S. Hubrig
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View article: The incidence of magnetism in blue and yellow straggler stars
The incidence of magnetism in blue and yellow straggler stars Open
Our understanding of the generation of magnetic fields in intermediate-mass and massive OBA stars remains limited. Some theories have proposed that their magnetic fields could be a result of strong binary interactions, including stellar me…
View article: The incidence of magnetism in blue and yellow straggler stars
The incidence of magnetism in blue and yellow straggler stars Open
Context . Our understanding of the generation of magnetic fields in intermediate-mass and massive OBA stars remains limited. Some theories have proposed that their magnetic fields could be a result of strong binary interactions, including …
View article: A magnetic tertiary in the most massive compact triple-star system
A magnetic tertiary in the most massive compact triple-star system Open
The system TIC 470710327 is comprised of three main-sequence OB stars, with an inner compact 1.10 d eclipsing binary and a non-eclipsing tertiary on a 52.04 d orbit. With the tertiary mass of 14.5-16 $M_{\odot}$ and both components in the …
View article: A magnetic tertiary in the most massive compact triple-star system
A magnetic tertiary in the most massive compact triple-star system Open
The system TIC 470710327 is comprised of three main-sequence OB stars, with an inner compact 1.10 d eclipsing binary and a non-eclipsing tertiary on a 52.04 d orbit. With the tertiary mass of 14.5–16 ${\rm M}_{\odot }$ and both components …
View article: Spectral Variability of Herbig Ae Star V1295, Aquila
Spectral Variability of Herbig Ae Star V1295, Aquila Open
This article presents the results of long-term spectral studies of the unusual Herbig Ae star V1295 Aql. The variability in the spectrophotometric parameters of the emission and absorption components of the hydrogen lines Hα, Hβ, and D Na …
View article: First snapshot of a magnetosphere around a Herbig Ae/Be star
First snapshot of a magnetosphere around a Herbig Ae/Be star Open
The Herbig Ae/Be star HD190073 is one of the very few magnetic Herbig Ae/Be stars for which close low-mass companions have been reported. Previously published magnetic field measurements indicated an annual change in the field configuratio…
View article: First snapshot of a magnetosphere around a Herbig Ae/Be star
First snapshot of a magnetosphere around a Herbig Ae/Be star Open
Context. The Herbig Ae/Be star HD 190073 is one of the very few magnetic Herbig Ae/Be stars for which close low-mass companions have been reported. Previously published magnetic field measurements indicated an annual change in the field co…
View article: Magnetic field of the roAp star KIC 10685175: Observations versus theory
Magnetic field of the roAp star KIC 10685175: Observations versus theory Open
Context . KIC 10685175 is a roAp star whose polar magnetic field is predicted to be 6 kG through a nonadiabatic axisymmetric pulsation theoretical model. Aims . In this work, we aim to measure the magnetic field strength of KIC 10685175 us…
View article: Magnetic massive stars: confirming the merger scenario for the magnetic field generation
Magnetic massive stars: confirming the merger scenario for the magnetic field generation Open
Magnetic fields are considered to be key components of massive stars, with a far-reaching impact on their evolution and ultimate fate. A magnetic mechanism was suggested for the collimated explosion of massive stars, relevant for long-dura…
View article: TESS Detections of Pulsations in Of?p Stars in the Magellanic Clouds
TESS Detections of Pulsations in Of?p Stars in the Magellanic Clouds Open
We used Transiting Exoplanet Survey Satellite observations to search for pulsations in six known Of?p stars in the Magellanic Clouds. We find evidence for pulsational variability in three Of?p stars: UCAC4 115-008604, OGLE SMC-SC6 237339, …
View article: TESS detections of pulsations in Of?p stars in the Magellanic Clouds
TESS detections of pulsations in Of?p stars in the Magellanic Clouds Open
We used TESS observations to search for pulsations in six known Of?p stars in the Magellanic Clouds. We find evidence for pulsational variability in three Of?p stars: UCAC4 115-008604, OGLE SMC-SC6 237339, and AzV 220. Two of them, UCAC4 1…
