The peculiar debris disk of HD 111520 as resolved by the Gemini Planet Imager

Zachary H. Draper, Gaspard Duchêne, Maxwell A. Millar-Blanchaer, Brenda C. Matthews, Jason J. Wang, Paul Kalas, James R. Graham, Deborah Padgett, S. Mark Ammons, Joanna Bulger, Christine Chen, Jeffrey K. Chilcote, René Doyon, Michael P. Fitzgerald, Kate B. Follette, Benjamin Gerard, Alexandra Z. Greenbaum, Pascale Hibon, Sasha Hinkley, Bruce MacIntosh & 16 others Patrick Ingraham, David Lafrenière, Franck Marchis, Christian Marois, Eric L. Nielsen, Rebecca Oppenheimer, Rahul Patel, Jennifer Patience, Marshall Perrin, Laurent Pueyo, Abhijith Rajan, Julien Rameau, Anand Sivaramakrishnan, David Vega, Kimberly Ward-Duong, Schuyler G. Wolff

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Using the Gemini Planet Imager, we have resolved the circumstellar debris disk around HD 111520 at a projected range of ∼30-100 AU in both total and polarized H-band intensity. The disk is seen edge-on at a position angle of 165° along the spine of emission. A slight inclination and asymmetric warp are covariant and alter the interpretation of the observed disk emission. We employ three point-spread function subtraction methods to reduce the stellar glare and instrumental artifacts to confirm that there is a roughly 2:1 brightness asymmetry between the NW and SE extension. This specific feature makes HD 111520 the most extreme example of asymmetric debris disks observed in scattered light among similar highly inclined systems, such as HD 15115 and HD 106906. We further identify a tentative localized brightness enhancement and scale height enhancement associated with the disk at ∼40 AU away from the star on the SE extension. We also find that the fractional polarization rises from 10% to 40% from 0.″5 to 0.″8 from the star. The combination of large brightness asymmetry and symmetric polarization fraction leads us to believe that an azimuthal dust density variation is causing the observed asymmetry.

Original languageEnglish (US)
Article number147
JournalAstrophysical Journal
Volume826
Issue number2
DOIs
StatePublished - Aug 1 2016

Fingerprint

debris
planets
asymmetry
planet
polarization
brightness
artifact
glare
stars
spine
scale height
augmentation
dust
point spread functions
subtraction
inclination
artifacts

Keywords

  • circumstellar matter
  • stars: individual (HD 111520)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Draper, Z. H., Duchêne, G., Millar-Blanchaer, M. A., Matthews, B. C., Wang, J. J., Kalas, P., ... Wolff, S. G. (2016). The peculiar debris disk of HD 111520 as resolved by the Gemini Planet Imager. Astrophysical Journal, 826(2), [147]. https://doi.org/10.3847/0004-637X/826/2/147

The peculiar debris disk of HD 111520 as resolved by the Gemini Planet Imager. / Draper, Zachary H.; Duchêne, Gaspard; Millar-Blanchaer, Maxwell A.; Matthews, Brenda C.; Wang, Jason J.; Kalas, Paul; Graham, James R.; Padgett, Deborah; Ammons, S. Mark; Bulger, Joanna; Chen, Christine; Chilcote, Jeffrey K.; Doyon, René; Fitzgerald, Michael P.; Follette, Kate B.; Gerard, Benjamin; Greenbaum, Alexandra Z.; Hibon, Pascale; Hinkley, Sasha; MacIntosh, Bruce; Ingraham, Patrick; Lafrenière, David; Marchis, Franck; Marois, Christian; Nielsen, Eric L.; Oppenheimer, Rebecca; Patel, Rahul; Patience, Jennifer; Perrin, Marshall; Pueyo, Laurent; Rajan, Abhijith; Rameau, Julien; Sivaramakrishnan, Anand; Vega, David; Ward-Duong, Kimberly; Wolff, Schuyler G.

In: Astrophysical Journal, Vol. 826, No. 2, 147, 01.08.2016.

Research output: Contribution to journalArticle

Draper, ZH, Duchêne, G, Millar-Blanchaer, MA, Matthews, BC, Wang, JJ, Kalas, P, Graham, JR, Padgett, D, Ammons, SM, Bulger, J, Chen, C, Chilcote, JK, Doyon, R, Fitzgerald, MP, Follette, KB, Gerard, B, Greenbaum, AZ, Hibon, P, Hinkley, S, MacIntosh, B, Ingraham, P, Lafrenière, D, Marchis, F, Marois, C, Nielsen, EL, Oppenheimer, R, Patel, R, Patience, J, Perrin, M, Pueyo, L, Rajan, A, Rameau, J, Sivaramakrishnan, A, Vega, D, Ward-Duong, K & Wolff, SG 2016, 'The peculiar debris disk of HD 111520 as resolved by the Gemini Planet Imager', Astrophysical Journal, vol. 826, no. 2, 147. https://doi.org/10.3847/0004-637X/826/2/147
Draper ZH, Duchêne G, Millar-Blanchaer MA, Matthews BC, Wang JJ, Kalas P et al. The peculiar debris disk of HD 111520 as resolved by the Gemini Planet Imager. Astrophysical Journal. 2016 Aug 1;826(2). 147. https://doi.org/10.3847/0004-637X/826/2/147
Draper, Zachary H. ; Duchêne, Gaspard ; Millar-Blanchaer, Maxwell A. ; Matthews, Brenda C. ; Wang, Jason J. ; Kalas, Paul ; Graham, James R. ; Padgett, Deborah ; Ammons, S. Mark ; Bulger, Joanna ; Chen, Christine ; Chilcote, Jeffrey K. ; Doyon, René ; Fitzgerald, Michael P. ; Follette, Kate B. ; Gerard, Benjamin ; Greenbaum, Alexandra Z. ; Hibon, Pascale ; Hinkley, Sasha ; MacIntosh, Bruce ; Ingraham, Patrick ; Lafrenière, David ; Marchis, Franck ; Marois, Christian ; Nielsen, Eric L. ; Oppenheimer, Rebecca ; Patel, Rahul ; Patience, Jennifer ; Perrin, Marshall ; Pueyo, Laurent ; Rajan, Abhijith ; Rameau, Julien ; Sivaramakrishnan, Anand ; Vega, David ; Ward-Duong, Kimberly ; Wolff, Schuyler G. / The peculiar debris disk of HD 111520 as resolved by the Gemini Planet Imager. In: Astrophysical Journal. 2016 ; Vol. 826, No. 2.
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AU - Wolff, Schuyler G.

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