The Herschel Extragalactic Legacy Project (HELP) focuses to publish an astronomical multiwavelength catalogue of millions of objects over 1300 deg 2 of the Herschel Space Observatory survey fields. Millions of galaxies with ultraviolet-far infrared photometry make HELP a perfect sample for testing spectral energy distribution fitting models, and to

Lithium in stars more massive than ∼6 M ☉ is expected to be totally depleted by the time when the stars reach the He core burning phase, as a consequence of rotationally induced mixing and other mechanisms. Some massive AGB stars present very high lithium abundances, a phenomenon explained by the activation of the Cameron-Fowler mechanism during

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

While most of the exoplanets have been found orbiting around solar-type stars, low-mass stars have recently been recognized as ideal exo-life laboratory. Currently, stellar activity is one of the limiting factors for the characterization of Earth-twins and for assessing their habitability: understanding the activity of M dwarfs is thus crucial. In

The early evolution of Sun-like stars may be interspersed by energetic FU Orionis (FUor) type accretion outbursts. We analysed eight years of photometric and spectroscopic variability of V582 Aur, a bona fide FUor, in outburst. While the accretion rate derived from near-infrared measurements was constant, radical brightness changes occurred due to

About 1 out of 200 Sun-like stars has a planet with an orbital period shorter than one day: an ultrashort-period planet 1,2. All of the previously known ultrashort-period planets are either hot Jupiters, with sizes above 10 Earth radii (R ⊕), or apparently rocky planets smaller than 2 R ⊕. Such lack of planets of intermediate size (the `hot Neptune