Spectral variations of of?p oblique magnetic rotator candidates in the magellanic clouds

DOI: 
10.1088/0004-6256/150/4/99
Publication date: 
01/10/2015
Main author: 
Walborn N.R.
IAA authors: 
Sota A.
Authors: 
Walborn N.R., Morrell N.I., Nazé Y., Wade G.A., Bagnulo S., Barbá R.H., Apellániz J.M., Howarth I.D., Evans C.J., Sota A.
Journal: 
Astronomical Journal
Publication type: 
Article
Volume: 
150
Pages: 
Number: 
99
Abstract: 
Optical spectroscopic monitoring has been conducted of two O stars in the SMC and one in the LMC, the spectral characteristics of which place them in the Of?p category, which has been established in the Galaxy to consist of oblique magnetic rotators. All of these Magellanic stars show systematic spectral variations typical of the Of?p class, further strengthening their magnetic candidacy to the point of virtual certainty. The spectral variations are related to photometric variations derived from Optical Gravitational Lensing Experiment data by Nazé et al. in a parallel study, which yields rotational periods for two of them. Now circular spectropolarimetry is required to measure their fields, and ultraviolet spectroscopy to further characterize their low-metallicity, magnetically confined winds, in support of hydrodynamical analyses. © 2015. The American Astronomical Society. All rights reserved..
Database: 
WOK
SCOPUS
ADS
SCOPUS
URL: 
https://ui.adsabs.harvard.edu/#abs/2015AJ....150...99W/abstract
ADS Bibcode: 
2015AJ....150...99W
Keywords: 
Magellanic Clouds; stars: early-type; stars: emission-line, Be; stars: magnetic field; stars: rotation; stars: variables: general