Optical Images of an Exosolar Planet 25 Light-Years from Earth

By P. Kalas, J. Graham, E. Chiang, M. Fitzgerald, M. Clampin, E. Kite, K. Stapelfeldt, C. Marois, J. Krist. Science, 2008

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Fomalhaut, a bright star 7.7 parsecs (25 light-years) from Earth, harbors a belt of cold dust with a structure consistent with gravitational sculpting by an orbiting planet. Here, we present optical observations of an exoplanet candidate, Fomalhaut b. Fomalhaut b lies about 119 astronomical units (AU) from the star and 18 AU of the dust belt, matching predictions of its location. Hubble Space Telescope observations separated by 1.73 years reveal counterclockwise orbital motion. Dynamical models of the interaction between the planet and the belt indicate that the planet's mass is at most three times that of Jupiter; a higher mass would lead to gravitational disruption of the belt, matching predictions of its location. The flux detected at 0.8 μm is also consistent with that of a planet with mass no greater than a few times that of Jupiter. The brightness at 0.6 μm and the lack of detection at longer wavelengths suggest that the detected flux may include starlight reflected off a circumplanetary disk, with dimension comparable to the orbits of the Galilean satellites. We also observe variability of unknown origin at 0.6 μm.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/8e568deab110412155f147441641e8f3e85a1a39

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Citations in the corpus

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• Planet Hunters IX. KIC 8462852-where's the flux? (2015, result): “This scenario is therefore analogous to that suggested for the enigmatic exoplanet Fomalhaut b (Kalas et al. 2008; Kennedy & Wyatt 2011), which borrows from the irregular satellites seen in the Solar system (e.g. Jewitt & Haghighipour 2007; Bottke et al. 2010).”
• Photometric characterization of exoplanets using angular and spectral differential imaging (2010, background): “…(Itoh et al. 2005), GQ Lup b (Neuhäuser et al. 2005), AB Pic b (Chauvin et al. 2005), CHXR 73 B (Luhman et al. 2006), and more recently Fomalhaut b (Kalas et al. 2008), 1RXS J1609 b (Lafrenière et al. 2008), β Pic b (Lagrange et al. 2008) and the triple system around HR 8799 (Marois et al. 2008).”
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• THE VECTOR VORTEX CORONAGRAPH: LABORATORY RESULTS AND FIRST LIGHT AT PALOMAR OBSERVATORY (2009, background): “Keplerian motion was unambiguously detected for the most recent discoveries of Kalas et al. (2008) around Fomalhaut and Marois et al. (2008) around HR 8799.”
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