Time-series Analysis of Broadband Photometry of Neptune from K2

Jason F. Rowe, Patrick Gaulme, Jack J. Lissauer, Mark S. Marley, Amy A. Simon, Heidi B. Hammel, Víctor Silva Aguirre, Thomas Barclay, Othman Benomar, Patrick Boumier, Douglas A. Caldwell, Sarah L. Casewell, William J. Chaplin, Knicole D. Colón, Enrico Corsaro, G. R. Davies, Jonathan J. Fortney, Rafael A. Garcia, John E. Gizis, Michael R. Haas & 2 others Benot Mosser, Francois Xavier Schmider

    Research output: Contribution to journalArticle

    Abstract

    We report here on our search for excess power in photometry of Neptune collected by the K2 mission that may be due to intrinsic global oscillations of the planet Neptune. To conduct this search, we developed new methods to correct for instrumental effects such as intrapixel variability and gain variations. We then extracted and analyzed the time-series photometry of Neptune from 49 days of nearly continuous broadband photometry of the planet. We find no evidence of global oscillations and place an upper limit of ∼5 ppm at 1000 for the detection of a coherent signal. With an observed cadence of 1 minute and a point-to-point scatter of less than 0.01%, the photometric signal is dominated by reflected light from the Sun, which is in turn modulated by atmospheric variability of Neptune at the 2% level. A change in flux is also observed due to the increasing distance between Neptune and the K2 spacecraft and the solar variability with convection-driven solar p modes present.

    Original languageEnglish (US)
    Article number149
    JournalAstronomical Journal
    Volume153
    Issue number4
    DOIs
    StatePublished - Apr 1 2017

    Fingerprint

    time series analysis
    Neptune (planet)
    Neptune
    photometry
    broadband
    planet
    oscillation
    oscillations
    planets
    spacecraft
    sun
    convection
    time series

    Keywords

    • planetary systems
    • planets and satellites: gaseous planets

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Rowe, J. F., Gaulme, P., Lissauer, J. J., Marley, M. S., Simon, A. A., Hammel, H. B., ... Schmider, F. X. (2017). Time-series Analysis of Broadband Photometry of Neptune from K2. Astronomical Journal, 153(4), [149]. https://doi.org/10.3847/1538-3881/aa6119

    Time-series Analysis of Broadband Photometry of Neptune from K2. / Rowe, Jason F.; Gaulme, Patrick; Lissauer, Jack J.; Marley, Mark S.; Simon, Amy A.; Hammel, Heidi B.; Silva Aguirre, Víctor; Barclay, Thomas; Benomar, Othman; Boumier, Patrick; Caldwell, Douglas A.; Casewell, Sarah L.; Chaplin, William J.; Colón, Knicole D.; Corsaro, Enrico; Davies, G. R.; Fortney, Jonathan J.; Garcia, Rafael A.; Gizis, John E.; Haas, Michael R.; Mosser, Benot; Schmider, Francois Xavier.

    In: Astronomical Journal, Vol. 153, No. 4, 149, 01.04.2017.

    Research output: Contribution to journalArticle

    Rowe, JF, Gaulme, P, Lissauer, JJ, Marley, MS, Simon, AA, Hammel, HB, Silva Aguirre, V, Barclay, T, Benomar, O, Boumier, P, Caldwell, DA, Casewell, SL, Chaplin, WJ, Colón, KD, Corsaro, E, Davies, GR, Fortney, JJ, Garcia, RA, Gizis, JE, Haas, MR, Mosser, B & Schmider, FX 2017, 'Time-series Analysis of Broadband Photometry of Neptune from K2', Astronomical Journal, vol. 153, no. 4, 149. https://doi.org/10.3847/1538-3881/aa6119
    Rowe JF, Gaulme P, Lissauer JJ, Marley MS, Simon AA, Hammel HB et al. Time-series Analysis of Broadband Photometry of Neptune from K2. Astronomical Journal. 2017 Apr 1;153(4). 149. https://doi.org/10.3847/1538-3881/aa6119
    Rowe, Jason F. ; Gaulme, Patrick ; Lissauer, Jack J. ; Marley, Mark S. ; Simon, Amy A. ; Hammel, Heidi B. ; Silva Aguirre, Víctor ; Barclay, Thomas ; Benomar, Othman ; Boumier, Patrick ; Caldwell, Douglas A. ; Casewell, Sarah L. ; Chaplin, William J. ; Colón, Knicole D. ; Corsaro, Enrico ; Davies, G. R. ; Fortney, Jonathan J. ; Garcia, Rafael A. ; Gizis, John E. ; Haas, Michael R. ; Mosser, Benot ; Schmider, Francois Xavier. / Time-series Analysis of Broadband Photometry of Neptune from K2. In: Astronomical Journal. 2017 ; Vol. 153, No. 4.
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