The magnetic chemically peculiar (mCP) stars of the upper main sequence exhibit strong,
globally organized magnetic fields that are inclined to the rotational axis and facilitate the …

We present the classification of 197 point sources observed with the Infrared Spectrograph
in the SAGE-Spec Legacy programme on the Spitzer Space Telescope. We introduce a …

Aims. The determination of effective temperature for chemically peculiar (CP) stars by means
of photometry is a sophisticated task due to their abnormal colours. Standard calibrations for …

Aims. To reconcile the measurements of 3 He/H in Galactic HII regions with high values of 3
He in a couple of planetary nebulae, we propose that thermohaline mixing is inhibited by a …

Context. The galactic magnetic chemically peculiar (mCP) stars of the upper main sequence
are well known as periodic spectral and light variables. The observed variability is obviously …

The chemically peculiar (CP) stars of the upper main sequence are perfect tracers for
several astrophysical processes. Their study especially in open clusters further helps to …

Globular clusters are main astrophysical laboratories to test and modify evolutionary models.
Thought to be rather homogeneous in their local elemental distribution of members, results …

In this review, I will summarise what we know about magnetic fields in stars and what the
origin of these magnetic fields may be. I will address the issue of whether the magnetic flux …

The study of chemically peculiar (CP) stars in open clusters provides valuable information
about their evolutionary status. Their detection can be performed using the Δa photometric …

We discuss the presence of magnetic peculiar stars in open clusters on the basis of
photometric identification, in a sample that covers not only the solar neighbourhood but also …