Direct Imaging of the HD 35841 Debris Disk: a Polarized Dust Ring from Gemini Planet Imager and an Outer Halo From HST/STIS

Authors

• Thomas M. Esposito, University of California, Berkeley
• Gaspard Duchne, University of California, Berkeley
• Paul Kalas, University of California, Berkeley
• Malena Rice, University of California, Berkeley
• Ilodie Choquet, California Institute of Technology
• Bin Ren, Johns Hopkins University
• Marshall D. Perrin, Space Telescope Science Institute
• Christine H. Chen, Space Telescope Science Institute
• Pauline Arriaga, University of California, Los Angeles
• Eugene Chiang, University of California, Berkeley
• Eric L. Nielsen, SETI Institute
• James R. Graham, University of California, Berkeley
• Jason J. Wang, University of California, Berkeley
• Robert J.De Rosa, University of California, Berkeley
• Katherine B. Follette, Kavli Institute for Particle Astrophysics and Cosmology
• S. Mark Ammons, Lawrence Livermore National Laboratory
• Megan Ansdell, University of California, Berkeley
• Vanessa P. Bailey, Jet Propulsion Laboratory
• Travis Barman, The University of Arizona
• Juan Sebastián Bruzzone, Western University
• Joanna Bulger, National Institutes of Natural Sciences - National Astronomical Observatory of Japan
• Jeffrey Chilcote, Kavli Institute for Particle Astrophysics and Cosmology
• Tara Cotten, University of Georgia
• Rene Doyon, Institut de Recherche sur les Exoplanètes
• Michael P. Fitzgerald, University of California, Los Angeles
• Stephen J. Goodsell, Gemini Observatory
• Alexandra Z. Greenbaum, University of Michigan, Ann Arbor
• Pascale Hibon, Gemini ObservatorySouthern Operations Center
• Li Wei Hung, University of California, Los Angeles
• Patrick Ingraham, Large Synoptic Survey Telescope
• Quinn Konopacky, Center for Astrophysics & Space Sciences
• James E. Larkin, University of California, Los Angeles
• Kimberly Ward-Duong, Amherst CollegeFollow
• et al, Various Institutions

Document Type

Article

Publication Date

8-1-2018

Publication Title

Astronomical Journal

Abstract

We present new high resolution imaging of a light-scattering dust ring and halo around the young star HD 35841. Using spectroscopic and polarimetric data from the Gemini Planet Imager in H-band (1.6 μm), we detect the highly inclined (i = 85°) ring of debris down to a projected separation of ∼12 au (∼0.″12) for the first time. Optical imaging from HST/STIS shows a smooth dust halo extending outward from the ring to >140 au (>1.″4). We measure the ring's scattering phase function and polarization fraction over scattering angles of 22°-125°, showing a preference for forward scattering and a polarization fraction that peaks at ∼30% near the ansae. Modeling of the scattered-light disk indicates that the ring spans radii of ∼60-220 au, has a vertical thickness similar to that of other resolved dust rings, and contains grains as small as 1.5 μm in diameter. These models also suggest the grains have a low porosity, are more likely to consist of carbon than astrosilicates, and contain significant water ice. The halo has a surface brightness profile consistent with that expected from grains pushed by radiation pressure from the main ring onto highly eccentric but still bound orbits. We also briefly investigate arrangements of a possible inner disk component implied by our spectral energy distribution models, and speculate about the limitations of Mie theory for doing detailed analyses of debris disk dust populations.

Keywords

circumstellar matter, infrared: planetary systems, stars: individual (HD 35841), techniques: high angular resolution

Volume

156

Issue

2

DOI

https://doi.org/10.3847/1538-3881/aacbc9

ISSN

00046256

Rights

© 2018. The American Astronomical Society.

Version

Version of Record

Recommended Citation

Esposito, Thomas M.; Duchne, Gaspard; Kalas, Paul; Rice, Malena; Choquet, Ilodie; Ren, Bin; Perrin, Marshall D.; Chen, Christine H.; Arriaga, Pauline; Chiang, Eugene; Nielsen, Eric L.; Graham, James R.; Wang, Jason J.; Rosa, Robert J.De; Follette, Katherine B.; Ammons, S. Mark; Ansdell, Megan; Bailey, Vanessa P.; Barman, Travis; Bruzzone, Juan Sebastián; Bulger, Joanna; Chilcote, Jeffrey; Cotten, Tara; Doyon, Rene; Fitzgerald, Michael P.; Goodsell, Stephen J.; Greenbaum, Alexandra Z.; Hibon, Pascale; Hung, Li Wei; Ingraham, Patrick; Konopacky, Quinn; Larkin, James E.; Ward-Duong, Kimberly; and al, et, "Direct Imaging of the HD 35841 Debris Disk: a Polarized Dust Ring from Gemini Planet Imager and an Outer Halo From HST/STIS" (2018). Astronomy: Faculty Publications, Smith College, Northampton, MA.
https://scholarworks.smith.edu/ast_facpubs/122