Zobrazeno 1 - 10
of 191
pro vyhledávání: '"Cohen, D H"'
Autor:
Das, B., Petit, V., Nazé, Y., Corcoran, M. F., Cohen, D. H., Biswas, A., Chandra, P., David-Uraz, A., Leutenegger, M. A., Neiner, C., Pablo, H., Paunzen, E., Shultz, M. E., ud-Doula, A., Wade, G. A.
We report detailed X-ray observations of the unique binary system $\epsilon$ Lupi, the only known short-period binary consisting of two magnetic early-type stars. The components have comparably strong, but anti-aligned magnetic fields. The orbital an
Externí odkaz:
http://arxiv.org/abs/2304.12882
Autor:
David-Uraz, A., Neiner, C., Sikora, J., Barron, J., Bowman, D. M., Cerrahoğlu, P., Cohen, D. H., Erba, C., Khalack, V., Kobzar, O., Kochukhov, O., Pablo, H., Petit, V., Shultz, M. E., ud-Doula, A., Wade, G. A., Collaboration, the MOBSTER
In this contribution, we present the MOBSTER Collaboration, a large community effort to leverage high-precision photometry from the Transiting Exoplanet Survey Satellite (\textit{TESS}) in order to characterize the variability of magnetic massive and
Externí odkaz:
http://arxiv.org/abs/1912.01102
Autor:
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., Collaboration, the MOBSTER
Publikováno v:
MNRAS, 487, 304 (2019)
In this paper we introduce the MOBSTER collaboration and lay out its scientific goals. We present first results based on the analysis of nineteen previously known magnetic O, B and A stars observed in 2-minute cadence in sectors 1 and 2 of the Transi
Externí odkaz:
http://arxiv.org/abs/1904.11539
Autor:
David-Uraz, A., Erba, C., Petit, V., Fullerton, A. W., Martins, F., Walborn, N. R., MacInnis, R., Barbá, R. H., Cohen, D. H., Apellániz, J. Maíz, Nazé, Y., Owocki, S. P., Sundqvist, J. O., ud-Doula, A., Wade, G. A.
Publikováno v:
MNRAS, 483, 2814 (2019)
In this paper, we present high-resolution HST/COS observations of the extreme magnetic O star NGC 1624-2. These represent the first ultraviolet spectra of this archetypal object. We examine the variability of its wind-sensitive resonance lines, compa
Externí odkaz:
http://arxiv.org/abs/1811.10113
Autor:
Fletcher, C. L., Petit, V., Naze, Y., Wade, G. A., Townsend, R. H., Owocki, S. P., Cohen, D. H., David-Uraz, A., Shultz, M.
Recent spectropolarimetric surveys of bright, hot stars have found that ~10% of OB-type stars contain strong (mostly dipolar) surface magnetic fields (~kG). The prominent paradigm describing the interaction between the stellar winds and the surface m
Externí odkaz:
http://arxiv.org/abs/1702.06500
Autor:
Petit, V., Keszthelyi, Z., MacInnis, R., Cohen, D. H., Townsend, R. H. D., Wade, G. A., Thomas, S. L., Owocki, S. P., Puls, J., ud-Doula, J. A.
The groundbreaking detection of gravitational waves produced by the inspiralling and coalescence of the black hole (BH) binary GW150914 confirms the existence of "heavy" stellar-mass BHs with masses >25 Msun. Initial modelling of the system by Abbott
Externí odkaz:
http://arxiv.org/abs/1611.08964
Autor:
Wade, G. A., Cohen, D. H., Fletcher, C., Handler, G., Huang, L., Krticka, J., Neiner, C., Niemczura, E., Pablo, H., Paunzen, E., Petit, V., Pigulski, A., Rivinius, Th., Rowe, J., Rybicka, M., Townsend, R., Shultz, M., Silvester, J., Sikora, J.
Magnetic B-type stars exhibit photometric variability due to diverse causes, and consequently on a variety of timescales. In this paper we describe interpretation of BRITE photometry and related ground-based observations of 4 magnetic B-type systems:
Externí odkaz:
http://arxiv.org/abs/1611.02793
Autor:
Wade, G. A., Neiner, C., Alecian, E., Grunhut, J. H., Petit, V., de Batz, B., 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., 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.
Publikováno v:
MNRAS, 456, 2-22 (2016)
The MiMeS project is a large-scale, high resolution, sensitive spectropolarimetric investigation of the magnetic properties of O and early B type stars. Initiated in 2008 and completed in 2013, the project was supported by 3 Large Program allocations
Externí odkaz:
http://arxiv.org/abs/1511.08425
Autor:
Petit, V., Cohen, D. H., Wade, G. A., Nazé, Y., Owocki, S. P., Sundqvist, J. O., ud-Doula, A., Fullerton, A., Leutenegger, M., Gagné, M.
Publikováno v:
MNRAS, 453, 3288-3299 (2015)
We observed NGC 1624-2, the O-type star with the largest known magnetic field Bp~20 kG), in X-rays with the ACIS-S camera onboard the Chandra X-ray Observatory. Our two observations were obtained at the minimum and maximum of the periodic Halpha emis
Externí odkaz:
http://arxiv.org/abs/1507.08621
Autor:
Chandra, P., Wade, G. A., Sundqvist, J. O., Oberoi, D., Grunhut, J. H., ud-Doula, A., Petit, V., Cohen, D. H., Oksala, M. E., David-Uraz, A.
We have carried out a study of radio emission from a small sample of magnetic O- and B-type stars using the Giant Metrewave Radio Telescope, with the goal of investigating their magnetospheres at low frequencies. These are the lowest frequency radio
Externí odkaz:
http://arxiv.org/abs/1505.02139