Aims. We present new astrometric measurements of the components in the T Tauri system and derive new orbits and masses. Methods. T Tauri was observed during the science verification time of the new extreme adaptive ...

Medium-resolution optical spectroscopy of the candidate young stellar objects associated with the small, nearby molecular cloud Lynds 1333 revealed four previously unknown classical T Tauri stars, two of which are components ...

T Tauri stars are low mass, pre-main sequencestars. These objects are surrounded by an accretion disk and present strongmagnetic activity. T Tauri stars are copious X-rays emitters. The X-rays arelikely generated by powerful ...

Magnetic fields in accretion disks play a dominant role during the star formation process but have hitherto been observationally poorly constrained. Field strengths have been inferred on T Tauri stars themselves and possibly ...

Context. About 2/3 of the Be stars present the so-called V/R variations, a phenomenon characterized by the quasi-cyclic variation in the ratio between the violet and red emission peaks of the HI emission lines. These ...

This paper presents optical (ugriH alpha)-infrared (JHKs, 3.6-8.0 mu m) photometry and Gaia astrometry of 55 Classical T-Tauri stars (CTTS) in the star-forming region Sh 2-012 and its central cluster NGC6383. The sample ...

More than 30% of γ -ray sources detected in the last source catalog of the Fermi satellite have no observational counterpart at other frequencies. A significant fraction of these sources is positionally in agreement with ...

More than 30% of γ -ray sources detected in the last source catalog of the Fermi satellite have no observational counterpart at other frequencies. A significant fraction of these sources is positionally in agreement with ...