Spectroscopy of Young Planetary Mass Candidates with Disks

Spectroscopy of Young Planetary Mass Candidates with Disks

It is now well established that many young brown dwarfs exhibit characteristics similar to classical T Tauri stars, including infrared excess from disks and emission lines related to accretion. Whether the same holds true for even lower mass objects, namely those near and below the Deuterium-burning limit, is an important question. Here we present optical spectra of six isolated planetary mass ...

Young Stellar Disks as the Sites of Planetary Evolution

Discovery of a young planetary-mass binary.

We have identified a companion to the young planetary-mass brown dwarf Oph 162225-240515. This pair forms a resolved binary consisting of two objects with masses comparable to those of extrasolar giant planets. Several lines of evidence confirm the coevality and youth of the two objects, suggesting that they form a physical binary. Models yield masses of approximately 14 and approximately 7 tim...

Direct Imaging and Spectroscopy of a Planetary Mass Candidate Companion to a Young Solar Analog

We present Gemini near-infrared adaptive optics imaging and spectroscopy of a planetary mass candidate companion to 1RXS J160929.1-210524, a roughly solar-mass member of the 5 Myr-old Upper Scorpius association. The object, separated by 2.22 or 330 AU at ∼150 pc, has infrared colors and spectra suggesting a temperature of 1800+200 −100 K, and spectral type of L4 +1 −2. The Hand K-band spectra p...

Planetary migration in protoplanetary disks

In the current paper, we further develop the model for the migration of planets introduced in Del Popolo et al. (2001) and extended to timedependent planetesimal accretion discs in Del Popolo & Ekşi (2002). We use a method developed by Stepinski & Valageas (1996, 1997), that is able to simultaneously follow the evolution of gas and solid particles for up to 10yr. The disc model is coupled to th...