Exoclimes_Conference_booklet1

measurements of Planet Beta Pictoris b and Kappa And b in the J, H, Ks, L', NB 4.05, M'
bands and with spectroscopic observations of the HR8799 planetary system to constrain
Teff and g. Finally, our results are compared with those derived from other existing models.
This model will be used to interpret future photometric and spectroscopic observations of
exoplanets with SPHERE, mounted at the VLT with a first light expected in 2014.
Spitzer and z' Secondary Eclipse Observations of the Highly Irradiated Transiting
Brown Dwarf KELT-1b!
Thomas Beatty — Ohio State University!
KELT-1b is a highly-irradiated, highly-inflated, 27 Jupiter-mass object transiting a bright
(V=10.8) F5V star with a period of 1.2 days. KELT-1b offers a unique opportunity to study
the atmosphere of a brown dwarf with known mass, radius, and approximate age, in a
radiation environment similar to hot Jupiters. We present and discuss secondary eclipse
observations of this system taken using the Spitzer Space Telescope and from the ground.
We measure secondary eclipse depths of 0.196+/-0.01% at 3.6 μm and 0.200+/-0.012% at
4.5 μm, corresponding to a fairly grey color of [3.6]-[4.6] = 0.07+/-0.11. Using four separate
ground-based light curves, we find suggestive evidence for the secondary eclipse in the z
band with a depth of 0.046+/-0.023%. These observations represent the first constraints
on the atmospheric dynamics of a highly-irradiated brown dwarf, and are interesting in the
context of both the atmospheres of irradiated giant planets at high surface gravity, and the
atmospheres of brown dwarfs that are dominated by external, rather than internal, energy.
In particular, as compared to objects of similar temperature, KELT-1b has a [3.6]-[4.6] color
that is similar to isolated brown dwarfs, in contrast to lower surface gravity exoplanets,
which tend to have redder colors.
Critically testing atmospheric models with benchmark brown dwarfs
Ben Burningham — University of Hertfordshire
The current generation of wide-field surveys is probing such a volume that significant
numbers of brown dwarfs are being identified as rare wide common proper motion binary
companions to higher mass stellar primaries. If such systems are formed in the same
manner as similarly separated stellar binaries then it follows that the composition and age
of the primary may be used to infer the same properties for the low-mass companion,
making such systems attractive calibrators for substellar and exoplanetary atmospheric
(spectral) model grids. They are thus referred to as benchmark systems. In this
contribution, I will discuss recent results from our search for substellar benchmarks,
focusing on how the emerging grid of calibrated atmospheres can be used to provide new
insights into the strengths and deficiencies of differing model approaches, and highlighting
how benchmark systems have revealed that metallicity is as important as effective
temperature for determining the SED of cool substellar objects. Finally, I will explore how
the potential of benchmark brown dwarfs for breaking observational degeneracies can be
realised to solve key science goals in exoplanetary science.
Doppler imaging of a Nearby Cloudy Brown Dwarf
Ian Crossfield — MPIA
Brown dwarfs provide easily-observable analogues to young extrasolar planets with similar
temperatures and radii but lower masses. Brown dwarfs are the first substellar objects for
58