bruce; Marchis, Franck; Metchev, Stan; Patience, Jenny; Rameau, Julien; Ward-Duong, Kimberly; Wolff, Schuyler; Fitzgerald, Michael P.; Bailey, Vanessa P.; Barman, Travis S.; Bulger, Joanna; Chen, Christine H.; Chilcotte, Jeffrey K.; Cotten, Tara; Doyon, René; Follette, Katherine B.; Gerard, Benjamin L.; Goodsell, Stephen; Graham, James R.; Greenbaum, Alexandra Z.; Hibon, Pascale; and Hung, Li Wei, "Testing the Interaction Between a Substellar Companion and a Debris Disk in the Hr 2562 System" (2023). Astronomy: Faculty Publications, Smith College, Northampton, MA.
https://scholarworks.smith.edu/ast_facpubs/87