VLT/NACO adaptive optics imaging of GSS 30 IRS1: a protostellar binary system?*
Max Planck Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany e-mail: [chen;rlau;henning]@mpia-hd.mpg.de
Accepted: 28 August 2007
Aims.We present high-resolution near-infrared images of the low-mass Class I young stellar object GSS 30 IRS1.
Methods.The data were retrieved from the ESO archive and acquired in the -bands with the adaptive optics system NACO at the ESO Very Large Telescope.
Results.We discover two separate components in GSS 30 IRS1. The angular separation between the two components is ~015, corresponding to a projected linear separation of 24 AU at a distance of 160 pc. The brightness contrasts between the two components are ~1.4 mag at H band, 1.5 mag at Ks band, and 2.1 mag at L' band. The two components detected in GSS 30 IRS1 could represent two scattered light structures related to an outflow-disk complex or two young stellar objects embedded in a common disk. Here we discuss these two possibilities, as well as the CO ro-vibrational emission from GSS 30 IRS1.
Key words: binaries: close / stars: formation / stars: individual: GSS 30 IRS1
© ESO, 2007