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

Thomas M. Esposito, Gaspard Duchne, Paul Kalas, Malena Rice, Ilodie Choquet, Bin Ren, Marshall D. Perrin, Christine H. Chen, Pauline Arriaga, Eugene Chiang, Eric L. Nielsen, James R. Graham, Jason J. Wang, Robert J.De Rosa, Katherine B. Follette, S. Mark Ammons, Megan Ansdell, Vanessa P. Bailey, Travis Barman, Juan Sebastián BruzzoneJoanna Bulger, Jeffrey Chilcote, Tara Cotten, Rene Doyon, Michael P. Fitzgerald, Stephen J. Goodsell, Alexandra Z. Greenbaum, Pascale Hibon, Li Wei Hung, Patrick Ingraham, Quinn Konopacky, James E. Larkin, Bruce Macintosh, Jérôme Maire, Franck Marchis, Christian Marois, Johan Mazoyer, Stanimir Metchev, Maxwell A. Millar-Blanchaer, Rebecca Oppenheimer, David Palmer, Jennifer Patience, Lisa Poyneer, Laurent Pueyo, Abhijith Rajan, Julien Rameau, Fredrik T. Rantakyrö, Dominic Ryan, Dmitry Savransky, Adam C. Schneider, Anand Sivaramakrishnan, Inseok Song, Rémi Soummer, Sandrine Thomas, J. Kent Wallace, Kimberly Ward-Duong, Sloane Wiktorowicz, Schuyler Wolff

Research output: Contribution to journalArticle

5 Scopus citations

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.

Original languageEnglish (US)
Article number47
JournalAstronomical Journal
Volume156
Issue number2
DOIs
StatePublished - Aug 2018

Keywords

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

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Esposito, T. M., Duchne, G., Kalas, P., Rice, M., Choquet, I., Ren, B., Perrin, M. D., Chen, C. H., Arriaga, P., Chiang, E., Nielsen, E. L., Graham, J. R., Wang, J. J., Rosa, R. J. D., Follette, K. B., Ammons, S. M., Ansdell, M., Bailey, V. P., Barman, T., ... Wolff, S. (2018). Direct Imaging of the HD 35841 Debris Disk: A Polarized Dust Ring from Gemini Planet Imager and an Outer Halo from HST/STIS. Astronomical Journal, 156(2), [47]. https://doi.org/10.3847/1538-3881/aacbc9