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; Benot Mosser; Francois Xavier Schmider

doi:10.3847/1538-3881/aa6119

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. HaasBenot Mosser, Francois Xavier Schmider

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

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 language	English (US)
Article number	149
Journal	Astronomical Journal
Volume	153
Issue number	4
DOIs	https://doi.org/10.3847/1538-3881/aa6119
State	Published - Apr 2017
Externally published	Yes

Keywords

planetary systems
planets and satellites: gaseous planets

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-3881/aa6119

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Rowe, J. F., Gaulme, P., Lissauer, J. J., Marley, M. S., Simon, A. A., Hammel, H. B., Silva Aguirre, V., Barclay, T., Benomar, O., Boumier, P., Caldwell, D. A., Casewell, S. L., Chaplin, W. J., Colón, K. D., Corsaro, E., Davies, G. R., Fortney, J. J., Garcia, R. A., Gizis, J. E., ... Schmider, F. X. (2017). Time-series Analysis of Broadband Photometry of Neptune from K2. Astronomical Journal, 153(4), Article 149. https://doi.org/10.3847/1538-3881/aa6119

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

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title = "Time-series Analysis of Broadband Photometry of Neptune from K2",

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.",

keywords = "planetary systems, planets and satellites: gaseous planets",

author = "Rowe, {Jason F.} and Patrick Gaulme and Lissauer, {Jack J.} and Marley, {Mark S.} and Simon, {Amy A.} and Hammel, {Heidi B.} and {Silva Aguirre}, V{\'i}ctor and Thomas Barclay and Othman Benomar and Patrick Boumier and Caldwell, {Douglas A.} and Casewell, {Sarah L.} and Chaplin, {William J.} and Col{\'o}n, {Knicole D.} and Enrico Corsaro and Davies, {G. R.} and Fortney, {Jonathan J.} and Garcia, {Rafael A.} and Gizis, {John E.} and Haas, {Michael R.} and Benot Mosser and Schmider, {Francois Xavier}",

year = "2017",

month = apr,

doi = "10.3847/1538-3881/aa6119",

language = "English (US)",

volume = "153",

journal = "Astronomical Journal",

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T1 - Time-series Analysis of Broadband Photometry of Neptune from K2

AU - Rowe, Jason F.

AU - Gaulme, Patrick

AU - Lissauer, Jack J.

AU - Marley, Mark S.

AU - Simon, Amy A.

AU - Hammel, Heidi B.

AU - Silva Aguirre, Víctor

AU - Barclay, Thomas

AU - Benomar, Othman

AU - Boumier, Patrick

AU - Caldwell, Douglas A.

AU - Casewell, Sarah L.

AU - Chaplin, William J.

AU - Colón, Knicole D.

AU - Corsaro, Enrico

AU - Davies, G. R.

AU - Fortney, Jonathan J.

AU - Garcia, Rafael A.

AU - Gizis, John E.

AU - Haas, Michael R.

AU - Mosser, Benot

AU - Schmider, Francois Xavier

PY - 2017/4

Y1 - 2017/4

N2 - 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.

AB - 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.

KW - planetary systems

KW - planets and satellites: gaseous planets

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JF - Astronomical Journal

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M1 - 149

ER -

Time-series Analysis of Broadband Photometry of Neptune from K2

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