Publications (30)
Confirmation of the magnetic oblique rotator model for the Of?p star HD 191612
G. A. Wade, I. D. Howarth, R. H. D. Townsend +11
This paper reports high-precision Stokes V spectra of HD 191612 acquired using the ESPaDOnS spectropolarimeter at the Canada-France-Hawaii Telescope, in the context of the Magnetis…
Detection of magnetic fields in both B-type components of the Lupi system: a new constraint on the origin of fossil fields?
M. Shultz, G. A. Wade, E. Alecian +1
High-resolution circular spectropolarimetric observations, obtained with ESPaDOnS in the context of the BinaMIcS Large Program, have revealed a magnetic field in the B3V secondary…
Deep Photospheric Emission Lines as Probes for Pulsational Waves
Th. Rivinius, M. Shultz, G. A. Wade
Weak line emission originating in the photosphere is well known from O stars and widely used for luminosity classification. The physical origin of the line emission are NLTE effect…
Evolving pulsation of the slowly rotating magnetic Cep star CMa
G. A. Wade, A. Pigulski, S. Begy +11
Recent BRITE-Constellation space photometry of the slowly rotating, magnetic Cep pulsator CMa permits a new analysis of its pulsation properties. Analysis of the two-co…
HD 156324: a tidally locked magnetic triple spectroscopic binary with a disrupted magnetosphere
M. Shultz, Th. Rivinius, G. A. Wade +3
HD 156324 is an SB3 (B2V/B5V/B5V) system in the Sco OB4 association. The He-strong primary possesses both a strong magnetic field, and H emission believed to originate in its C…
The pulsating magnetosphere of the extremely slowly rotating magnetic Cep star CMa
M. Shultz, G. A. Wade, Th. Rivinius +4
CMa is a monoperiodically pulsating, magnetic Cep star with magnetospheric X-ray emission which, uniquely amongst magnetic stars, is clearly modulated with the star's p…
HD 164492C: a rapidly-rotating, H-bright, magnetic early B star associated with a 12.5d spectroscopic binary
G. A. Wade, M. Shultz, J. Sikora +6
We employ high resolution spectroscopy and spectropolarimetry to derive the physical properties and magnetic characteristics of the multiple system HD 164492C, located in the young…
The constant magnetic field of xi 1 CMa: geometry or slow rotation?
C. Fourtune-Ravard, G. A. Wade, W. Marcolino +4
We report recent observations of the sharp-lined magnetic beta Cep pulsator xi 1 CMa (= HD 46328). The longitudinal magnetic field of this star is detected consistently, but it is…
Magnetic B stars observed with BRITE: Spots, magnetospheres, binarity, and pulsations
G. A. Wade, D. H. Cohen, C. Fletcher +16
Magnetic B-type stars exhibit photometric variability due to diverse causes, and consequently on a variety of timescales. In this paper we describe interpretation of BRITE photomet…
Investigating the Magnetospheres of Rapidly Rotating B-type Stars
C. L. Fletcher, V. Petit, Y. Naze +6
Recent spectropolarimetric surveys of bright, hot stars have found that ~10% of OB-type stars contain strong (mostly dipolar) surface magnetic fields (~kG). The prominent paradigm…
Spin transition in GdN@C, detected by low-temperature on-chip SQUID technique
L. Chen, E. E. Carpenter, C. S. Hellberg +4
We present a magnetic study of the GdN@C molecule, consisting of a Gd-trimer via a Nitrogen atom, encapsulated in a C cage. This molecular system can be an effici…
Magnetism of the He-weak star HR2949
Th. Rivinius, G. Wade, R. H. D. Townsend +4
A magnetic field and rotational line profile variability (lpv) is found in the He-weak star HR2949. The field measured from metallic lines varies in a clearly non-sinusoidal way, a…
Confirming the oblique rotator model for the extremely slowly rotating O8f?p star HD 108
M. Shultz, G. A. Wade
The O8f?p star HD 108 is implied to have experienced the most extreme rotational braking of any magnetic, massive star, with a rotational period of at least 55 years,…
Searching for Weak or Complex Magnetic Fields in Polarized Spectra of Rigel
M. Shultz, G. A. Wade, C. Neiner +6
Seventy-eight high-resolution Stokes V, Q and U spectra of the B8Iae supergiant Rigel were obtained with the ESPaDOnS spectropolarimeter at CFHT and its clone NARVAL at TBL in the…
The magnetic field and spectral variability of the He-weak star HR 2949
M. Shultz, Th. Rivinius, C. P. Folsom +6
We analyze a high resolution spectropolarimetric dataset collected for the He-weak B3p IV star HR 2949. The Zeeman effect is visible in the circularly polarized component of numero…
