Published February 24, 2021 | Version v1
Poster Open

Vertical Cloud Structure of an AB Pictoris b Analog through Keck I/MOSFIRE spectro-photometric variability

  • 1. AURA for the European Space Agency (ESA), ESA Office, Space Telescope Science Institute
  • 2. Department of Physics, University of Central Flori
  • 3. Department of Astrophysics, American Museum of Natural Hist
  • 4. SUPA, Institute for Astronomy, University of Edinbur
  • 5. Lunar and Planetary Laboratory, The University of Arizona


Photometric variability at different wavelengths provide insights into the vertical cloud structure of brown dwarfs and planetary-mass objects.
We obtained time-resolved spectroscopy in the J-band of the planetary-mass L3 dwarf 2MASS J22081363+2921215, analog to the  AB Pic b planet, obtaining a variability amplitude of 3.23%. We find that the variability of object is enhanced in the KI and Na I alkali lines.
Using radiative-transfer models, we derived the different cloud layers that might be introducing the spectro-photometric variability we observe for 2MASS J22081363+2921215. 



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