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Title: DISCOVERY OF AN INNER DISK COMPONENT AROUND HD 141569 A

We report the discovery of a scattering component around the HD 141569 A circumstellar debris system, interior to the previously known inner ring. The discovered inner disk component, obtained in broadband optical light with Hubble Space Telescope/Space Telescope Imaging Spectrograph coronagraphy, was imaged with an inner working angle of 0.″25, and can be traced from 0.″4 (∼46 AU) to 1.″0 (∼116 AU) after deprojection using i = 55°. The inner disk component is seen to forward scatter in a manner similar to the previously known rings, has a pericenter offset of ∼6 AU, and break points where the slope of the surface brightness changes. It also has a spiral arm trailing in the same sense as other spiral arms and arcs seen at larger stellocentric distances. The inner disk spatially overlaps with the previously reported warm gas disk seen in thermal emission. We detect no point sources within 2″ (∼232 AU), in particular in the gap between the inner disk component and the inner ring. Our upper limit of 9 ± 3 M{sub J} is augmented by a new dynamical limit on single planetary mass bodies in the gap between the inner disk component and the inner ring of 1 M{sub J}, which is broadly consistent with previousmore » estimates.« less
Authors:
;  [1] ; ;  [2] ; ; ;  [3] ; ;  [4] ; ;  [5] ;  [6] ; ; ; ; ;  [7] ;  [8] ;  [9] ;  [10] more »; « less
  1. Department of Earth and Space Science, Graduate School of Science, Osaka University, Osaka (Japan)
  2. Eureka Scientific, Oakland, CA (United States)
  3. The University of Arizona, Tucson, AZ (United States)
  4. Goddard Space Flight Center, Greenbelt, MD (United States)
  5. Carnegie Institution of Washington, Washington, DC (United States)
  6. College of Charleston, Charleston, SC (United States)
  7. Space Telescope Science Institute, Baltimore, MD (United States)
  8. Max Planck Institute for Astronomy, Heidelberg (Germany)
  9. University of Wyoming, Laramie, WY (United States)
  10. Jet Propulsion Laboratory, California Institute of Technology, Pasadena CA (United States)
Publication Date:
OSTI Identifier:
22518611
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 818; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCRETION DISKS; BRIGHTNESS; IMAGES; MASS; RED DWARF STARS; SPACE; STELLAR CORONAE; TELESCOPES; VISIBLE RADIATION; WHITE DWARF STARS