Zobrazeno 1 - 10
of 121
pro vyhledávání: '"Tuvikene T."'
Publikováno v:
Open Astronomy, Vol 21, Iss 4, Pp 531-536 (2012)
We present V - and I-passband photometry of massive stars in the Cyg OB1 and Cyg OB2 associations, based on about 80 observing nights spanning 300 days in the 2011 season. The variability of 22 supergiants and 48 OB-stars with luminosity classes III-
Externí odkaz:
https://doaj.org/article/eb93ed8b92a84aa49296029241978245
Autor:
Liimets, T., Kolka, I., Kraus, M., Eenmäe, T., Tuvikene, T., Augusteijn, T., Amaral, L. Antunes, Djupvik, A. A., Telting, J. H., Deshev, B., Kankare, E., Kankare, J., Lindberg, J. E., Amby, T. M., Pursimo, T., Somero, A., Thygesen, A., Strøm, P. A.
Publikováno v:
A&A 670, A13 (2023)
Context. V838 Monocerotis is a peculiar binary that underwent an immense stellar explosion in 2002, leaving behind an expanding cool supergiant and a hot B3V companion. Five years after the outburst, the B3V companion disappeared from view, and so fa
Externí odkaz:
http://arxiv.org/abs/2211.06629
Autor:
Laur, J., Tempel, E., Tamm, A., Kipper, R., Liivamägi, L. J., Hernán-Caballero, A., Muru, M. M., Chaves-Montero, J., Díaz-García, L. A., Turner, S., Tuvikene, T., Queiroz, C., Bom, C. R., Fernández-Ontiveros, J. A., Delgado, R. M. González, Civera, T., Abramo, R., Alcaniz, J., Benitez, N., Bonoli, S., Carneiro, S., Cenarro, J., Cristóbal-Hornillos, D., Dupke, R., Ederoclite, A., López-Sanjuan, C., Marín-Franch, A., de Oliveira, C. M., Moles, M., Sodré Jr, L., Taylor, K., Varela, J., Ramió, H. V.
Publikováno v:
A&A 668, A8 (2022)
The importance of photometric galaxy redshift estimation is rapidly increasing with the development of specialised powerful observational facilities. We develop a new photometric redshift estimation workflow TOPz to provide reliable and efficient red
Externí odkaz:
http://arxiv.org/abs/2209.01040
Autor:
Tempel, E., Tuvikene, T., Muru, M. M., Stoica, R. S., Bensby, T., Chiappini, C., Christlieb, N., Cioni, M. -R. L., Comparat, J., Feltzing, S., Hook, I., Koch, A., Kordopatis, G., Krumpe, M., Loveday, J., Minchev, I., Norberg, P., Roukema, B. F., Sorce, J. G., Storm, J., Swann, E., Taylor, E. N., Traven, G., Walcher, C. J., de Jong, R. S.
Large multi-object spectroscopic surveys require automated algorithms to optimise their observing strategy. One of the most ambitious upcoming spectroscopic surveys is the 4MOST survey. The 4MOST survey facility is a fibre-fed spectroscopic instrumen
Externí odkaz:
http://arxiv.org/abs/2007.03307
Autor:
Tempel, E., Norberg, P., Tuvikene, T., Bensby, T., Chiappini, C., Christlieb, N., Cioni, M. -R. L., Comparat, J., Davies, L. J. M., Guiglion, G., Koch, A., Kordopatis, G., Krumpe, M., Loveday, J., Merloni, A., Micheva, G., Minchev, I., Roukema, B. F., Sorce, J. G., Starkenburg, E., Storm, J., Swann, E., Thi, W. F., Traven, G., de Jong, R. S.
Publikováno v:
A&A 635, A101 (2020)
Context. Several new multi-object spectrographs are currently planned or under construction that are capable of observing thousands of Galactic and extragalactic objects simultaneously. Aims. In this paper we present a probabilistic fibre-to-target a
Externí odkaz:
http://arxiv.org/abs/2001.09348
Autor:
Tuvikene T., Kolka I.
Publikováno v:
Open Astronomy, Vol 12, Iss 4, Pp 647-648 (2003)
We give overview of the CCD instrumentation and data reduction techniques used at the Tartu Observatory. The first results from photometric observations of the peculiar variable V838 Mon are presented.
Externí odkaz:
https://doaj.org/article/1205f68ad1594ace8148f5ad2553fe28
At the Hamburger Sternwarte an effort was started in 2010 with the aim of digitizing its more than 45000 photographic plates and films stored in its plate archives. At the time of writing, more than 31000 plates have already been made available on th
Externí odkaz:
http://arxiv.org/abs/1607.00312
Friends-of-friends galaxy group finder with membership refinement. Application to the local Universe
Publikováno v:
A&A 588, A14 (2016)
Context. Groups form the most abundant class of galaxy systems. They act as the principal drivers of galaxy evolution and can be used as tracers of the large-scale structure and the underlying cosmology. However, the detection of galaxy groups from g
Externí odkaz:
http://arxiv.org/abs/1601.01117
Autor:
Tempel, E., Tamm, A., Gramann, M., Tuvikene, T., Liivamägi, L. J., Suhhonenko, I., Kipper, R., Einasto, M., Saar, E.
We provide flux-limited and volume-limited galaxy group and cluster catalogues, based on the spectroscopic sample of the SDSS data release 10 galaxies. We used a modified friends-of-friends (FoF) method with a variable linking length in the transvers
Externí odkaz:
http://arxiv.org/abs/1402.1350
Stellar mass distribution in M31 is estimated using optical and infrared imaging data. Combining the derived stellar mass model with various kinematical data, properties of the DM halo of the galaxy are constrained. SDSS observations through the ugri
Externí odkaz:
http://arxiv.org/abs/1208.5712