Ap stars with resolved magnetically split lines: Magnetic field determinations from Stokes I and V spectra

G Mathys - Astronomy & Astrophysics, 2017 - aanda.org
Context. Some Ap stars that have a strong enough magnetic field and a sufficiently low v sini
show spectral lines resolved into their magnetically split components. Aims. We present the …

Rotation and pulsation in Ap stars: first light results from TESS sectors 1 and 2

MS Cunha, V Antoci, DL Holdsworth… - Monthly Notices of …, 2019 - academic.oup.com
We present the first results from the Transiting Exoplanet Survey Satellite (TESS) on the
rotational and pulsational variability of magnetic chemically peculiar A-type stars. We …

A volume-limited survey of mCP stars within 100 pc–I. Fundamental parameters and chemical abundances

J Sikora, GA Wade, J Power… - Monthly Notices of the …, 2019 - academic.oup.com
We present the first results of a volume-limited survey of main-sequence (MS) magnetic
chemically peculiar (mCP) stars. The sample consists of all identified intermediate-mass MS …

On the first δ Sct–roAp hybrid pulsator and the stability of p and g modes in chemically peculiar A/F stars

SJ Murphy, H Saio, M Takada-Hidai… - Monthly Notices of …, 2020 - academic.oup.com
Strong magnetic fields in chemically peculiar A-type (Ap) stars typically suppress low-
overtone pressure modes (p modes) but allow high-overtone p modes to be driven. KIC …

TESS cycle 1 observations of roAp stars with 2-min cadence data

DL Holdsworth, MS Cunha, DW Kurtz… - Monthly Notices of …, 2021 - academic.oup.com
We present the results of a systematic search for new rapidly oscillating Ap (roAp) stars
using the 2-min cadence data collected by the Transiting Exoplanet Survey Satellite (TESS) …

Transition probabilities of near-infrared Ce III lines from stellar spectra: applications to kilonovae

N Domoto, JJ Lee, M Tanaka, HG Lee… - The Astrophysical …, 2023 - iopscience.iop.org
Kilonova spectra provide us with information of r-process nucleosynthesis in neutron star
mergers. However, it is still challenging to identify individual elements in the spectra mainly …

Revisiting the pulsational characteristics of the exoplanet host star β Pictoris

K Zwintz, DR Reese, C Neiner, A Pigulski… - Astronomy & …, 2019 - aanda.org
Context. Exoplanet properties crucially depend on the parameters of their host stars: more
accurate stellar parameters yield more accurate exoplanet characteristics. When the …

KIC 4768731: a bright long-period roAp star in the Kepler field

B Smalley, E Niemczura, SJ Murphy… - Monthly Notices of …, 2015 - academic.oup.com
We report the identification of 61.45 d− 1 (711.2 μHz) oscillations, with amplitudes of 62.6
μmag, in KIC 4768731 (HD 225914) using Kepler photometry. This relatively bright (V= 9.17) …

Chemically peculiar stars and their temperature calibration

M Netopil, E Paunzen, HM Maitzen, P North… - Astronomy & …, 2008 - aanda.org
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 …

Chemical stratification in the atmosphere of Ap star HD 133792-Regularized solution of the vertical inversion problem

O Kochukhov, V Tsymbal, T Ryabchikova… - Astronomy & …, 2006 - aanda.org
Context. High spectral resolution studies of cool Ap stars reveal conspicuous anomalies of
the shape and strength of many absorption lines. This is a signature of large atmospheric …