Zobrazeno 1 - 10
of 591
pro vyhledávání: '"Marchenko, S."'
Autor:
Criscuoli, S., Bertello, L., Choudhary, D. P., DeLand, M., Kopp, G., Kowalski, A., Marchenko, S., Reardon, K., Pevtsov, A. A., Tilipman, D.
Long-term high-cadence measurements of stellar spectral variability are fundamental to better understand stellar atmospheric properties and stellar magnetism. These, in turn, are fundamental for the detectability of exoplanets as well as the characte
Externí odkaz:
http://arxiv.org/abs/2305.07676
Autor:
Marchenko, S. V.
We discuss the results of time-resolved spectroscopy of three presumably single Population I Wolf-Rayet stars in the Small Magellanic Cloud, where the ambient metallicity is $sim 1/5 Z_odot$. We were able to detect and follow numerous small-scale win
Externí odkaz:
http://opus.kobv.de/ubp/volltexte/2008/1776/
Publikováno v:
MATEC Web of Conferences, Vol 395, p 01020 (2024)
To master the course on translation of special texts, the student must first successfully complete the study of such disciplines as Abstracting and annotating the text of the first foreign language, a practical course in translation of the first fore
Externí odkaz:
https://doaj.org/article/ffaebe6fdc3245e1812fc34791236792
Autor:
Marchenko, S. V., Moffat, A. F. J.
A combined mid-IR spectrum of five colliding-wind, massive, dust-producing Population I Wolf-Rayet (WR) binaries shows a wealth of absorption and emission details coming from the circumstellar dust envelopes, as well as from the interstellar medium.
Externí odkaz:
http://arxiv.org/abs/1703.01236
Publikováno v:
Journal of Space Weather and Space Climate, 2016
Utilizing the excellent stability of the Ozone Monitoring Instrument (OMI), we characterize both short-term (solar rotation) and long-term (solar cycle) changes of the solar spectral irradiance (SSI) between 265-500 nm during the on-going Cycle 24. W
Externí odkaz:
http://arxiv.org/abs/1610.08001
Akademický článek
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Autor:
Chené, A. -N., Foellmi, C., Marchenko, S. V., St-Louis, N., Moffat, A. F. J., Ballereau, D., Chauville, J., Zorec, J., Poteet, C. A.
Aims. What is the origin of the large-amplitude variability in Wolf-Rayet WN8 stars in general and WR123 in particular? A dedicated spectroscopic campaign targets the ten-hour period previously found in the high-precision photometric data obtained by
Externí odkaz:
http://arxiv.org/abs/1104.5182
Autor:
Hénault-Brunet, V., St-Louis, N., Marchenko, S. V., Pollock, A. M. T., Carpano, S., Talavera, A.
Publikováno v:
(2011) ApJ 735 , 13
The Wolf-Rayet star WR 46 is known to exhibit a very complex variability pattern on relatively short time scales of a few hours. Periodic but intermittent radial velocity shifts of optical lines as well as multiple photometric periods have been found
Externí odkaz:
http://arxiv.org/abs/1104.4497
In 1997 and 2008 we used the WFPC2 camera on board of the Hubble Space Telescope to obtain two sets of narrow-band H$\alpha$ images of the runaway Wolf-Rayet (WR) star WR 124 surrounded by its nebula M1-67. This two-epoch imaging provides an expansio
Externí odkaz:
http://arxiv.org/abs/1011.0785
Autor:
Williams, P. M., Marchenko, S. V., Marston, A. P., Moffat, A. F. J., Varricatt, W. P., Dougherty, S. M., Kidger, M. R., Morbidelli, L., Tapia, M.
Publikováno v:
Mon.Not.Roy.Astron.Soc.395:1749,2009
We present high-resolution infrared (2--18 micron) images of the archetypal periodic dust-making Wolf-Rayet binary system WR140 (HD 193793) taken between 2001 and 2005, and multi-colour (J -- [19.5]) photometry observed between 1989 and 2001. The ima
Externí odkaz:
http://arxiv.org/abs/0902.4540