LkCa 15: A Young Exoplanet Caught at Formation?

Abstract

Young and directly imaged exoplanets offer critical tests of planet-formation models that are not matched by RV surveys of mature stars. These targets have been extremely elusive to date, with no exoplanets younger than 10--20 Myr and only a handful of direct-imaged exoplanets at all ages. We report the direct imaging discovery of a likely (proto)planet around the young (~2 Myr) solar analog LkCa 15, located inside a known gap in the protoplanetary disk (a "transitional disk"). Our observations use non-redundant aperture masking interferometry at 3 epochs to reveal a faint and relatively blue point source ($M_K'=9.1+/-0.2, K'-L'=0.98+/-0.22), flanked by approximately co-orbital emission that is red and resolved into at least two sources (M_L'=7.5+/-0.2, K'-L'=2.7+/-0.3; M_L'=7.4+/-0.2, K'-L'=1.94+/-0.16). We propose that the most likely geometry consists of a newly-formed (proto)planet that is surrounded by dusty material. The nominal estimated mass is ~6 M_{Jup} according to the 1 Myr hot-start models. However, we argue based on its luminosity, color, and the presence of circumplanetary material that the planet has likely been caught at its epoch of assembly, and hence this mass is an upper limit due to its extreme youth and flux contributed by accretion. The projected separations (71.9 +/- 1.6 mas, 100.7 +/- 1.9 mas, and 88.2 +/- 1.8 mas) and deprojected orbital radii (16, 21, and 19 AU) correspond to the center of the disk gap, but are too close to the primary star for a circular orbit to account for the observed inner edge of the outer disk, so an alternate explanation (i.e., additional planets or an eccentric orbit) is likely required. This discovery is the first direct evidence that at least some transitional disks do indeed host newly-formed (or forming) exoplanetary systems, and the observed properties provide crucial insight into the gas giant formation process.

Accepted to ApJ; 15 pages, 4 figures, 2 tabls in emulateapj format

References in corpus (20)

• Direct Imaging of Multiple Planets Orbiting the Star HR 8799
• Optical Images of an Exosolar Planet 25 Light Years from Earth
• On the Luminosity of Young Jupiters
• Planet formation around stars of various masses: The snow line and the frequency of giant planets
• Imaging the Surface of Altair
• On the Diversity of the Taurus Transitional Disks: UX Tau A & Lk Ca 15
• The Two Modes of Gas Giant Planet Formation
• First Resolved Images of the Eclipsing and Interacting Binary Beta Lyrae
• Synthetic Spectra and Colors of Young Giant Planet Atmospheres: Effects of Initial Conditions and Atmospheric Metallicity
• The Disk Around CoKu Tau/4: Circumbinary, not Transitional
• LkH$\alpha$ 330: Evidence for dust clearing through resolved submillimeter imaging
• Transitional Disks as Signposts of Young, Multiplanet Systems
• Mapping the Shores of the Brown Dwarf Desert I.: Upper Scorpius
• Measuring tiny mass accretion rates onto young brown dwarfs
• A 5 Micron Image of beta Pictoris b at a Sub-Jupiter Projected Separation: Evidence for a Misalignment Between the Planet and the Inner, Warped Disk
• Sparse aperture masking at the VLT I. Faint companion detection limits for the two debris disk stars HD 92945 and HD 141569
• Disk Dispersal and Planet Formation Time Scales
• Monte-Carlo Imaging for Optical Interferometry
• Dynamical Mass of GJ 802B: a brown dwarf in a triple system
• Saturn Forms by Core Accretion in 3.4 Myr

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