Aims. We address the problem of young stellar objects that are found too far away from possible star formation sites. Different mechanisms have been proposed before to explain this unexpected circumstance. The idea high-velocity protostars is one these mechanisms, although observational support not always easy obtain. aim shed light on issue after serendipitous discovery a related system. Metho...

Combining resolved spectroscopy with deep imaging, XMM-Newton is providing new insights on the particle acceleration processes long known to be at work in the magnetospheres of isolated neutron stars. According to a standard theoretical interpretation, in neutron stars' magnetospheres particles are accelerated along the B field lines and, depending on their charge, they can either move outward,...

The equation of state provided by effective models strongly interacting matter should comply with the restrictions imposed current astrophysical observations on compact stars. Using given (axial-)vector meson extended linear sigma model, we determine mass-radius relation and study whether these are satisfied under assumption that most star is filled quark matter. We dependence parameters model.

This paper presents first long-slit spectroscopic observations of the forbidden [O I](1F) emission line regions around selected pre-main sequence Herbig Ae/Be stars. Contrary to the lower-mass T Tauri stars, the observations show that the selected Herbig stars do not reveal neither signs of extended or positionally decentered [O I](1F) emission regions, nor signs of outflows or jets in the prox...