2011-2016: Ph.D., Astrophysics, Queen's University, Kingston, Canada
2009-2011: M.Sc., Astrophysics, Université de Montréal, Montréal, Canada
2006-2009: B.Sc., Mathematics and Physics, Université de Montréal, Montréal, Canada
Alexandre David-Uraz
(post-doctoral research associate)
| Email: | alexandre.david-uraz@nasa.gov |
| Org Code: | 662 |
| Address: |
NASA/GSFC Mail Code 662 Greenbelt, MD 20771 |
| Employer: | HOWARD UNIV |
Research Interests
Massive stars
Astrophysics: StarsMy main research interests lie in the field of stellar astrophysics, and more specifically involve the outflows of massive stars, as well as their interaction with magnetic fields in a subset of these stars. Using multi-wavelength observations, I seek to better understand small-scale and large-scale variations that affect these winds, and what they can tell us about the physical processes involved in the atmospheres of massive OB stars.
Positions/Employment
CRESST II postdoctoral associate
Howard University/GSFC - Washington, DC
September 2020 - Present
FQRNT postdoctoral fellow/postdoctoral researcher/NSERC postdoctoral fellow
University of Delaware - Newark, DE
January 2017 - August 2020
FQRNT postdoctoral fellow
Florida Institute of Technology - Melbourne, FL
January 2016 - December 2016
Education
Publications
Refereed
2021. "The effects of surface fossil magnetic fields on massive star evolution – III. The case of τ Sco." Monthly Notices of the Royal Astronomical Society 504 (2): 2474-2492 [10.1093/mnras/stab893] [Journal Article/Letter]
2021. "New observations of NGC 1624−2 reveal a complex magnetospheric structure and underlying surface magnetic geometry★." Monthly Notices of the Royal Astronomical Society 501 (2): 2677-2687 [10.1093/mnras/staa3768] [Journal Article/Letter]
2020. "The magnetic early B-type stars – IV. Breakout or leakage? H α emission as a diagnostic of plasma transport in centrifugal magnetospheres." Monthly Notices of the Royal Astronomical Society 499 (4): 5379-5395 [10.1093/mnras/staa3102] [Journal Article/Letter]
2020. "Chandra spectral measurements of the O supergiant ζ Puppis indicate a surprising increase in the wind mass-loss rate over 18 yr." Monthly Notices of the Royal Astronomical Society 499 (4): 6044-6052 [10.1093/mnras/staa3124] [Journal Article/Letter]
2020. "A search for strong magnetic fields in massive and very massive stars in the Magellanic Clouds." Astronomy & Astrophysics 635 A163 [10.1051/0004-6361/201937098] [Journal Article/Letter]
2020. "No evidence of a sudden change of spectral appearance or magnetic field strength of the O9.7V star HD 54879." Monthly Notices of the Royal Astronomical Society: Letters 492 (1): L1-L5 [10.1093/mnrasl/slz174] [Journal Article/Letter]
2020. "The effects of surface fossil magnetic fields on massive star evolution – II. Implementation of magnetic braking in mesa and implications for the evolution of surface rotation in OB stars." Monthly Notices of the Royal Astronomical Society 493 (1): 518-535 [10.1093/mnras/staa237] [Journal Article/Letter]
2019. "Rotational and pulsational variability in the TESS light curve of HD 27463." Monthly Notices of the Royal Astronomical Society 490 (2): 2102-2111 [10.1093/mnras/stz2782] [Journal Article/Letter]
2019. "MOBSTER – III. HD 62658: a magnetic Bp star in an eclipsing binary with a non-magnetic ‘identical twin’." Monthly Notices of the Royal Astronomical Society 490 (3): 4154-4165 [10.1093/mnras/stz2846] [Journal Article/Letter]
2019. "The MiMeS survey of magnetism in massive stars: magnetic properties of the O-type star population." Monthly Notices of the Royal Astronomical Society 489 (4): 5669-5687 [10.1093/mnras/stz2469] [Journal Article/Letter]
2019. "MOBSTER – II. Identification of rotationally variable A stars observed with TESS in sectors 1–4." Monthly Notices of the Royal Astronomical Society 487 (4): 4695-4710 [10.1093/mnras/stz1581] [Journal Article/Letter]
2019. "Magnetic OB[A] Stars with TESS: probing their Evolutionary and Rotational properties (MOBSTER) – I. First-light observations of known magnetic B and A stars." Monthly Notices of the Royal Astronomical Society 487 (1): 304-317 [10.1093/mnras/stz1181] [Journal Article/Letter]
2019. "The effects of surface fossil magnetic fields on massive star evolution: I. Magnetic field evolution, mass-loss quenching, and magnetic braking." Monthly Notices of the Royal Astronomical Society 485 (4): 5843-5860 [10.1093/mnras/stz772] [Journal Article/Letter]
2019. "Rotational modulation in TESS B stars." Monthly Notices of the Royal Astronomical Society 485 (3): 3457-3469 [10.1093/mnras/stz586] [Journal Article/Letter]
2019. "Diverse Variability of O and B Stars Revealed from 2-minute Cadence Light Curves in Sectors 1 and 2 of the TESS Mission: Selection of an Asteroseismic Sample." The Astrophysical Journal 872 (1): L9 [10.3847/2041-8213/ab01e1] [Journal Article/Letter]
2019. "Extreme resonance line profile variations in the ultraviolet spectra of NGC 1624-2: probing the giant magnetosphere of the most strongly magnetized known O-type star." Monthly Notices of the Royal Astronomical Society 483 (2): 2814-2824 [10.1093/mnras/sty3227] [Journal Article/Letter]
2019. "BRITE photometry of the massive post-RLOF system HD149 404." Astronomy & Astrophysics 621 A15 [10.1051/0004-6361/201833594] [Journal Article/Letter]
2017. "Investigating the origin of cyclical wind variability in hot massive stars – II. Hydrodynamical simulations of corotating interaction regions using realistic spot parameters for the O giant ξ Persei." Monthly Notices of the Royal Astronomical Society 470 (3): 3672-3684 [10.1093/mnras/stx1478] [Journal Article/Letter]
2017. "Studying the photometric and spectroscopic variability of the magnetic hot supergiant ζ Orionis Aa." Astronomy & Astrophysics 602 A91 [10.1051/0004-6361/201630318] [Journal Article/Letter]
2017. "A JVLA survey of the high-frequency radio emission of the massive magnetic B- and O-type stars." Monthly Notices of the Royal Astronomical Society 465 (2): 2160-2169 [10.1093/mnras/stw2838] [Journal Article/Letter]
2016. "The MiMeS survey of magnetism in massive stars: introduction and overview." Monthly Notices of the Royal Astronomical Society 456 (1): 2-22 [10.1093/mnras/stv2568] [Journal Article/Letter]
2015. "Detection of 610-MHz radio emission from hot magnetic stars." Monthly Notices of the Royal Astronomical Society 452 (2): 1245-1253 [10.1093/mnras/stv1378] [Journal Article/Letter]
2014. "Investigating the origin of cyclical wind variability in hot, massive stars – I. On the dipolar magnetic field hypothesis★." Monthly Notices of the Royal Astronomical Society 444 (1): 429-442 [10.1093/mnras/stu1458] [Journal Article/Letter]
2012. "Using MOST to reveal the secrets of the mischievous Wolf-Rayet binary CV Ser." Monthly Notices of the Royal Astronomical Society 426 (3): 1720-1730 [10.1111/j.1365-2966.2012.21736.x] [Journal Article/Letter]