Spectroscopic survey of Kepler stars. I. HERMES/Mercator observations of A- and F-type stars
The Kepler space mission provided near-continuous and high-precision photometry of about
207 000 stars, which can be used for asteroseismology. However, for successful seismic …
207 000 stars, which can be used for asteroseismology. However, for successful seismic …
The ages of a-stars. I. Interferometric observations and age estimates for stars in the ursa major moving group
We have observed and spatially resolved a set of seven A-type stars in the nearby Ursa
Major moving group with the Classic, CLIMB, and PAVO beam combiners on the Center for …
Major moving group with the Classic, CLIMB, and PAVO beam combiners on the Center for …
Non-LTE abundance analysis of AB stars with low rotational velocities–II. Do AB stars with normal abundances exist?
AM Romanovskaya, TA Ryabchikova… - Monthly Notices of …, 2023 - academic.oup.com
We present chemical composition and fundamental parameters (the effective temperature,
surface gravity, and radius) for four sharp-lined A-type stars γ Gem (HD 41705), o Peg (HD …
surface gravity, and radius) for four sharp-lined A-type stars γ Gem (HD 41705), o Peg (HD …
Testing the fossil field hypothesis: could strongly magnetized OB stars produce all known magnetars?
EI Makarenko, AP Igoshev… - Monthly Notices of the …, 2021 - academic.oup.com
Stars of spectral types O and B produce neutron stars (NSs) after supernova explosions.
Most of NSs are strongly magnetized including normal radio pulsars with B∝ 1012 G and …
Most of NSs are strongly magnetized including normal radio pulsars with B∝ 1012 G and …
Photometric determination of rotation axis inclination, rotation rate, and mass of rapidly rotating intermediate-mass stars
A Lazzarotto, A Hui-Bon-Hoa, M Rieutord - Astronomy & Astrophysics, 2023 - aanda.org
Context. Intermediate-mass stars are often fast rotators, and hence are centrifugally flattened
and notably affected by gravity darkening. To analyse this kind of stars properly, one must …
and notably affected by gravity darkening. To analyse this kind of stars properly, one must …
Influence of departures from LTE on determinations of the scandium abundances in A–B-type stars
L Mashonkina - Monthly Notices of the Royal Astronomical …, 2024 - academic.oup.com
We developed a comprehensive model atom of Sc ii–Sc iii. Abundances of scandium for a
sample of eight unevolved A9–B3-type stars with well-determined atmospheric parameters …
sample of eight unevolved A9–B3-type stars with well-determined atmospheric parameters …
High-resolution spectroscopy of the hot Am star HR 3383
GM Wahlgren, KE Nielsen… - Monthly Notices of the …, 2021 - academic.oup.com
We present the spectrum analysis of the hot Am star HR 3383 (A1 Vm). Hubble Space
Telescope STIS and Nordic Optical Telescope SOFIN data are modelled with synthetic …
Telescope STIS and Nordic Optical Telescope SOFIN data are modelled with synthetic …
The behaviour of lithium at high metallicity in the Milky Way-Selection effects in the samples and the possible role of atomic diffusion
C Charbonnel, S Borisov, P De Laverny… - Astronomy & …, 2021 - aanda.org
Aims. We revisit large spectroscopic data sets for field stars from the literature to derive the
upper Li envelope in the high metallicity regime in our Galaxy. Methods. We take advantage …
upper Li envelope in the high metallicity regime in our Galaxy. Methods. We take advantage …
What CoRoT tells us about δ Scuti stars-Existence of a regular pattern and seismic indices to characterize stars
E Michel, MA Dupret, D Reese… - EPJ Web of …, 2017 - epj-conferences.org
Inspired by the so appealing example of red giants, where going from a handful of stars to
thousands revealed the structure of the eigenspectrum, we inspected a large homogeneous …
thousands revealed the structure of the eigenspectrum, we inspected a large homogeneous …
Chemical diversity among A–B stars with low rotational velocities: non-LTE abundance analysis
L Mashonkina, T Ryabchikova… - Monthly Notices of …, 2020 - academic.oup.com
We present accurate element abundance patterns based on the non-local thermodynamic
equilibrium (non-LTE, NLTE) line formation for 14 chemical elements from He to Nd for a …
equilibrium (non-LTE, NLTE) line formation for 14 chemical elements from He to Nd for a …