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Akademický článek
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Autor:
Adela Kawka, Daniel Groenewald, Miloslav Zejda, Stefan Keller, Jan Janík, Ernst Paunzen, David A. H. Buckley, Stephane Vennes, Lilia Ferrario, Michael S. Bessell
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 507:L30-L35
We report the discovery of a rare close binary system, SMSS J160639.78-100010.7, comprised of a magnetic white dwarf with a field of about 30 MG and a brown dwarf. We measured an orbital period of 92 min which is consistent with the photometric perio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d869db2a3c9a0926fd653880d5c71e93
https://doi.org/10.1093/mnrasl/slab085
https://doi.org/10.1093/mnrasl/slab085
Autor:
Ernst Paunzen, T. K. Watson, Marek Drozdz, Z. Zemanová, Jan Janík, Gerald Handler, M. S. O’Brien, M. Rode-Paunzen
Publikováno v:
Revista Mexicana de Astronomía y Astrofísica. 56:193-199
Well-defined astrophysical constraints of white dwarfs (WDs), such as on the presence or absence of pulsational variability, are very much needed to refine and develop current models. Because these stars are rather faint and variability periods are m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3dbef2a0a0abfe9c9793d22d8498377
https://doi.org/10.22201/ia.01851101p.2020.56.02.02
https://doi.org/10.22201/ia.01851101p.2020.56.02.02
Publikováno v:
Contributions of the Astronomical Observatory Skalnaté Pleso. 51
The education activities in the form of short and condensed courses such as summer schools are essential parts of the educational process of every scientist. Here we briefly describe the program and the organization of the GATE summer school that was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d31ba896d5f2a5a834196e3b627a84dd
https://doi.org/10.31577/caosp.2021.51.1.41
https://doi.org/10.31577/caosp.2021.51.1.41
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
Publikováno v:
Contributions of the Astronomical Observatory Skalnaté Pleso. 50
HD99458 was recently discovered to be a first object of its kind: a short-period eclipsing binary hosts a spotted, chemically peculiar A-type primary star that is a delta Scuti pulsator, and an M-dwarf secondary. These phenomena should not co-exist a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dba82968b8f385cef7a5a968ff0bfa40
https://doi.org/10.31577/caosp.2020.50.2.630
https://doi.org/10.31577/caosp.2020.50.2.630
Autor:
Petr Kurfürst, Jan Kára, Hana Kučáková, Miloslav Zejda, Petr Zasche, Marek Wolf, J. Merc, Marek Skarka, Jan Janík
We present an extensive study of 162 early-type binary systems located in the LMC galaxy that show apsidal motion and have never been studied before. For the ample systems, we performed light curve and apsidal motion modelling for the first time. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f0d55c9d046f2a199753ee498dcc47d3
Autor:
Maja Vučković, Jiri Krticka, S. Mereghetti, F. Pintore, Jan Janík, Péter Németh, Iva Krtičková, J. Kubat
Hot subdwarfs are helium burning objects in late stages of their evolution. These stars can develop winds driven by light absorption in the lines of heavier elements. The wind strength depends on chemical composition which can significantly vary from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e20a9a4ebd3461e71604ca386eb0c416
http://arxiv.org/abs/1909.12631
http://arxiv.org/abs/1909.12631
Autor:
Iva Krtičková, Andrzej Pigulski, Zdeněk Mikulášek, Gregory W. Henry, Corado Trigilio, Adam Tichý, Oleg Kochukhov, Milan Prvák, Jan Janík, Theresa Lüftinger, Paolo Leto, Jiří Krtička
CU Vir has been the first main sequence star that showed regular radio pulses that persist for decades, resembling the radio lighthouse of pulsars and interpreted as auroral radio emission similar to that found in planets. The star belongs to a rare
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0892e8d35c2f834cba364584a6d0bd00
Autor:
Miloslav Zejda, Selçuk Bilir, Hicran Bakiş, Jan Janík, Jiří Liška, Zdeněk Mikulášek, Volkan Bakiş, Christian Nitschelm, Efecan Tunc
The early-type massive binary MQ Cen (P$_{orb}$=3.7 d) has been investigated by means of high-resolution ($R\sim48\,000$) spectral analysis and multi-band (Johnson $BVRI$ and Str\"{o}mgren $vby$) light curve modeling. The physical parameters of the c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::284db090c8cd4781002d4ccf36621548