View article: Magnetic field of the roAp star KIC~10685175: observations versus theory
Magnetic field of the roAp star KIC~10685175: observations versus theory Open
KIC 10685175 is a roAp star whose polar magnetic field is predicted to be 6 kG through a non-adiabatic axisymmetric pulsation theoretical model. In this work, we aim to measure the magnetic field strength of KIC 10685175 using high-resolut…
View article: High-resolution spectroscopy of the variable hot post-AGB star LS 4331 (IRAS 17381-1616)
High-resolution spectroscopy of the variable hot post-AGB star LS 4331 (IRAS 17381-1616) Open
An analysis of high-resolution ($R\sim48\,000$) optical spectrum of hot (B1Ibe) post-AGB star LS 4331 (IRAS 17381-1616) is presented. The detailed identification of the observed absorption and emission features in the wavelength range 3700…
View article: Extreme magnetic field modulus variability of the Bp star HD 57372
Extreme magnetic field modulus variability of the Bp star HD 57372 Open
Context . In chemically peculiar Ap/Bp stars with large-scale organised magnetic fields of simple centred dipole configuration, the ratio between the maximum and the minimum of the mean magnetic field modulus is on the order of 1.25. Value…
View article: Extreme Magnetic Field Modulus Variability of the Bp star HD 57372
Extreme Magnetic Field Modulus Variability of the Bp star HD 57372 Open
Context. In chemically peculiar Ap/Bp stars with large-scale organised magnetic fields with a simple centred dipole configuration, the ratio between the maximum and the minimum of the mean magnetic field modulus is of the order of 1.25. Va…
View article: Detection of extragalactic magnetic massive stars
Detection of extragalactic magnetic massive stars Open
Context. Studies of the magnetic characteristics of massive stars have recently received significant attention because they are progenitors of highly magnetised compact objects. Stars initially more massive than about 8 M ⊙ leave behind ne…
View article: Characterizing the dynamical magnetosphere of the extremely slowly rotating magnetic <scp>O9</scp>.7 V star <scp>HD</scp> 54879 using rotational modulation of the H<i>α</i> profile
Characterizing the dynamical magnetosphere of the extremely slowly rotating magnetic <span>O9</span>.7 V star <span>HD</span> 54879 using rotational modulation of the H<i>α</i> profile Open
The magnetic field in the O9.7 V star HD 54879 has been monitored for almost a decade. Spectropolarimetric observations reveal a rather strong mean longitudinal magnetic field that varies with a period of about 7.41 years. Observations in …
View article: Characterizing the dynamical magnetosphere of the extremely slowly rotating magnetic O9.7 V star HD 54879 using rotational modulation of the H $α$ profile
Characterizing the dynamical magnetosphere of the extremely slowly rotating magnetic O9.7 V star HD 54879 using rotational modulation of the H $α$ profile Open
The magnetic field in the O9.7 V star HD54879 has been monitored for almost a decade. Spectropolarimetric observations reveal a rather strong mean longitudinal magnetic field that varies with a period of about 7.41 yr. Observations in the …
View article: Testing pulsation diagnostics in the rapidly oscillating magnetic Ap star γ Equ using near-infrared CRIRES+ observations
Testing pulsation diagnostics in the rapidly oscillating magnetic Ap star γ Equ using near-infrared CRIRES+ observations Open
Context. Pulsations of rapidly oscillating Ap stars and their interaction with the stellar magnetic field have not been studied in the near-infrared (near-IR) region despite the benefits these observations offer compared to visual waveleng…
View article: Searching for magnetic fields in pulsating A-type stars: the discovery of a strong field in the probable δ Sct star HD 340577 and a null result for the γ Dor star HR 8799
Searching for magnetic fields in pulsating A-type stars: the discovery of a strong field in the probable δ Sct star HD 340577 and a null result for the γ Dor star HR 8799 Open
Numerous δ Sct and γ Dor pulsators are identified in the region of the Hertzsprung–Russell diagram that is occupied by chemically peculiar magnetic Ap stars. The connection between δ Sct and γ Dor pulsations and the magnetic field in Ap st…
