Search Results - "Kochukhov, O"

The MiMeS survey of Magnetism in Massive Stars: magnetic analysis of the O-type stars by Grunhut, J H, Wade, G A, Neiner, C, Oksala, M E, Petit, V, Alecian, E, Bohlender, D A, Bouret, J-C, Henrichs, H F, Hussain, G A J, Kochukhov, O

“…We present the analysis performed on spectropolarimetric data of 97 O-type targets included in the framework of the Magnetism in Massive Stars (MiMeS) Survey…”
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FIRST ZEEMAN DOPPLER IMAGING OF A COOL STAR USING ALL FOUR STOKES PARAMETERS by Rosen, L, Kochukhov, O, Wade, G A

“…Magnetic fields are ubiquitous in active cool stars, but they are in general complex and weak. Current Zeeman Doppler imaging (ZDI) studies of cool star…”
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A sudden change of the global magnetic field of the active M dwarf AD Leo revealed by full Stokes spectropolarimetric observations by Lavail, A, Kochukhov, O, Wade, G A

“…In this paper we present an analysis of the first high-resolution full Stokes vector spectropolarimetric observations of the active M dwarf AD Leo. Based on…”
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Magnetic field topology, chemical spot distributions, and photometric variability of the Ap star φ Draconis by Kochukhov, O, Papakonstantinou, N, Neiner, C

“…ABSTRACT The primary component of the multiple star φ Dra is one of the brightest magnetic chemically peculiar stars in the northern sky. Here, we report…”
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The magnetic early B-type stars – III. A main-sequence magnetic, rotational, and magnetospheric biography by Shultz, M E, Wade, G A, Rivinius, Th, Alecian, E, Neiner, C, Petit, V, Owocki, S, ud-Doula, A, Kochukhov, O, Bohlender, D, Keszthelyi, Z

“…ABSTRACT Magnetic confinement of stellar winds leads to the formation of magnetospheres, which can be sculpted into centrifugal magnetospheres (CMs) by…”
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Strong dipole magnetic fields in fast rotating fully convective stars by Shulyak, D., Reiners, A., Engeln, A., Malo, L., Yadav, R., Morin, J., Kochukhov, O.

“…M dwarfs are the most numerous stars in our Galaxy, with masses between approximately 0.5 and 0.1 solar masses. Many of them show surface activity…”
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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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Putting atomic diffusion theory of magnetic ApBp stars to the test: evaluation of the predictions of time-dependent diffusion models by Kochukhov, O, Ryabchikova, T A

“…Abstract A series of recent theoretical atomic diffusion studies has address the challenging problem of predicting inhomogeneous vertical and horizontal…”
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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: introduction and overview by Wade, G. A., Neiner, C., Alecian, E., Grunhut, J. H., Petit, V., Batz, B. de, Bohlender, D. A., Cohen, D. H., Henrichs, H. F., Kochukhov, O., Landstreet, J. D., Manset, N., Martins, F., Mathis, S., Oksala, M. E., Owocki, S. P., Rivinius, Th, Shultz, M. E., Sundqvist, J. O., Townsend, R. H. D., ud-Doula, A., Bouret, J.-C., Braithwaite, J., Briquet, M., Carciofi, A. C., David-Uraz, A., Folsom, C. P., Fullerton, A. W., Leroy, B., Marcolino, W. L. F., Moffat, A. F. J., Nazé, Y., Louis, N. St, Aurière, M., Bagnulo, S., Bailey, J. D., Barbá, R. H., Blazère, A., Böhm, T., Catala, C., Donati, J.-F., Ferrario, L., Harrington, D., Howarth, I. D., Ignace, R., Kaper, L., Lüftinger, T., Prinja, R., Vink, J. S., Weiss, W. W., Yakunin, I.

“…The MiMeS (Magnetism in Massive Stars) project is a large-scale, high-resolution, sensitive spectropolarimetric investigation of the magnetic properties of O-…”
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The pulsationally modulated radial crossover signature of the slowly rotating magnetic B-type star ξ1 CMa by Shultz, M, Kochukhov, O, Wade, G A, Rivinius, Th

“…Abstract We report the latest set of spectropolarimetric observations of the magnetic β Cep star ξ1 CMa. The new observations confirm the long-period model of…”
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New eclipsing binaries with mercury–manganese stars by Kochukhov, O, Labadie-Bartz, J, Khalack, V, Shultz, M E

“…ABSTRACT Eclipsing binary stars are rare and extremely valuable astrophysical laboratories that make possible precise determination of fundamental stellar…”
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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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Surface structure of 45 Hercules: an otherwise unremarkable Ap star with a surprisingly weak magnetic field by Kochukhov, O, Gürsoytrak Mutlay, H, Amarsi, A M, Petit, P, Mutlay, I, Gürol, B

“…ABSTRACT The origin of magnetic fields and their role in chemical spot formation on magnetic Ap stars is currently not understood. Here, we contribute to…”
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The magnetic field topology and chemical abundance distributions of the Ap star HD 32633 by Silvester, J., Kochukhov, O., Wade, G. A.

“…Previous observations of the Ap star HD 32633 indicated that its magnetic field was unusually complex in nature and could not be characterized by a simple…”
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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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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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τ9 Eri: a bright pulsating magnetic Bp star in a 5.95-d double-lined spectroscopic binary by Woodcock, K, Wade, G A, Kochukhov, O, Sikora, J, Pigulski, A

“…ABSTRACT τ9 Eri is a Bp star that was previously reported to be a single-lined spectroscopic binary. Using 17 ESPaDOnS spectropolarimetric (Stokes V)…”
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