ABSTRACT HD 139614 is known to be a∼ 14-Myr-old, possibly pre-main-sequence star in
the Sco-Cen OB association in the Upper Centaurus-Lupus subgroup, with a slightly warped …

It has been suggested that β Pic b has a supersolar metallicity and subsolar C/O ratio.
Assuming solar carbon and oxygen abundances for the star β Pic and therefore the planet's …

Aims. We aim to provide observational constraints on diffusion models that predict peculiar
chemical abundances in the atmospheres of Am stars. We also intend to check if chemical …

Aims. Our goal is to explore the chemical pattern of early-type stars with planets, searching
for a possible signature of planet formation. In particular, we study a likely relation between …

The evolutionary status of the chemically peculiar class of λ Boo stars has been intensely
debated. It is now agreed that the λ Boo phenomenon affects A stars of all ages, from star …

The literature on the $\lambda $ Boo stars has grown to become somewhat heterogenous,
as different authors have applied different criteria across the UV, optical and infrared regions …

The λ Bootis stars are Population I, late B-to early F-type stars, with moderate to extreme (up
to a factor 100) surface underabundances of most Fe-peak elements and solar abundances …

We analyse TESS light curves for 70 southern λ Boo stars to identify binaries and to
determine which of them pulsate as δ Scuti stars. We find two heartbeat stars and two …

Context. Hyper-velocity stars are suggested to originate from the dynamical interaction of
binary stars with the supermassive black hole in the Galactic centre (GC), which accelerates …

The elemental abundances of 16 elements in the Vega-like and Doradus-type variable star
HD 218396 have been determined. A model atmosphere with, and a metallicity of was used …