Search Results - "Uraz, A"

The effects of surface fossil magnetic fields on massive star evolution: I. Magnetic field evolution, mass-loss quenching, and magnetic braking by Keszthelyi, Z, Meynet, G, Georgy, C, Wade, G A, Petit, V, David-Uraz, A

“…Abstract Surface magnetic fields have a strong impact on stellar mass loss and rotation and, as a consequence, on the evolution of massive stars. In this work,…”
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The Effects of Surface Fossil Magnetic Fields on Massive Star Evolution – III. the Case of τ Sco by Keszthelyi, Z., Meynet, G., Martins, F., Koter, A. de, David-Uraz, A.

“…τ Sco, a well-studied magnetic B-type star in the Upper Sco association, has a number of surprising characteristics. It rotates very slowly and shows nitrogen…”
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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 by Keszthelyi, Z, Meynet, G, Shultz, M E, David-Uraz, A, ud-Doula, A, Townsend, R H D, Wade, G A, Georgy, C, Petit, V, Owocki, S P

“…ABSTRACT The time evolution of angular momentum and surface rotation of massive stars are strongly influenced by fossil magnetic fields via magnetic braking…”
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MOBSTER – II. Identification of rotationally variable A stars observed with TESS in sectors 1–4 by Sikora, J, David-Uraz, A, Chowdhury, S, Bowman, D M, Wade, G A, Khalack, V, Kobzar, O, Kochukhov, O, Neiner, C, Paunzen, E

“…Recently, high-precision optical 2-min cadence light curves obtained with TESS for targets located in the mission's defined first four sectors have been…”
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Rotational modulation in TESS B stars by Balona, L A, Handler, G, Chowdhury, S, Ozuyar, D, Engelbrecht, C A, Mirouh, G M, Wade, G A, David-Uraz, A, Cantiello, M

“…Abstract Light curves and periodograms of 160 B stars observed by the Transiting Exoplanet Survey Satellite (TESS) space mission and 29 main-sequence B stars…”
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TESS survey of rotational and pulsational variability of mercury–manganese stars by Kochukhov, O, Khalack, V, Kobzar, O, Neiner, C, Paunzen, E, Labadie-Bartz, J, David-Uraz, A

“…ABSTRACT Mercury–manganese (HgMn) stars are late-B upper main sequence chemically peculiar stars distinguished by large overabundances of heavy elements, slow…”
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The magnetic early B-type stars – IV. Breakout or leakage? H α emission as a diagnostic of plasma transport in centrifugal magnetospheres by Shultz, M E, Owocki, S, Rivinius, Th, Wade, G A, Neiner, C, Alecian, E, Kochukhov, O, Bohlender, D, ud-Doula, A, Landstreet, J D, Sikora, J, David-Uraz, A, Petit, V, Cerrahoğlu, P, Fine, R, Henson, G

“…ABSTRACT Rapidly rotating early-type stars with strong magnetic fields frequently show H α emission originating in centrifugal magnetospheres (CMs),…”
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MOBSTER – VI. The crucial influence of rotation on the radio magnetospheres of hot stars by Shultz, M E, Owocki, S P, ud-Doula, A, Biswas, A, Bohlender, D, Chandra, P, Das, B, David-Uraz, A, Khalack, V, Kochukhov, O, Landstreet, J D, Leto, P, Monin, D, Neiner, C, Rivinius, Th, Wade, G A

“…ABSTRACT Numerous magnetic hot stars exhibit gyrosynchrotron radio emission. The source electrons were previously thought to be accelerated to relativistic…”
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The MiMeS survey of magnetism in massive stars: magnetic properties of the O-type star population by Petit, V, Wade, G A, Schneider, F R N, Fossati, L, Kamp, K, Neiner, C, David-Uraz, A, Alecian, E

“…ABSTRACT In this paper, we describe an analysis of the MiMeS (Magnetism in Massive Stars) survey of O-type stars to explore the range of dipolar field…”
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New observations of NGC 1624−2 reveal a complex magnetospheric structure and underlying surface magnetic geometry by David-Uraz, A, Petit, V, Shultz, M E, Fullerton, A W, Erba, C, Keszthelyi, Z, Seadrow, S, Wade, G A

“…ABSTRACT NGC 1624−2 is the most strongly magnetized O-type star known. Previous spectroscopic observations of this object in the ultraviolet provided evidence…”
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Magnetic OB[A] Stars with TESS: probing their Evolutionary and Rotational properties (MOBSTER) – I. First-light observations of known magnetic B and A stars by David-Uraz, A, Neiner, C, Sikora, J, Bowman, D M, Petit, V, Chowdhury, S, Handler, G, Pergeorelis, M, Cantiello, M, Cohen, D H, Erba, C, Keszthelyi, Z, Khalack, V, Kobzar, O, Kochukhov, O, Labadie-Bartz, J, Lovekin, C C, MacInnis, R, Owocki, S P, Pablo, H, Shultz, M E, ud-Doula, A, Wade, G A

