An extended scattered light disk around AT Pyx

Aims. To understand how the multitude of planetary systems that have been discovered come to be, we need study at different evolutionary stages, with central stars but also in environments. The most challenging environment for planet formation may be harsh UV radiation field nearby massive which quickly erodes disks by external photo-evaporation. We observed AT Pyx system, located head a cometary globule Gum Nebula, search signs ongoing formation. Methods. used extreme adaptive optics imager VLT/SPHERE Dual Beam Polarization Imaging Mode H -band as well IRDIFS Extended mode ( K12 imaging and Y-H integral spectroscopy) observe polarized light total intensity. Additionally, employed VLT/NACO system L -band. Results. resolve disk around first time scattered across multiple wavelengths find an extended (≥126 au) disk, intermediate inclination between 35° 42°. shows complex substructure identify two or possibly three spiral-like features. Depending on precise geometry (which cannot unambiguously infer from our data), eccentric eccentricity ~0.16 partially self-shadowed. spiral features possible are both consistent signatures embedded gas giant mass ~1 M Jup . Our own observations can rule out brown dwarf companions resolved nevertheless not sensitive enough confirm presence giant. Conclusions. is spatially Nebula. By comparison Orion Nebula Cluster note extension exceptional this if indeed comparable other globules region. signposts intriguing followed up either higher sensitivity wavelengths.