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
  We present and analyze a new M' detection of the young exoplanet beta Pictoris b from 2008 VLT/NaCo data at a separation of ~ 4 AU and a high signal-to-noise rereduction of L' data taken in December 2009. Based on our orbital analysis, the planet's orbit is viewed almost perfectly edge-on (i ~ 89 degrees) and has a Saturn-like semimajor axis of 9.50 (+3.93, -1.7) AU. Intriguingly, the planet's orbit is aligned with the major axis of the outer disk (Omega ~ 31 degrees) but probably misaligned with the warp/inclined disk at 80 AU often cited as a signpost for the planet's existence. Our results motivate new studies to clarify how $\beta$ Pic b sculpts debris disk structures and whether a second planet is required to explain the warp/inclined disk. 
Thayne Currie, Christian Thalmann, Soko Matsumura, Nikku Madhusudhan,   Adam Burrows, and Marc Kuchner
astro-ph.EP astro-ph.IM astro-ph.SR