“…Abstract In this paper we introduce the MOBSTER collaboration and lay out its scientific goals. We present first results based on the analysis of 19 previously…”
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MOBSTER – V. Discovery of a magnetic companion star to the magnetic β Cep pulsator HD 156424 by Shultz, M E, Rivinius, Th, Wade, G A, Kochukhov, O, Alecian, E, David-Uraz, A, Sikora, J

“…ABSTRACT HD 156424 (B2 V) is a little-studied magnetic hot star in the Sco OB4 association, previously noted to display both high-frequency radial velocity…”
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The Effects of Surface Fossil Magnetic Fields on Massive Star Evolution: IV. Grids of Models at Solar, LMC, and SMC Metallicities by Keszthelyi, Z., Koter, A de, Götberg, Y, Meynet, G, Brands, S A, Petit, V, Carrington, M, David-Uraz, A, Geen, S T, Georgy, C, Hirschi, R, Puls, J, Ramalatswa, K J, Shultz, M E, ud-Doula, A

“…Magnetic fields can drastically change predictions of evolutionary models of massive stars via mass-loss quenching, magnetic braking, and efficient angular…”
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Ultraviolet line profiles of slowly rotating massive star winds using the ‘analytic dynamical magnetosphere’ formalism by Erba, C, David-Uraz, A, Petit, V, Hennicker, L, Fletcher, C, Fullerton, A W, Naze, Y, Sundqvist, J, ud-Doula, A

“…Recent large-scale spectropolarimetric surveys have established that a small but significant percentage of massive stars host stable, surface dipolar magnetic…”
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Detection of an extremely strong magnetic field in the double-degenerate binary merger product HD 144941 by Shultz, M E, Kochukhov, O, Labadie-Bartz, J, David-Uraz, A, Owocki, S P

“…HD 144941 is an extreme He (EHe) star, a rare class of subdwarf OB star formed from the merger of two white dwarf (WD) stars. Uniquely amongst EHe stars, its…”
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MOBSTER – III. HD 62658: a magnetic Bp star in an eclipsing binary with a non-magnetic ‘identical twin’ by Shultz, M E, Johnston, C, Labadie-Bartz, J, Petit, V, David-Uraz, A, Kochukhov, O, Wade, G A, Pepper, J, Stassun, K G, Rodriguez, J E, Lund, M B, James, D J

“…ABSTRACT HD 62658 (B9p V) is a little-studied chemically peculiar star. Light curves obtained by the Kilodegree Extremely Little Telescope (KELT) and…”
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The Effects of Surface Fossil Magnetic Fields on Massive Star Evolution - III. The Case of τSco by Keszthelyi, Z, Meynet, G, Martins, F, Koter, A de, David-Uraz, A

“…τSco, a well-studied magnetic B-type star in the Upper Sco association, has a number of surprising characteristics. It rotates very slowly and shows nitrogen…”
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Analysis of Eight Magnetic Chemically Peculiar Stars With Rotational Modulation by Kobzar, O, Khalack, V, Bohlender, D, Mathys, G, Shultz, M E, Bowman, D M, Paunzen, E, Lovekin, C, David-Uraz, A, Sikora, J, Lampens, P, Richard, O

“…Since the end of 2018, the Transiting Exoplanet Survey Satellite (TESS) has provided stellar photometry to the astronomical community. We have used TESS data…”
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MOBSTER - IV. Detection of a new magnetic B-type star from follow-up spectropolarimetric observations of photometrically selected candidates by David-Uraz, A, Shultz, M E, Petit, V, Bowman, D M, Erba, C, Fine, R A, Neiner, C, Pablo, Herbert, Sikora, J, ud-Doula, A, Wade, G A

“…In this paper, we present results from the spectropolarimetric follow-up of photometrically selected candidate magnetic B stars from the MOBSTER project. Out…”
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Rotational and pulsational variability in the TESS light curve of HD 27463 by Khalack, V, Lovekin, C, Bowman, D M, Kobzar, O, David-Uraz, A, Paunzen, E, Sikora, J, Lenz, P, Kochukhov, O, Holdsworth, D L, Wade, G A

“…ABSTRACT The new photometric data on pulsating Ap star HD 27463 obtained recently with the Transiting Exoplanet Survey Satellite (TESS) are analysed to search…”
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