Magnetic field topologies of the bright, weak-field Ap stars theta Aurigae and epsilon Ursae Majoris
O. Kochukhov, M. Shultz, C. Neiner
The brightest magnetic chemically peculiar stars theta Aur and eps UMa were targeted by numerous studies of their photometric and spectroscopic variability. Detailed maps of chemic…
Discovery of a magnetic field in the rapidly-rotating O-type secondary of the colliding-wind binary HD 47129 (Plaskett's star)
J. H. Grunhut, G. A. Wade, M. Leutenegger +14
We report the detection of a strong, organized magnetic field in the secondary component of the massive O8III/I+O7.5V/III double-lined spectroscopic binary system HD 47129 (Plasket…
The MiMeS Project: Overview and Current Status
G. A. Wade, E. Alecian, D. A. Bohlender +18
The Magnetism in Massive Stars (MiMeS) Project is a consensus collaboration among many of the foremost international researchers of the physics of hot, massive stars, with the basi…
An Analysis of the Rapidly Rotating Bp Star HD 133880
J. D. Bailey, J. Grunhut, M. Shultz +8
HD 133880 is a rapidly rotating Bp star and host to one of the strongest magnetic fields of any Bp star. A member of the Upper Centaurus Lupus association, it is a star with a well…
Investigating the origin of cyclical wind variability in hot, massive stars - I. On the dipolar magnetic field hypothesis
A. David-Uraz, G. A. Wade, V. Petit +9
OB stars exhibit various types of spectral variability associated with wind structures, including the apparently ubiquitous discrete absorption components (DACs). These are propose…
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…
NU Ori: a hierarchical triple system with a strongly magnetic B-type star
M. Shultz, J. -B. Le Bouquin, Th. Rivinius +13
NU Ori is a massive spectroscopic and visual binary in the Orion Nebula Cluster, with 4 components: Aa, Ab, B, and C. The B0.5 primary (Aa) is one of the most massive B-type stars…
Lupi: measuring the heartbeat of a doubly-magnetic massive binary with BRITE-Constellation
H. Pablo, M. Shultz, J. Fuller +15
Lupi A is a binary system consisting of two main sequence early B-type stars Aa and Ab in a short period, moderately eccentric orbit. The close binary pair is the onl…
The pulsationally modulated radial crossover signature of the slowly rotating magnetic B-type star CMa
M. Shultz, O. Kochukhov, G. A. Wade +1
We report the latest set of spectropolarimetric observations of the magnetic Cep star CMa. The new observations confirm the long-period model of Shultz et al.\ (2017),…
The accelerating rotation of the magnetic He-weak star HD 142990
M. Shultz, Th. Rivinius, B. Das +2
HD 142990 (V 913 Sco; B5 V) is a He-weak star with a strong surface magnetic field and a short rotation period ( d). While it is clearly a rapid rotator, recent…
New Observations of the Strongly Magnetic O-star NGC 1624-2 Reveal Its Magnetic South Pole
S. Seadrow, V. Petit, D. Bohlender +6
NCG 1624-2 has the strongest detected magnetic field of all known main-sequence O-type stars. It was originally found that its magnetospheric emission lines followed a 5 mont…
NGC 1624-2: A slowly rotating, X-ray luminous Of?cp star with an extraordinarily strong magnetic field
G. A. Wade, J. MaÃz Apellániz, F. Martins +16
This paper presents a first observational investigation of the faint Of?cp star NGC 1624-2, yielding important new constraints on its spectral and physical characteristics, rotatio…
An Observational Evaluation of Magnetic Confinement in the Winds of BA Supergiants
M. Shultz, G. A. Wade, V. Petit +4
Magnetic wind confinement has been proposed as one explanation for the complex wind structures of supergiant stars of spectral types B and A. Observational investigation of this hy…
The surface magnetic field and chemical abundance distributions of the B2V helium-strong star HD184927
I. Yakunin, G. Wade, D. Bohlender +8
A new time series of high-resolution Stokes I and V spectra of the magnetic B2V star HD 184927 has been obtained in the context of the Magnetism in Massive Stars (MiMeS) Large Prog…
Critical evaluation of magnetic field detections reported for pulsating B-type stars in the light of ESPaDOnS, Narval and reanalyzed FORS1/2 observations
M. Shultz, G. A. Wade, J. Grunhut +6
Recent spectropolarimetric studies of 7 SPB and Cep stars have suggested that photospheric magnetic fields are more common in B-type pulsators than in the general population o…