• Publications
  • Influence
Cloud Atlas: High-contrast Time-resolved Observations of Planetary-mass Companions
Directly imaged planetary-mass companions offer unique opportunities in atmospheric studies of exoplanets. They share characteristics of both brown dwarfs and transiting exoplanets, and therefore areExpand
  • 10
  • 3
  • PDF
Variability in a Young, L/T Transition Planetary-Mass Object
As part of our ongoing NTT SoFI survey for variability in young free-floating planets and low mass brown dwarfs, we detect significant variability in the young, free-floating planetary mass objectExpand
  • 36
  • 3
  • PDF
Cloud Atlas: Rotational Spectral Modulations and potential Sulfide Clouds in the Planetary-mass, Late T-type Companion Ross 458C.
Measurements of photometric variability at different wavelengths provide insights into the vertical cloud structure of brown dwarfs and planetary-mass objects. In seven Hubble Space TelescopeExpand
  • 10
  • 2
  • PDF
Parallax measurements of cool brown dwarfs
Landessternwarte Konigstuhl 12, D-69117 Heidelberg, Germanye-mail: sreffert@lsw.uni-heidelberg.deReceived 18 April 2013; accepted October 2013ABSTRACTContext. Accurate parallax measurements allow usExpand
  • 10
  • 2
  • PDF
Confirming the least massive members of the Pleiades star cluster
We present optical photometry (i- and Z-band) and low-resolution spectroscopy (640-1015 nm) of very faint candidate members (J = 20.2-21.2 mag) of the Pleiades star cluster (120 Myr). The main goalExpand
  • 5
  • 2
  • PDF
Deep $z$-band observations of the coolest Y dwarf
WISE J085510.83-071442.5 (hereafter, WISE 0855-07) is the coolest Y dwarf known to date and is located at a distance of 2.31$\pm 0.08$ pc, giving it the fourth largest parallax of any known star orExpand
  • 15
  • 2
  • PDF
Cloud Atlas: Hubble Space Telescope Near-Infrared Spectral Library of Brown Dwarfs, Planetary-mass companions, and hot Jupiters
Bayesian atmospheric retrieval tools can place constraints on the properties of brown dwarfs and hot Jupiters atmospheres. To fully exploit these methods, high signal-to-noise spectral libraries withExpand
  • 8
  • 2
  • PDF
Testing the existence of optical linear polarization in young brown dwarfs
Linear polarization can be used as a probe of the existence of atmospheric condensates in ultracool dwarfs. Models predict that the observed linear polarization increases withthe degree ofExpand
  • 4
  • 2
  • PDF
Cloud Atlas: Rotational Modulations in the L/T Transition Brown Dwarf Companion HN Peg B
Time-resolved observations of brown dwarfs' rotational modulations provide powerful insights into the properties of condensate clouds in ultra-cool atmospheres. Multi-wavelength light curves revealExpand
  • 12
  • 1
  • PDF
Cloud Atlas: High-precision HST/WFC3/IR Time-Resolved Observations of Directly-Imaged Exoplanet HD106906b
HD106906b is an ~11$M_{\mathrm{Jup}}$, ~15Myr old directly-imaged exoplanet orbiting at an extremely large distance from its host star. The wide separation (7.11 arcsec) between HD106906b and itsExpand
  • 3
  • 1
  • PDF