SIMBAD references

2016MNRAS.460.1811S - Mon. Not. R. Astron. Soc., 460, 1811-1828 (2016/August-1)

HD 35502: a hierarchical triple system with a magnetic B5IVpe primary.

SIKORA J., WADE G.A., BOHLENDER D.A., SHULTZ M., ADELMAN S.J., ALECIAN E., HANES D., MONIN D., NEINER C. (The MiMeS and BinaMIcS Collaborations)

Abstract (from CDS):

We present our analysis of HD 35502 based on high- and medium-resolution spectropolarimetric observations. Our results indicate that the magnetic B5IVsnp star is the primary component of a spectroscopic triple system and that it has an effective temperature of 18.4±0.6 kK, a mass of 5.7±0.6 M_☉, and a polar radius of 3.0^{+1.1}_{-0.5} R_☉. The two secondary components are found to be essentially identical A-type stars for which we derive effective temperatures (8.9±0.3 kK), masses (2.1±0.2 M_☉), and radii (2.1±0.4 R_☉). We infer a hierarchical orbital configuration for the system in which the secondary components form a tight binary with an orbital period of 5.668 66(6) d that orbits the primary component with a period of over 40 yr. Least-Squares Deconvolution profiles reveal Zeeman signatures in Stokes V indicative of a longitudinal magnetic field produced by the B star ranging from approximately -4 to 0 kG with a median uncertainty of 0.4 kG. These measurements, along with the line variability produced by strong emission in Hα, are used to derive a rotational period of 0.853 807(3) d. We find that the measured v sin i=75±5 km s^-1 of the B star then implies an inclination angle of the star's rotation axis to the line of sight of 24+6–10 . Assuming the Oblique Rotator Model, we derive the magnetic field strength of the B star's dipolar component (14^{+9}_{-3} kG) and its obliquity (63±13°). Furthermore, we demonstrate that the calculated Alfven radius (41^{+17}{–6}R*) and Kepler radius (2.1^{+0.4}{–0.7}R*) place HD 35502's central B star well within the regime of centrifugal magnetosphere-hosting stars.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: early-type - stars: individual: HD 35502 - stars: magnetic field - stars: magnetic field

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

CDS comments: In references, the right bibcode for Landstreet et al. 2007 is 2007A&A...470..685L.

Simbad objects: 10

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2021.06.16-18:55:26

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