THE TRANSIT LIGHT CURVE OF AN EXOZODIACAL DUST CLOUD

doi:10.1088/0004-6256/142/4/123

Title: THE TRANSIT LIGHT CURVE OF AN EXOZODIACAL DUST CLOUD

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Abstract

Planets embedded within debris disks gravitationally perturb nearby dust and can create clumpy, azimuthally asymmetric circumstellar ring structures that rotate in lock with the planet. The Earth creates one such structure in the solar zodiacal dust cloud. In an edge-on system, the dust 'clumps' periodically pass in front of the star as the planet orbits, occulting and forward-scattering starlight. In this paper, we predict the shape and magnitude of the corresponding transit signal. To do so, we model the dust distributions of collisional, steady-state exozodiacal clouds perturbed by planetary companions. We examine disks with dusty ring structures formed by the planet's resonant trapping of in-spiraling dust for a range of planet masses and semi-major axes, dust properties, and disk masses. We synthesize edge-on images of these models and calculate the transit signatures of the resonant ring structures. The transit light curves created by dusty resonant ring structures typically exhibit two broad transit minima that lead and trail the planetary transit. We find that Jupiter-mass planets embedded within disks hundreds of times denser than our zodiacal cloud can create resonant ring structures with transit depths up to {approx}10{sup -4}, possibly detectable with Kepler. Resonant rings produced by planets more or lessmore »« less

Authors:

Stark, Christopher C., E-mail: cstark@dtm.ciw.edu ^[1]

Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC 20015-1305 (United States)

Publication Date:: Sat Oct 15 00:00:00 EDT 2011

OSTI Identifier:: 21582831

Resource Type:: Journal Article

Journal Name:: Astronomical Journal (New York, N.Y. Online)

Additional Journal Information:: Journal Volume: 142; Journal Issue: 4; Other Information: DOI: 10.1088/0004-6256/142/4/123; Journal ID: ISSN 1538-3881

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; DUSTS; INTERPLANETARY SPACE; INTERSTELLAR GRAINS; INTERSTELLAR SPACE; JUPITER PLANET; ORBITS; STARS; STEADY-STATE CONDITIONS; PARTICLES; PLANETS; SPACE

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                    Stark, Christopher C., E-mail: cstark@dtm.ciw.edu. THE TRANSIT LIGHT CURVE OF AN EXOZODIACAL DUST CLOUD.  United States: N. p., 2011. 
        Web.  doi:10.1088/0004-6256/142/4/123.

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                    Stark, Christopher C., E-mail: cstark@dtm.ciw.edu. THE TRANSIT LIGHT CURVE OF AN EXOZODIACAL DUST CLOUD.  United States.  https://doi.org/10.1088/0004-6256/142/4/123

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                    Stark, Christopher C., E-mail: cstark@dtm.ciw.edu. 2011.  
        "THE TRANSIT LIGHT CURVE OF AN EXOZODIACAL DUST CLOUD".  United States.  https://doi.org/10.1088/0004-6256/142/4/123.

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@article{osti_21582831,

  title        = {THE TRANSIT LIGHT CURVE OF AN EXOZODIACAL DUST CLOUD},

  author       = {Stark, Christopher C., E-mail: cstark@dtm.ciw.edu},

  abstractNote = {Planets embedded within debris disks gravitationally perturb nearby dust and can create clumpy, azimuthally asymmetric circumstellar ring structures that rotate in lock with the planet. The Earth creates one such structure in the solar zodiacal dust cloud. In an edge-on system, the dust 'clumps' periodically pass in front of the star as the planet orbits, occulting and forward-scattering starlight. In this paper, we predict the shape and magnitude of the corresponding transit signal. To do so, we model the dust distributions of collisional, steady-state exozodiacal clouds perturbed by planetary companions. We examine disks with dusty ring structures formed by the planet's resonant trapping of in-spiraling dust for a range of planet masses and semi-major axes, dust properties, and disk masses. We synthesize edge-on images of these models and calculate the transit signatures of the resonant ring structures. The transit light curves created by dusty resonant ring structures typically exhibit two broad transit minima that lead and trail the planetary transit. We find that Jupiter-mass planets embedded within disks hundreds of times denser than our zodiacal cloud can create resonant ring structures with transit depths up to {approx}10{sup -4}, possibly detectable with Kepler. Resonant rings produced by planets more or less massive than Jupiter produce smaller transit depths. Observations of these transit signals may provide upper limits on the degree of asymmetry in exozodiacal clouds.},

  doi          = {10.1088/0004-6256/142/4/123},

  url          = {https://www.osti.gov/biblio/21582831},
  journal      = {Astronomical Journal (New York, N.Y. Online)},

  issn         = {1538-3881},

  number       = 4,

  volume       = 142,

  place        = {United States},

  year         = {Sat Oct 15 00:00:00 EDT 2011},

  month        = {Sat Oct 15 00:00:00 EDT 2011}

}

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