Zobrazeno 1 - 10
of 1 789
pro vyhledávání: '"Gies, D R"'
Autor:
Serantes, S. Reyero, Oskinova, L., Hamann, W. -R., Gómez-González, V. M., Todt, H., Pauli, D., Soria, R., Gies, D. R., Torrejón, J. M., Bulik, T., Ramachandran, V., Sander, A. A. C., Bozzo, E., Poutanen, J.
Ultra-luminous X-ray sources (ULXs) are high-mass X-ray binaries with an X-ray luminosity above $10^{39}$ erg s$^{-1}$. These ULXs can be powered by black holes that are more massive than $20M_\odot$, accreting in a standard regime, or lighter compac
Externí odkaz:
http://arxiv.org/abs/2409.12133
Autor:
Anugu, N., Baron, F., Gies, D. R., Lanthermann, C., Schaefer, G. H., Shepard, K. A., Brummelaar, T. ten, Monnier, J. D., Kraus, S., Bouquin, J. -B. Le, Davies, C. L., Ennis, J., Gardner, T., Labdon, A., Roettenbacher, R. M., Setterholm, B. R., Vollmann, W., Sigismondi, C.
The cool hypergiant star RW Cephei is currently in a deep photometric minimum that began several years ago. This event bears a strong similarity to the Great Dimming of the red supergiant Betelgeuse that occurred in 2019-2020. We present the first re
Externí odkaz:
http://arxiv.org/abs/2307.04926
Autor:
Klement, R., Baade, D., Rivinius, Th., Gies, D. R., Wang, L., Labadie-Bartz, J., Santos, P. Ticiani Dos, Monnier, J. D., Carciofi, A. C., Mérand, A., Anugu, N., Schaefer, G. H., Bouquin, J. -B. Le, Davies, C. L., Ennis, J., Gardner, T., Kraus, S., Setterholm, B. R., Labdon, A.
Because many classical Be stars may owe their nature to mass and angular-momentum transfer in a close binary, the present masses, temperatures, and radii of their components are of high interest for comparison to stellar evolution models. Kappa Dra i
Externí odkaz:
http://arxiv.org/abs/2210.03090
Autor:
Klement, R., Schaefer, G. H., Gies, D. R., Wang, L., Baade, D., Rivinius, Th., Gallenne, A., Carciofi, A. C., Monnier, J. D., Mérand, A., Anugu, N., Kraus, S., Davies, C. L., Lanthermann, C., Gardner, T., Wysocki, P., Ennis, J., Labdon, A., Setterholm, B. R., Bouquin, J. Le
Classical Be stars are possible products of close binary evolution, in which the mass donor becomes a hot, stripped O or B-type subdwarf (sdO/sdB), and the mass gainer spins up and grows a disk to become a Be star. While several Be+sdO binaries have
Externí odkaz:
http://arxiv.org/abs/2112.05073
Autor:
Caballero-Nieves, S. M., Gies, D. R., Baines, E. K., Bouchez, A. H., Dekany, R. G., Goodwin, S. P., Rickman, E. L., Roberts Jr., L. C., Taggart, K., Brummelaar, T. A. ten, Turner, N. H.
We present results of a high angular resolution survey of massive OB stars in the Cygnus OB2 association that we conducted with the NIRI camera and ALTAIR adaptive optics system of the Gemini North telescope. We observed 74 O- and early B-type stars
Externí odkaz:
http://arxiv.org/abs/2008.00064
Stripped-envelope stars (SESs) form in binary systems after losing mass through Roche-lobe overflow. They bear astrophysical significance as sources of UV and ionizing radiation in older stellar populations and, if sufficiently massive, as stripped s
Externí odkaz:
http://arxiv.org/abs/1803.02379
Autor:
White, T. R., Pope, B. J. S., Antoci, V., Pápics, P. I., Aerts, C., Gies, D. R., Gordon, K., Huber, D., Schaefer, G. H., Aigrain, S., Albrecht, S., Barclay, T., Barentsen, G., Beck, P. G., Bedding, T. R., Andersen, M. Fredslund, Grundahl, F., Howell, S. B., Ireland, M. J., Murphy, S. J., Nielsen, M. B., Aguirre, V. Silva, Tuthill, P. G.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 471, p.2882-2901 (2017)
The most powerful tests of stellar models come from the brightest stars in the sky, for which complementary techniques, such as astrometry, asteroseismology, spectroscopy, and interferometry can be combined. The K2 Mission is providing a unique oppor
Externí odkaz:
http://arxiv.org/abs/1708.07462
Autor:
Reyero Serantes, S., Oskinova, L., Hamann, W. -R., Gómez-González, V. M. A., Todt, H., Pauli, D., Soria, R., Gies, D. R., Torrejón, J. M., Bulik, T., Ramachandran, V., Sander, A. A. C., Bozzo, E., Poutanen, J.
Publikováno v:
Astronomy & Astrophysics / Astronomie et Astrophysique; 9/26/2024, Vol. 690, p1-14, 14p
Autor:
Schaefer, G. H., Hummel, C. A., Gies, D. R., Zavala, R. T., Monnier, J. D., Walter, F. M., Turner, N. H., Baron, F., Brummelaar, T. ten, Che, X., Farrington, C. D., Kraus, S., Sturmann, J., Sturmann, L.
We present interferometric observations of the sigma Orionis triple system using the CHARA Array, NPOI, and VLTI. Using these measurements, we spatially resolve the orbit of the close spectroscopic binary (Aa,Ab) for the first time and present a revi
Externí odkaz:
http://arxiv.org/abs/1610.01984
Many short-period binary stars have distant orbiting companions that have played a role in driving the binary components into close separation. Indirect detection of a tertiary star is possible by measuring apparent changes in eclipse times of eclips
Externí odkaz:
http://arxiv.org/abs/1510.01950