CXB3 is a symbiotic binary star candidate identified by the Galactic Bulge Survey using X-ray observations by the Chandra X-ray Observatory. Using new Chandra observations, we demonstrate X-ray variability CXB3 with observations showing it usually in a quiescent state with a factor-of-six flare-like event in the last observation. Spectra of CXB3 we

We report the discovery of two planetary systems, namely G 264-012, an M 4.0 dwarf with two terrestrial planets (M b sin i=2.50 −0.30 +0.29 M ⊕ and M c sin i=3.75 −0.47 +0.48 M ⊕), and Gl 393, a bright M 2.0 dwarf with one terrestrial planet (M b sini = 1.71 ± 0.24M ⊕). Although both stars were proposed to belong to young stellar kinematic groups

The BL Lac object 1ES~2344+514 was one of the first sources to be included in the extreme high-peaked BL Lac (EHBL) family. EHBLs are characterised by a broadband spectral energy distribution featuring the synchrotron peak above $\sim 1$ keV. 1ES~2344+514 was detected in very-high-energy (VHE) gamma rays for the first time by the Whipple telescope

Context. The nuclear stellar disc (NSD) is, together with the nuclear star cluster (NSC) and the central massive black hole, one of the main components in the central parts of our Milky Way. However, until recently, only a few studies of the stellar content of the NSD have been obtained owing to extreme extinction and stellar crowding. Aims: We

Exoplanets transiting bright nearby stars are key objects for advancing our knowledge of planetary formation and evolution. The wealth of photons from the host star gives detailed access to the atmospheric, interior and orbital properties of the planetary companions. ν 2 Lupi (HD 136352) is a naked-eye (V = 5.78) Sun-like star that was discovered

Solar prominences are formed by partially ionized plasma with inter-particle collision frequencies generally warranting magnetohydrodynamic treatment. In this work we explore the dynamical impacts and observable signatures of two-fluid effects in the parameter regimes when ion-neutral collisions do not fully couple the neutral and charged fluids