Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Olga Pintado"'
Autor:
Krzysztof Kamiński, Ernst Paunzen, Jan Janík, Olga Pintado, Swetlana Hubrig, Monika K. Kamińska, S. Hümmerich, Silva P. Järvinen, P. Zielinski, Klaus Bernhard, Luciano Fraga, J. Tokarek, Przemysław Walczak, Marek Skarka, Jiří Krtička, M. Prišegen, Ilya Ilyin, Miloslav Zejda, Miroslav Jagelka, Zdeněk Mikulášek, T. Pribulla, E. Niemczura
Publikováno v:
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Chemically peculiar (CP) stars of the upper main sequence are characterised by specific anomalies in the photospheric abundances of some chemical elements. The group of CP2 stars, which encompasses classical Ap and Bp stars, exhibits strictly periodi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a216059065d00d53c0ba67c4561b8427
http://arxiv.org/abs/2008.02833
http://arxiv.org/abs/2008.02833
Autor:
Swetlana Hubrig, Maciej Konacki, Franz-Josef Hambsch, Miroslav Fedurco, Klaus Bernhard, Stefan Hümmerich, Krzysztof G. Hełminiak, Olga Pintado, Ewa Niemczura, Luciano Fraga, Ernst Paunzen
Publikováno v:
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
The spectroscopic binary system HD 66051 (V414 Pup) consists of a highly peculiar CP3 (HgMn) star and an A-type component. It also shows out-of-eclipse variability that is due to chemical spots. This combination allows the derivation of tight constra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::086e11daef774aa6b5971d722c5ce711
Autor:
Ernst Paunzen, Martin Netopil, Lýdia Stofanová, Petr Kurfürst, Olga Pintado, Y. Aidelman, Stefano Cariddi, Naira M. Azatyan
The study of chemically peculiar (CP) stars in open clusters provides valuable information about their evolutionary status. Their detection can be performed using the $\Delta a$ photometric system, which maps a characteristic flux depression at $\lam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8191c16ba4823811a80151f4b881c27d
http://hdl.handle.net/11577/3260126
http://hdl.handle.net/11577/3260126
Autor:
Ryuko Hirata, C. Neiner, T. Morel, Maryline Briquet, Rafael Costero, O. Thizy, P. De Cat, Byeong-Cheol Lee, Huib F. Henrichs, Vincent Geers, David Mkrtichian, Juan Echevarria, A. M. Hubert, Gerald Handler, Ch. Martayan, J. Vanautgaerden, Duncan J. Wright, Holger Lehmann, Yves Fremat, A. Tijani, I. Han, S. Masuda, Stéphane Mathis, A. Bruch, Conny Aerts, Karolien Lefever, Olga Pintado, B. de Batz, K. Uytterhoeven, Daniel R. Reese, Shoufeng Yang, Eiji Kambe
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 427:483-493
We used extensive ground-based multisite and archival spectroscopy to derive observational constraints for a seismic modelling of the magnetic beta Cep star V2052 Ophiuchi. The line-profile variability is dominated by a radial mode (f_1=7.14846 d^{-1
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 419:3604-3607
The small group of ? Bootis stars comprises late B- to early F-type stars, with moderate to extreme (up to a factor of 100) surface underabundances of most Fe-peak elements and solar abundances of lighter elements (C, N, O and S). The main mechanisms
Autor:
Margarida S. Cunha, R. Monier, Friedrich Kupka, Francis Leblanc, Jozef Ziznovsky, Ernst Paunzen, Olga Pintado, Gautier Mathys, Oleg Kochukhov, Nikolai Piskunov, Michael M. Dworetsky
Publikováno v:
Proceedings of the International Astronomical Union. 7:203-206
Autor:
S. Hubrig, Angelina Shavrina, Gregg A. Wade, Maryline Briquet, Michael Gruberbauer, Glenn M. Wahlgren, Lyudmila Mashonkina, Tatiana Ryabchikova, L. Cidale, J. Ziznovsky, N. Polosukhina, Kutluay Yüce, Olga Pintado, N. Nunez, Oleg Kochukhov, T. Nomura, J. Silvester, R. O. Gray, Natalia A. Drake, J. C. Sousa, Michael M. Dworetsky, Charles R. Cowley, Jiří Krtička
Publikováno v:
HIGHLIGHTS OF ASTRONOMY VOL 15
The atmospheres of chemically peculiar stars can be highly structured in both the horizontal and vertical dimensions. While most prevalent in the magnetic stars, these structures can also exist in non-magnetic stars. In addition to providing an impor
Publikováno v:
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Aims: To determine the metallicities of 113 Southern Hemisphere Vega-like candidate stars in relation to the Exoplanet host group and field stars. Methods: We applied two spectroscopic methods of abundance determinations: equivalent width measurement
Autor:
Santiago Paolantonio, Olga Pintado
Publikováno v:
Revista Latino-Americana de Educação em Astronomia. :7-18
Propomos neste trabalho um projeto educativo dirigido ao Ensino Médio que consiste na determinação da distância Terra-Lua pelo efeito da paralaxe. As técnicas de observação, medidas e cálculos auxiliares são descritos, e os resultados obtido
Autor:
Saul J. Adelman, Olga Pintado
Publikováno v:
Astronomy & Astrophysics. 406:987-994
We used data from the EBASIM spectrograph of the 2.1-m CASLEO telescope to study three rather sharp-lined late B to early A stars ξ Oct (B6 IV), α Sex (B9.5 III), and 68 Tau (A2 IV). These measurements are compared with those from the Anglo-Austria