Context: To obtain a significant Zeeman signature in the polarised spectra of a magnetic star, we usually “add” the contributions of numerous spectral lines...

We study the broadband emission of Mrk 501 using multiwavelength observations from 2017 to 2020 performed with a multitude of instruments, involving, among...

Previous detections of individual astrophysical sources of neutrinos are limited to the Sun and the supernova 1987A, whereas the origins of the diffuse flux of...

Aims.We made a seismic study of the young massive β Cephei star HD 203664 with the goal of constraining its interior structure.Methods.Our study is based on a...

Aims:We obtained the first long, homogenous time-series of V2104 Cyg, consisting of 679 datapoints, with the uvbyβ photometers of the Sierra Nevada and San...

We present MEGARA integral field unit (IFU) observations of five local type-2 quasars (QSO2s, z ∼ 0.1) from the Quasar Feedback (QSOFEED) sample. These active...

We study the multiphase feedback processes in the central ∼3 kpc of the barred Seyfert 2 galaxy NGC 5643. We used observations of the cold molecular gas (ALMA...

We present high resolution images and high dispersion spectra of the planetary nebula IC 4593. Benefiting from superb seeing (0″.4), the narrowband images...

On the basis of a large amount of high-precision photoelectric photometric data obtained at three sites and by use of the method of Fourier period analysis, the...