296 citations · 5.4k across the 206 of their papers we have counts for
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A massive helium star with a sufficiently strong magnetic field to form a magnetar
T. Shenar, G. A. Wade, P. Marchant +13
Magnetars are highly magnetized neutron stars; their formation mechanism is unknown. Hot helium-rich stars with spectra dominated by emission lines are known as Wolf-Rayet stars. W…
Discovery of Magnetospheric Interactions in the Doubly-Magnetic Hot Binary Lupi
Ayan Biswas, Barnali Das, Poonam Chandra +6
Magnetic fields are extremely rare in close, hot binaries, with only 1.5\% of such systems known to contain a magnetic star. The eccentric Lupi system stands out in this popula…
Spectrum of the secondary component and new orbital elements of the massive triple star Delta Ori A
A. Oplištilová, P. Mayer, P. Harmanec +13
Orionis is the closest massive multiple stellar system and one of the brightest members of the Orion OB association. The primary (Aa1) is a unique evolved O star. In this work,…
Testing a scaling relation between coherent radio emission and physical parameters of hot magnetic stars
Barnali Das, Poonam Chandra, Matt E. Shultz +4
Coherent radio emission via electron cyclotron maser emission (ECME) from hot magnetic stars was discovered more than two decades ago, but the physical conditions that make the gen…
Ultraviolet Spectropolarimetry With Polstar: Using Polstar to test Magnetospheric Mass-loss Quenching
M. E. Shultz, R. Casini, M. C. M. Cheung +17
Polstar is a proposed NASA MIDEX space telescope that will provide high-resolution, simultaneous full-Stokes spectropolarimetry in the far ultraviolet, together with low-resolution…
The magnetic field of the chemically peculiar star V352Peg
L. Fréour, C. Neiner, J. D. Landstreet +2
We present a spectropolarimetric analysis of the hot star V352Peg. We have acquired 18 spectropolarimetric observations of the star with ESPaDOnS at the CFHT between 2018 and 2019…
First results of a magnetic survey of classical Cepheids
James A. Barron, Gregg A. Wade, Colin P. Folsom +1
We report recent ESPaDOnS and HARPSpol spectropolarimetric observations from our ongoing magnetic survey of the brightest twenty-five classical Cepheids. Stokes magnetic signat…
Ultraviolet Spectropolarimetry: Investigating stellar magnetic field diagnostics
C. P. Folsom, R. Ignace, C. Erba +9
Magnetic fields are important for stellar photospheres and magnetospheres, influencing photospheric physics and sculpting stellar winds. Observations of stellar magnetic fields are…
Ultraviolet Spectropolarimetric Diagnostics of Hot Star Magnetospheres
Asif ud-Doula, M. C. M. Cheung, A. David-Uraz +11
Several space missions and instruments for UV spectropolarimetry are in preparation, such as the proposed NASA MIDEX Polstar project, the proposed ESA M mission Arago, and the Poll…
MOBSTER -- VI. The crucial influence of rotation on the radio magnetospheres of hot stars
M. E. Shultz, S. P. Owocki, A. ud-Doula +13
Numerous magnetic hot stars exhibit gyrosynchrotron radio emission. The source electrons were previously thought to be accelerated to relativistic velocities in the current sheet f…
The magnetic field and magnetosphere of Plaskett's star: A fundamental shift in our understanding of the system
J. H. Grunhut, G. A. Wade, C. P. Folsom +7
Plaskett's "star" appears to be one of a small number of short-period binary systems known to contain a hot, massive, magnetic star. Building on the 2013 discovery investigation, w…
Five years of BRITE-Constellation photometry of the luminous blue variable P Cygni: properties of the stochastic low-frequency variability
Ashley Elliott, Noel D. Richardson, Herbert Pablo +9
Luminous Blue Variables (LBVs) are massive stars that are likely to be a transitionary phase between O stars and hydrogen-free classical Wolf-Rayet stars. The variability of these…
