107 citations · 303 across the 16 of their papers we have counts for
16 papers · 1 filter
Magnetic field, rotation, and binarity of the first magnetic B[e] star, IRAS 17449+2320
I. Bermejo Lozano, G. A. Wade, C. P. Folsom +1
IRAS 17449+2320 is the first identified magnetic B[e] star. It belongs to a subgroup of peculiar hot B-type stars, called FS~CMa stars. presenting the B[e] phenomenon, i.e., permit…
GMRT Survey of Radio Emission from Magnetic Massive Stars -- I: Emission from Single Stars at sub-GHz Frequencies
Ayan Biswas, Gregg A. Wade, Barnali Das +2
With the growing subset of magnetic massive stars, it is now possible to conduct a systematic survey of radio emission from magnetic hot stars to better understand the underlying e…
The rotational and magnetic properties of Polaris from long-term spectropolarimetric monitoring
James A. Barron, Gregg A. Wade, Colin P. Folsom
Polaris is a highly unusual Cepheid with observed properties that are difficult to reconcile with stellar evolutionary models. Since the initial detection of Polaris' magnetic fiel…
Discovery of a rapidly evolving global magnetic field in the M-dwarf YZ Cet and constraints on the magnetic field of its planet YZ Cet b
Ayan Biswas, Colin P. Folsom, James A. Barron +3
We present a spectropolarimetric study of the nearby M4.5V exoplanet host star YZ Cet, based on near-infrared observations obtained with the SpectroPolarimètre InfraRouge (SPIRou)…
A search for chemical stratification and magnetic fields in eight field blue horizontal-branch stars
Issouf Kafando, Gregg Wade, Alexandre David-Uraz +2
In this article, we present the results of an analysis of chemical abundances and a search for magnetic fields in eight field blue horizontal-branch (BHB) stars: BD\,+010…
Magnetic field monitoring of four massive A-F supergiants
Gregg Wade, Mary Oksala, Coralie Neiner +2
We report magnetic field measurements spanning about 15 years of four massive () supergiant stars: Per (HD\,20902, F5Iab), Lep (HD\,36673A, F0Ib), Leo (…
Monitoring the large-scale magnetic field of AD~Leo with SPIRou, ESPaDOnS and Narval. Toward a magnetic polarity reversal?
S. Bellotti, J. Morin, L. T. Lehmann +23
One manifestation of dynamo action on the Sun is the 22-yr magnetic cycle, exhibiting a polarity reversal and a periodic conversion between poloidal and toroidal fields. For M dwar…
First results from the LIFE project: discovery of two magnetic hot evolved stars
A. J. Martin, C. Neiner, M. E. Oksala +6
We present the initial results of the Large Impact of magnetic Fields on the Evolution of hot stars (LIFE) project. The focus of this project is the search for magnetic fields in e…
Detection of ultra-weak magnetic fields in Am stars: beta UMa and theta Leo
A. Blazère, P. Petit, F. Lignières +9
An extremely weak circularly polarized signature was recently discovered in spectral lines of the chemically peculiar Am star Sirius A. A weak surface magnetic field was proposed t…
First detections of 610 MHz radio emission from hot magnetic stars
P. Chandra, G. A. Wade, J. O. Sundqvist +7
We have carried out a study of radio emission from a small sample of magnetic O- and B-type stars using the Giant Metrewave Radio Telescope, with the goal of investigating their ma…
The Magnetic Fields at the Surface of Active Single G-K Giants
M. Aurière, R. Konstantinova-Antova, C. Charbonnel +15
We investigate the magnetic field at the surface of 48 red giants selected as promising for detection of Stokes V Zeeman signatures in their spectral lines. We use the spectropolar…
Ultra weak magnetic fields in Am stars: Beta UMa and theta Leo
Aurore Blazère, Pascal Petit, François Lignières +3
An extremely weak circularly-polarized signature was recently discovered in spectral lines of the chemically peculiar Am star Sirius A (Petit et al. 2011). This signal was interpre…
A search for weak or complex magnetic fields in the the B3V star iota Herculis
G. A. Wade, C. P. Folsom, P. Petit +4
We obtained 128 high signal-to-noise ratio Stokes spectra of the B3V star ~Her on 5 consecutive nights in 2012 with the ESPaDOnS spectropolarimeter at the Canada-France-Hawa…
Chemical peculiarities in magnetic and non-magnetic pre-main sequence A and B stars
C. P. Folsom, S. Bagnulo, G. A. Wade +2
In A- and late B-type stars, strong magnetic fields are always associated with Ap and Bp chemical peculiarities. However, it is not clear at what point in a star's evolution those…
Descendants of Magnetic and non-Magnetic A-type Stars
M. Auriere, F. Lignieres, R. Konstantinova-Antova +4
We have studied the magnetic field of about 50 active and non-active single G-K-type red giants by means of spectropolarimetry with Narval and ESPaDOnS. 30 giants have been signifi…
Magnetic field structure in single late-type giants: Beta Ceti in 2010 - 2012
S. Tsvetkova, P. Petit, M. Auriere +5
The data were obtained using two spectropolarimeters - Narval at the Bernard Lyot Telescope, Pic du Midi, France, and ESPaDOnS at CFHT, Hawaii. Thirty-eight circularly-polarized sp…