Planet(s) at HD 10647 (q1 Eridani)

High resolution ALMA and HST images of q¹ Eri: an asymmetric debris disc with an eccentric Jupiter

Quote :

We present \textit{ALMA} 1.3 mm and 0.86 mm observations of the nearby (17.34 pc) F9V star q¹ Eri (HD 10647, HR 506). This system, with age ∼1.4 Gyr, hosts a ∼2 au radial velocity planet and a debris disc with the highest fractional luminosity of the closest 300 FGK type stars. The ALMA images, with resolution ∼0.5′′, reveal a broad (34{-}134 au) belt of millimeter emission inclined by 76.7±1.0 degrees with maximum brightness at 81.6±0.5 au. The images reveal an asymmetry, with higher flux near the southwest ansa, which is also closer to the star. Scattered light observed with the Hubble Space Telescope is also asymmetric, being more radially extended to the northeast. We fit the millimeter emission with parametric models and place constraints on the disc morphology, radius, width, dust mass, and scale height. We find the southwest ansa asymmetry is best fitted by an extended clump on the inner edge of the disc, consistent with perturbations from a planet with mass 8M_⊕-11M_Jup at ∼60 au that may have migrated outwards, similar to Neptune in our Solar System. If the measured vertical aspect ratio of h=0.04±0.01 is due to dynamical interactions in the disc, then this requires perturbers with sizes >1200 km. We find tentative evidence for an 0.86 mm excess within 10 au, 70±22μJy, that may be due to an inner planetesimal belt. We find no evidence for CO gas, but set an upper bound on the CO gas mass of 4×10^-6 M_⊕ (3σ), consistent with cometary abundances in the Solar System.

Meanwhile EPE "parks" it as among exoplanet candidates:

http://exoplanet.eu/catalog/hd_10647_c/