Discovery of eight 'Main-sequence Radio Pulse emitters' using the GMRT: clues to the onset of coherent radio emission in hot magnetic stars
Barnali Das, Poonam Chandra, Matt E. Shultz +6
'Main-sequence radio pulse-emitters' (MRPs) are magnetic early-type stars from which periodic radio pulses, produced via electron cyclotron maser emission (ECME), are observed. Des…
News from Gaia on sigma Ori E: a case study for the wind magnetic braking process
H. F. Song, G. Meynet, A. Maeder +8
Sigma Ori E, a massive helium B-type star, shows a high surface rotation and a strong surface magnetic field potentially challenging the process of wind magnetic braking. The Gaia…
Detecting the Zeeman effect in Massive Star Magnetospheres in the UV
C. Erba, V. Petit, K. Gayley +3
Approximately 7% of massive stars host stable surface magnetic fields that are strong enough to alter stellar evolution through their effect on the stellar wind. It is therefore cr…
Space Photometry with BRITE-Constellation
Weiss W. W, Zwintz K., Kuschnig R. +16
BRITE-Constellation is devoted to high-precision optical photometric monitoring of bright stars, distributed all over the Milky Way, in red and/or blue passbands. Photometry from s…
Confirmation of xi^1 CMa's ultra-slow rotation: magnetic polarity reversal and a dramatic change in magnetospheric UV emission lines
C. Erba, M. E. Shultz, V. Petit +5
The magnetic beta Cep pulsator xi^1 CMa has the longest rotational period of any known magnetic B-type star. It is also the only magnetic B-type star with magnetospheric emission t…
NGC 6611 601: A hot pre-main sequence spectroscopic binary containing a centrifugal magnetosphere host star
M. E. Shultz, E. Alecian, V. Petit +5
W 601 (NGC 6611 601) is one of the handful of known magnetic Herbig Ae/Be stars. We report the analysis of a large dataset of high-resolution spectropolarimetry. The star is a prev…
Eri: A bright pulsating magnetic Bp star in a 5.95-day double-lined spectroscopic binary
K. Woodcock, G. A. Wade, O. Kochukhov +2
Eri is a Bp star that was previously reported to be a single-lined spectroscopic binary. Using 17 ESPaDOnS spectropolarimetric (Stokes ) observations we identified the w…
Pollux: A weak dynamo-driven dipolar magnetic field and implications for its probable planet
M. Aurière, P. Petit, P. Mathias +7
Context: Pollux is considered as an archetype of a giant star hosting a planet. We then discovered a weak magnetic field at its surface using spectropolarimetry. Aims and Methods:…
New observations of NGC 1624-2 reveal a complex magnetospheric structure and underlying surface magnetic geometry
A. David-Uraz, V. Petit, M. E. Shultz +5
NGC 1624-2 is the most strongly magnetized O-type star known. Previous spectroscopic observations of this object in the ultraviolet provided evidence that it hosts a large and dens…
New BRITE-Constellation observations of the roAp star Alpha Circini
W. W. Weiss, H. -E. Fröhlich, T. Kallinger +11
Chemically peculiar (CP) stars with a measurable magnetic field comprise the group of mCP stars. The pulsating members define the subgroup of rapidly oscillating Ap (roAp) stars, o…
BRITE photometry and STELLA spectroscopy of bright stars in Auriga: Rotation, pulsation, orbits, and eclipses
K. G. Strassmeier, T. Granzer, M. Weber +7
Continuous photometry with up to three BRITE satellites was obtained for 12 targets and subjected to a period search. Contemporaneous high-resolution optical spectroscopy with STEL…
MOBSTER -- V: Discovery of a magnetic companion star to the magnetic Cep pulsator HD 156424
M. E. Shultz, Th. Rivinius, G. A. Wade +5
HD 156424 (B2 V) is a little-studied magnetic hot star in the Sco OB4 association, previously noted to display both high-frequency radial velocity (RV) variability and magnetospher…