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Title: Bringing "The Moth" to light: A planet-sculpting scenario for the HD 61005 debris disk

Here, the HD 61005 debris disk ("The Moth") stands out from the growing collection of spatially resolved circumstellar disks by virtue of its unusual swept-back morphology, brightness asymmetries, and dust ring offset. Despite several suggestions for the physical mechanisms creating these features, no definitive answer has been found. In this work, we demonstrate the plausibility of a scenario in which the disk material is shaped dynamically by an eccentric, inclined planet. We present new Keck NIRC2 scattered-light angular differential imaging of the disk at 1.2–2.3 μm that further constrains its outer morphology (projected separations of 27–135 au). We also present complementary Gemini Planet Imager 1.6 μm total intensity and polarized light detections that probe down to projected separations less than 10 au. To test our planet-sculpting hypothesis, we employed secular perturbation theory to construct parent body and dust distributions that informed scattered-light models. We found that this method produced models with morphological and photometric features similar to those seen in the data, supporting the premise of a planet-perturbed disk. Briefly, our results indicate a disk parent body population with a semimajor axis of 40–52 au and an interior planet with an eccentricity of at least 0.2. Many permutations of planetmore » mass and semimajor axis are allowed, ranging from an Earth mass at 35 au to a Jupiter mass at 5 au.« less
Authors:
ORCiD logo [1] ; ORCiD logo [2] ;  [3] ;  [4] ; ORCiD logo [3] ; ORCiD logo [3] ; ORCiD logo [5] ; ORCiD logo [3] ; ORCiD logo [6] ; ORCiD logo [7] ; ORCiD logo [8] ;  [9] ; ORCiD logo [3] ; ORCiD logo [10] ; ORCiD logo [11] ; ORCiD logo [12] ; ORCiD logo [13] ; ORCiD logo [14] ;  [14] ; ORCiD logo [15] more »; ORCiD logo [16] ;  [12] ; ORCiD logo [17] « less
  1. Univ. of California, Los Angeles, CA (United States); Univ. of California, Berkeley, CA (United States)
  2. Univ. of California, Los Angeles, CA (United States)
  3. Univ. of California, Berkeley, CA (United States)
  4. Univ. of California, Berkeley, CA (United States); SETI Institute, Mountain View, CA (United States)
  5. Univ. of California, Berkeley, CA (United States); Univ. Grenoble Alpes/CNRS, Grenoble (France)
  6. Univ. of Toronto, Toronto, ON (Canada)
  7. SETI Institute, Mountain View, CA (United States); Stanford Univ., Stanford, CA (United States)
  8. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  9. Univ. of Western Ontario, London, ON (Canada)
  10. Univ. of Victoria, Victoria, BC (Canada); National Research Council of Canada Herzberg, Victoria, BC (Canada)
  11. Stanford Univ., Stanford, CA (United States)
  12. SETI Institute, Mountain View, CA (United States)
  13. Univ. of Western Ontario, London, ON (Canada); Stony Brook Univ., Stony Brook, NY (United States)
  14. Space Telescope Science Institute, Baltimore, MD (United States)
  15. Arizona State Univ., Tempe, AZ (United States)
  16. Gemini Observatory, La Serena (Chile)
  17. Johns Hopkins Univ., Baltimore, MD (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-717747
Journal ID: ISSN 1538-3881
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Astronomical Journal (Online)
Additional Journal Information:
Journal Name: Astronomical Journal (Online); Journal Volume: 152; Journal Issue: 4; Journal ID: ISSN 1538-3881
Publisher:
IOP Publishing
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; infrared: planetary systems; planet; disk interactions; stars: individual (HD 61005); techniques:high angular resolution; techniques: polarimetric
OSTI Identifier:
1352118