Zobrazeno 1 - 10
of 641
pro vyhledávání: '"Gvaramadze, V."'
Autor:
Spetsieri, Z. T., Boumis, P., Chiotellis, A., Akras, S., Derlopa, S., Shetye, S., Meyer, D. M. A., Bowman, D. M., Gvaramadze, V. V.
Studies on the circumstellar structures around evolved stars provide vital information on the evolution of the parent star and the properties of the local interstellar medium. In this work, we present the discovery and characterization of an optical
Externí odkaz:
http://arxiv.org/abs/2206.14806
Autor:
Moutzouri, M., Mackey, J., González, C. Carrasco, Gong, Y., Brose, R., Zargaryan, D., Toalá, J. A., Menten, K. M., Gvaramadze, V. V., Rugel, M. R.
Publikováno v:
A&A 663, A80 (2022)
Winds from massive stars have recently been deemed promising sites for investigating relativistic particle acceleration. Particularly, the resulting bow shock from the interaction of the winds of runaway stars with interstellar matter has been observ
Externí odkaz:
http://arxiv.org/abs/2204.11913
Autor:
Gvaramadze, V. V., Kniazev, A. Y., Gallagher, J. S., Oskinova, L. M., Chu, Y. -H., Gruendl, R. A., Katkov, I. Y.
We report the results of optical spectroscopy of the Small Magellanic Cloud supernova remnant (SNR) MCSNR J0127-7332 and the mass donor Be star, 2dFS 3831, in its associated high-mass X-ray binary SXP 1062 carried out with the Southern African Large
Externí odkaz:
http://arxiv.org/abs/2103.03707
Autor:
Müllner, M., Zwintz, K., Corsaro, E., Steindl, T., Potravnov, I., Guenther, E. W., Kniazev, A., Gvaramadze, V.
Publikováno v:
A&A 647, A168 (2021)
In recent years, our understanding of solar-like oscillations from main sequence to red giant stars has improved dramatically thanks to pristine data collected from space telescopes. One of the remaining open questions focuses around the observationa
Externí odkaz:
http://arxiv.org/abs/2012.07878
We present the results of study of the Galactic candidate luminous blue variable Wray 15-906, revealed via detection of its infrared circumstellar shell (of \approx2 pc in diameter) with the Wide-field Infrared Survey Explorer and the Herschel Space
Externí odkaz:
http://arxiv.org/abs/2008.12797
We report the discovery of a handful of optical hydrogen-poor knots in the central part of an extended infrared nebula centred on the [WO1] star WR 72, obtained by spectroscopic and imaging observations with the Southern African Large Telescope (SALT
Externí odkaz:
http://arxiv.org/abs/1912.11051
We report the discovery of a square axisymmetric circumstellar nebula around the emission-line star HD 93795 in archival Spitzer Space Telescope 24 micron data. We classify HD 93795 as an B9 Ia star using optical spectra obtained with the Southern Af
Externí odkaz:
http://arxiv.org/abs/1912.11054
Autor:
Gvaramadze, V. V., Pakhomov, Yu. V., Kniazev, A. Y., Ryabchikova, T. A., Langer, N., Fossati, L., Grebel, E. K.
We report the discovery of a spiral-like nebula with the Wide-field Infrared Survey Explorer (WISE) and the results of optical spectroscopy of its associated star TYC 8606-2025-1 with the Southern African Large Telescope (SALT). We find that TYC 8606
Externí odkaz:
http://arxiv.org/abs/1909.01364
Autor:
Gvaramadze, V. V., Gräfener, G., Langer, N., Maryeva, O. V., Kniazev, A. Y., Moskvitin, A. S., Spiridonova, O. I.
Publikováno v:
Nature 569, 684-687 (30 May 2019)
Gravitational wave emission can lead to the coalescence of close pairs of compact objects orbiting each other. For the case of neutron stars such mergers may yield masses above the Tolman-Oppenheimer-Volkoff limit, leading to the formation of black h
Externí odkaz:
http://arxiv.org/abs/1904.00012
We report the discovery of a circular shell centred on the Be X-ray binary (BeXB) SXP 1323 in the Small Magellanic Cloud (SMC). The shell was detected in an Halpha image obtained with the Very Large Telescope (VLT). Follow-up spectroscopy with the So
Externí odkaz:
http://arxiv.org/abs/1902.02351