A. David-Uraz
Goddard Space Flight Center
7 Papers
28 Citations
A. David-Uraz is an academic researcher from Goddard Space Flight Center. The author has contributed to research in topics: Stars & Magnetosphere. The author has an hindex of 3, co-authored 7 publications. Previous affiliations of A. David-Uraz include University of Delaware & Howard University.
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Papers
TESS survey of rotational and pulsational variability of mercury-manganese stars
Oleg Kochukhov,Viktor Khalack,Oleh Kobzar,Coralie Neiner,Ernst Paunzen,J. Labadie-Bartz,A. David-Uraz,A. David-Uraz +7 more
TL;DR: In this paper, the authors used 2-min cadence light curves of 64 HgMn stars observed by the TESS satellite during the first two years of its operation to investigate the incidence of rotational modulation and pulsations among the stars.
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The effects of surface fossil magnetic fields on massive star evolution: III. The case of τ Sco
Z. Keszthelyi,Georges Meynet,Fabrice Martins,A. de Koter,A. de Koter,A. David-Uraz,A. David-Uraz,A. David-Uraz +7 more
TL;DR: In this article, the authors employed the CMFGEN radiative transfer code to determine the fundamental parameters and surface CNO and helium abundances of a magnetic B-type star in the Upper Sco association, and employed MESA and GENEC stellar evolution models accounting for the effects of surface magnetic fields.
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Detection of an extremely strong magnetic field in the double-degenerate binary merger product HD 144941
TL;DR: In this article, the first high-resolution spectropolarimetric observations of HD 144941 were reported, in which they detect an extremely strong magnetic field both in circular polarization (with a line-of-sight magnetic field averaged over the stellar disk) and in Zeeman splitting of spectral lines (yielding a magnetic modulus of 17$ kG).
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Ultraviolet line profiles of slowly rotating massive star winds using the 'analytic dynamical magnetosphere' formalism
C. Erba,A. David-Uraz,A. David-Uraz,A. David-Uraz,Véronique Petit,L. Hennicker,Corinne Fletcher,Alexander W. Fullerton,Yaël Nazé,J. O. Sundqvist,Asif ud-Doula +10 more
TL;DR: In this article, the formation of UV resonance lines in slowly rotating magnetic massive stars with dynamical magnetospheres was investigated using the Analytic Dynamical Magnetosphere (ADM) formalism.
New observations of NGC 1624−2 reveal a complex magnetospheric structure and underlying surface magnetic geometry
A. David-Uraz,A. David-Uraz,A. David-Uraz,Véronique Petit,Matt Shultz,Alexander W. Fullerton,C. Erba,Z. Keszthelyi,S. Seadrow,Gregg A. Wade +9 more
TL;DR: The most strongly magnetized O-type star known is NGC 1624-2 as mentioned in this paper, which has a topologically complex magnetosphere, and its magnetosphere has been shown to have a complex structure.
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