Crossing the Gould Belt in the Orion vicinity

the Gould Belt vs. the Galactic disc

We present new population synthesis calculations of close young neutron stars. In comparison with our previous investigation we use a different neutron star mass spectrum and different initial spatial and velocity distributions. The results confirm that most of ROSAT dim radioquiet isolated neutron stars had their origin in the Gould Belt. Several tens of young neutron stars can be identified i...

The Herschel Gould Belt Survey in Chamaeleon II

Context. We report on the Herschel Gould Belt survey (HGBS) of the Chamaeleon II (Cha II) star-forming region, focusing on the detection of Class I to III young stellar objects (YSOs). Aims. We aim at characterizing the circumstellar material around these YSOs and at understanding which disk parameters are most likely constrained by the new HGBS data, which are expected to be crucial for studyi...

The Gould Belt, star formation, and the local interstellar medium

The history of the local medium, within a few hundred parsecs, is dominated by the evolution of the Gould Belt. The event that triggered this star-forming region and molded the gas distribution is still unknown. Its orientation and extent are reasonably well determined and its expansion matches the space and velocity distributions of many large HI and H2 clouds within half a kiloparsec. The pre...

Kinematic Peculiarities of Gould Belt Starsv

Vertical motion and expansion of the Gould Belt

The kinematics of the Gould Belt is considered taking into account its orientation in space and the motions of its member stars parallel and perpendicular to the galactic plane. An analysis of Hipparcos data for these stars, complemented with published radial velocities, shows that there is a mild gradient along the galactic plane in the velocity component perpendicular to it. The maintenance o...