Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Gazeas, K. D."'
Autor:
Álvarez-Hernández, A., Torres, M. A. P., Rodríguez-Gil, P., Shahbaz, T., Sánchez-Sierras, J., Acosta-Pulido, J. A., Jonker, P. G., Gazeas, K. D., Hakala, P., Corral-Santana, J. M.
We present a dynamical study of the eclipsing intermediate polar XY Ari based on time-resolved near-infrared spectroscopy obtained with the EMIR spectrograph on the 10.4-m Gran Telescopio Canarias. Using main sequence template spectra taken with the
Externí odkaz:
http://arxiv.org/abs/2304.08524
Autor:
Loukaidou, G. A., Gazeas, K. D., Palafouta, S., Athanasopoulos, D., Zola, S., Liakos, A., Niarchos, P. G., Hakala, P., Essam, A., Hatzidimitrio, D.
Ultra-short orbital period contact binaries (Porb < 0.26 d) host some of the smallest and least massive stars. These systems are faint and rare, and it is believed that they have reached a contact configuration after several Gyrs of evolution via ang
Externí odkaz:
http://arxiv.org/abs/2112.06631
Autor:
Álvarez-Hernández, A., Torres, M. A. P., Rodríguez-Gil, P., Shahbaz, T., Anupama, G. C., Gazeas, K. D., Pavana, M., Raj, A., Hakala, P., Stone, G., Gomez, S., Jonker, P. G., Ren, J. -J., Cannizzaro, G., Pastor-Marazuela, I., Goff, W., Corral-Santana, J. M., Sabo, R.
We present a complete dynamical study of the intermediate polar and dwarf nova cataclysmic variable GK Per (Nova Persei 1901) based on a multi-site optical spectroscopy and $R$-band photometry campaign. The radial velocity curve of the evolved donor
Externí odkaz:
http://arxiv.org/abs/2107.06932
Autor:
Gazeas, K. D., Loukaidou, G. A., Niarchos, P. G., Palafouta, S., Athanasopoulos, D., Liakos, A., Zola, S., Essam, A., Hakala, P.
Binary and multiple stellar systems are numerous in our solar neighborhood with 80 per cent of the solar-type stars being members of systems with high order multiplicity. The Contact Binaries Towards Merging (CoBiToM) Project is a programme that focu
Externí odkaz:
http://arxiv.org/abs/2102.04759
Publikováno v:
Acta Astronomica, v.56, pp.127-143, (2006)
New high-quality CCD photometric light curves for the W UMa-type systems V410 Aur, CK Boo, FP Boo, V921 Her, ET Leo, XZ Leo, V839 Oph, V2357 Oph, AQ Psc and VY Sex are presented. The new multicolor light curves, combined with the spectroscopic data r
Externí odkaz:
http://arxiv.org/abs/0903.1364
Autor:
Gazeas, K. D., Niarchos, P. G.
Publikováno v:
Mon.Not.Roy.Astron.Soc.Lett. 370 (2006) L29-L32; Erratum-ibid. 372 (2006) L83
Results are presented on component masses and system angular momenta for over a hundred low-temperature contact binaries. It is found that the secondary components in close binary systems are very similar in mass. Our observational evidence strongly
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606715
Autor:
Zhou, A. -Y., Reed, M. D., Harms, S., Terndrup, D. M., An, D., Zola, S., Gazeas, K. D., Niarchos, P. G., Ogloza, W., Baran, A., Wolf, G. W.
Publikováno v:
Mon.Not.Roy.Astron.Soc.367:179-185,2006
We present the results of extensive time series photometry of the pulsating subdwarf B star KPD 2109+4401. Our data set consists of 29 data runs with a total length of 182.6 hours over 31 days, collected at five observatories in 2004. These data are
Externí odkaz:
http://arxiv.org/abs/astro-ph/0511827
Autor:
Poretti, E., Suarez, J. C., Niarchos, P. G., Gazeas, K. D., Manimanis, V. N., Van Cauteren, P., Lampens, P., Wils, P., Alonso, R., Amado, P. J., Belmonte, J. A., Butterworth, N. D., Martignoni, M., Martin-Ruiz, S., Moskalik, P., Robertson, C. W.
The double--mode pulsation of GSC 00144-03031 has been detected when searching for COROT targets. A very large dataset composed of 4722 photometric measurements was collected at six observatories in Europe and America. There is no hint of the excitat
Externí odkaz:
http://arxiv.org/abs/astro-ph/0506266
Autor:
Álvarez-Hernández, A, Torres, M A P, Rodríguez-Gil, P, Shahbaz, T, Sánchez-Sierras, J, Acosta-Pulido, J A, Jonker, P G, Gazeas, K D, Hakala, P, Corral-Santana, J M
Publikováno v:
Monthly Notices of the Royal Astronomical Society; Sep2023, Vol. 524 Issue 3, p3314-3323, 10p
Autor:
Álvarez-Hernández, A., Torres, M. A. P., Rodríguez-Gil, P., Shahbaz, T., Anupama, G. C., Gazeas, K. D., Pavana, M., Raj, A., Hakala, P., Stone, G., Gomez, S., Jonker, P. G., Ren, J.-J., Cannizzaro, G., Pastor-Marazuela, I., Goff, W., Corral-Santana, J. M., Sabo, R.
Poster contribution to the XV Scientific Meeting of the Sociedad Española de Astronomía (2022). We present a dynamical study of the cataclysmic variable GK Per, comparing our dynamical white dwarf mass with several estimates obtained from indirect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43f0d00275378b148860007cd5b13541