Direct Imaging of the HD 35841 Debris Disk: A Polarized Dust Ring from Gemini Planet Imager and an Outer Halo from HST/STIS
In: The Astronomical Journal, Jg. 156 (2018-08-01), Heft 2
academicJournal
- 47
Zugriff:
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.
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Direct Imaging of the HD 35841 Debris Disk: A Polarized Dust Ring from Gemini Planet Imager and an Outer Halo from HST/STIS
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Autor/in / Beteiligte Person: | Esposito, Thomas M ; Duchêne, Gaspard ; Kalas, Paul ; Rice, Malena ; Choquet, Élodie ; Ren, Bin ; Perrin, Marshall D ; Chen, Christine H ; Arriaga, Pauline ; Chiang, Eugene ; Nielsen, Eric L ; Graham, James R ; Wang, Jason J ; De Rosa, Robert J ; 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 ; Macintosh, Bruce ; Maire, Jérôme ; Marchis, Franck ; Marois, Christian ; Mazoyer, Johan ; Metchev, Stanimir ; Millar-Blanchaer, Maxwell A ; Oppenheimer, Rebecca ; Palmer, David ; Patience, Jennifer ; Poyneer, Lisa ; Pueyo, Laurent ; Rajan, Abhijith ; Rameau, Julien ; Rantakyrö, Fredrik T ; Ryan, Dominic ; Savransky, Dmitry ; Schneider, Adam C ; Sivaramakrishnan, Anand ; Song, Inseok ; Soummer, Rémi ; Thomas, Sandrine ; Wallace, J Kent ; Ward-Duong, Kimberly ; Wiktorowicz, Sloane ; Wolff, Schuyler |
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Zeitschrift: | The Astronomical Journal, Jg. 156 (2018-08-01), Heft 2 |
Veröffentlichung: | eScholarship, University of California, 2018 |
Medientyp: | academicJournal |
Umfang: | 47 |
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