Zobrazeno 1 - 10
of 602
pro vyhledávání: '"Chesneau, O"'
We present GADRAD, a Python module that adopts heuristic search techniques in the form of genetic algorithms, to efficiently model post-asymptotic giant branch (post- AGB) disc environments. GADRAD systematically constructs the multi-dimensional pa-
Externí odkaz:
http://arxiv.org/abs/1705.00120
Autor:
Lamberts, A., Millour, F., Liermann, A., Dessart, L., Driebe, T., Duvert, G., Finsterle, W., Girault, V., Massi, F., Petrov, R. G., Schmutz, W., Weigelt, G., Chesneau, O.
Colliding stellar winds in massive binary systems have been studied through their radio, optical lines and strong X-ray emission for decades. More recently, near-infrared spectrointerferometric observations have become available in a few systems, but
Externí odkaz:
http://arxiv.org/abs/1701.01124
Autor:
Khorrami, Z., Lanz, T., Vakili, F., Lagadec, E., Langlois, M., Brandner, W., Chesneau, O., Meyer, M. R., Carbillet, M., Abe, L., Mouillet, D., Beuzit, JL., Boccaletti, A., Perrot, C., Thalmann, C., Schmid, H. -M., Pavlov, A., Costille, A., Dohlen, K., Mignant, D. Le, Petit, C., Sauvage, J. F.
Publikováno v:
A&A 588, L7 (2016)
We present new near-infrared photometric measurements of the core of the young massive cluster NGC 3603 obtained with extreme adaptive optics. The data were obtained with the SPHERE instrument mounted on ESO Very Large Telescope, and cover three fiel
Externí odkaz:
http://arxiv.org/abs/1603.00457
Autor:
Schaefer, G. H., Brummelaar, T. ten, Gies, D. R., Farrington, C. D., Kloppenborg, B., Chesneau, O., Monnier, J. D., Ridgway, S. T., Scott, N., Tallon-Bosc, I., McAlister, H. A., Boyajian, T., Maestro, V., Mourard, D., Meilland, A., Nardetto, N., Stee, P., Sturmann, J., Vargas, N., Baron, F., Ireland, M., Baines, E. K., Che, X., Jones, J., Richardson, N. D., Roettenbacher, R. M., Sturmann, L., Turner, N. H., Tuthill, P., van Belle, G., von Braun, K., Zavala, R. T., Banerjee, D. P. K., Ashok, N. M., Joshi, V., Becker, J., Muirhead, P. S.
Publikováno v:
Nature, 515, 234-236 (13 November 2014)
A classical nova occurs when material accreting onto the surface of a white dwarf in a close binary system ignites in a thermonuclear runaway. Complex structures observed in the ejecta at late stages could result from interactions with the companion
Externí odkaz:
http://arxiv.org/abs/1505.04852
Autor:
Challouf, M., Nardetto, N., Mourard, D., Graczyk, D., Aroui, H., Chesneau, O., Delaa, O., Pietrzyński, G., Gieren, W., Ligi, R., Meilland, A., Perraut, K., Tallon-Bosc, I., McAlister, H., Brummelaar, T. ten, Sturmann, J., Sturmann, L., Turner, N., Farrington, C., Vargas, N., Scott, N.
Publikováno v:
A&A 570, A104 (2014)
The aim of this work is to improve the SBC relation for early-type stars in the $-1 \leq V-K \leq 0$ color domain, using optical interferometry. Observations of eight B- and A-type stars were secured with the VEGA/CHARA instrument in the visible. The
Externí odkaz:
http://arxiv.org/abs/1409.1351
Autor:
Chesneau, O., Kaufer, A., Stahl, O., Colvinter, C., Spang, A., Dessart, L., Prinja, R., Chini, R.
We present a spatially resolved, high-spectral resolution (R=12000) K-band temporal monitoring of Rigel using AMBER at the VLTI. Rigel was observed in the Bracket Gamma line and its nearby continuum in 2006-2007, and 2009-2010. These unprecedented ob
Externí odkaz:
http://arxiv.org/abs/1405.0907
The yellow hypergiant HR 5171 A: Resolving a massive interacting binary in the common envelope phase
Autor:
Chesneau, O., Meilland, A., Chapellier, E., Millour, F., Van Genderen, A. M., Nazé, Y., Smith, N., Spang, A., Smoker, J. V., Dessart, L., Kanaan, S., Bendjoya, Ph., Feast, M. W., Groh, J. H., Lobel, A., Nardetto, N., Otero, S., Oudmaijer, R. D., Tekola, A. G., Whitelock, P. A., Arcos, C., Curé, M., Vanzi, L.
Publikováno v:
A&A, 563, A71 (23p, 2014)
We initiated long-term optical interferometry monitoring of the diameters of unstable yellow hypergiants (YHG) with the goal of detecting both the long-term evolution of their radius and shorter term formation related to large mass-loss events. We ob
Externí odkaz:
http://arxiv.org/abs/1401.2628
Autor:
Perraut, K., Borgniet, S., Cunha, M., Bigot, L., Brandão, I., Mourard, D., Nardetto, N., Chesneau, O., McAlister, H., Brummelaar, T. A. ten, Sturmann, J., Sturmann, L., Turner, N., Farrington, C., Goldfinger, P. J.
Due to the strong magnetic field and related abnormal surface layers existing in rapidly oscillating Ap stars, systematic errors are likely to be present when determining their effective temperatures, which potentially compromises asteroseismic studi
Externí odkaz:
http://arxiv.org/abs/1309.4423
Aims. We study the close environment of nearby Cepheids using high spatial resolution observations in the mid-infrared with the VLTI/MIDI instrument, a two-beam interferometric recombiner. Methods. We obtained spectra and visibilities for the classic
Externí odkaz:
http://arxiv.org/abs/1309.0854
Autor:
Hillen, M., Verhoelst, T., Van Winckel, H., Chesneau, O., Hummel, C. A., Monnier, J. D., Farrington, C., Tycner, C., Mourard, D., Brummelaar, T. ten, Banerjee, D. P. K., Zavala, R. T.
Binary post-AGB stars are interesting laboratories to study both the evolution of binaries as well as the structure of circumstellar disks. A multiwavelength high angular resolution study of the prototypical object 89 Herculis is performed with the a
Externí odkaz:
http://arxiv.org/abs/1308.6715