View article: The magnetic, spectroscopic, and photometric variability of the Wolf-Rayet star WR55
The magnetic, spectroscopic, and photometric variability of the Wolf-Rayet star WR55 Open
Studies of magnetic fields in the most evolved massive stars, the Wolf-Rayet stars, are of special importance because they are progenitors of certain types of supernovae. The first detection of a magnetic field of the order of a few hundre…
View article: The magnetic, spectroscopic, and photometric variability of the Wolf–Rayet star WR 55
The magnetic, spectroscopic, and photometric variability of the Wolf–Rayet star WR 55 Open
Studies of magnetic fields in the most evolved massive stars, the Wolf–Rayet stars, are of special importance because they are progenitors of certain types of supernovae. The first detection of a magnetic field of the order of a few hundre…
View article: Confident detection of doubly ionized thorium in the extreme Ap star CPD-62° 2717
Confident detection of doubly ionized thorium in the extreme Ap star CPD-62° 2717 Open
Despite the Universe containing primordial thorium (Th) of sufficient abundance to appear in stellar spectra, detection of Th has to date been tentative and based on just a few weak and blended lines. Here, we present convincing evidence n…
View article: Confident Detection of Doubly-Ionized Thorium in the Extreme Ap Star CPD-62 2717
Confident Detection of Doubly-Ionized Thorium in the Extreme Ap Star CPD-62 2717 Open
Despite the universe containing primordial thorium (Th) of sufficient abundance to appear in stellar spectra, detection of Th has to date been tentative and based on just a few weak and blended lines. Here, we present convincing evidence n…
View article: Are magnetic fields universal in O-type multiple systems?
Are magnetic fields universal in O-type multiple systems? Open
Although significant progress has been achieved in recent surveys of the magnetism in massive stars, the origin of the detected magnetic fields remains to be the least understood topic in their studies. We present an analysis of 61 high-re…
View article: Trumpler 16-26: a new centrifugal magnetosphere star discovered via SDSS/APOGEE <i>H</i>-band spectroscopy
Trumpler 16-26: a new centrifugal magnetosphere star discovered via SDSS/APOGEE <i>H</i>-band spectroscopy Open
We report the discovery of a new example of the rare class of highly magnetized, rapidly rotating, helium enhanced, early B stars that produce anomalously wide hydrogen emission due to a centrifugal magnetosphere (CM). The star is Trumpler…
View article: Trumpler 16-26: A New Centrifugal Magnetosphere Discovered via SDSS/APOGEE H-band Spectroscopy
Trumpler 16-26: A New Centrifugal Magnetosphere Discovered via SDSS/APOGEE H-band Spectroscopy Open
We report the discovery of a new example of the rare class of highly magnetized, rapidly rotating, helium enhanced, early B stars that produce anomalously wide hydrogen emission due to a centrifugal magnetosphere (CM). The star is Trumpler…
View article: Magnetic field measurements of sharp-lined Ap stars
Magnetic field measurements of sharp-lined Ap stars Open
Previous observations suggested that Ap and Bp stars exhibit a bimodal distribution of surface magnetic field strengths and that actually only few or no stars exist with magnetic dipole field strengths below 300 G down to a few Gauss. As t…
View article: Seismic modelling of the pulsating mercury–manganese star HD 29589
Seismic modelling of the pulsating mercury–manganese star HD 29589 Open
Photometric and spectroscopic time-series of chemically peculiar mercury–manganese (HgMn) stars show variability, which in most cases is interpreted as the effect of binarity or surface spots. Until recently, pulsations have not been detec…
View article: The evolutionary state of the chemically peculiar members of the open cluster NGC 2516
The evolutionary state of the chemically peculiar members of the open cluster NGC 2516 Open
We aim at establishing safe membership and evolutionary status of 11 chemically peculiar (CP) stars that are residing in the domain of the open cluster NGC 2516 and are frequently referred to as cluster members. We queried the Gaia EDR3 ca…