Pracovní skupina otevřených hvězdokup

@article{2024BlgAJ..41...55R,

title = {Estimation of radial velocities of BHB stars },

author = {T. Ramezani and E. Paunzen and C. Xia and K. Pivonková and P. Mondal },

doi = {10.48550/arXiv.2405.13822 },

year  = {2024},

date = {2024-07-02},

journal = {Bulgarian Astronomical Journal},

volume = {41},

pages = {55},

abstract = {We studied blue horizontal branch stars (BHBs), and calculated their radial velocities. Spectra of these stars have been obtained with moderate signal-to-noise ratio for five blue horizontal-branch stars using the 2 meter telescope and Echelle Spectrograph in Ondřejov observatory, Czech republic.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2024arXiv240721373P,

title = {An all-sky catalogue of stellar reddening values},

author = {E. Paunzen and M. Netopil and M. Prisegen and N. Faltova},

doi = {10.48550/arXiv.2407.21373},

year  = {2024},

date = {2024-07-01},

journal = {arXiv e-prints},

pages = {arXiv:2407.21373},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2024BlgAJ..41....3R,

title = {A New Approach to Find the Böhm-Vitense gap},

author = {T. Ramezani and E. Paunzen and M. Piecka and M. Kajan},

doi = {10.48550/arXiv.2401.09264},

year  = {2024},

date = {2024-07-01},

urldate = {2024-07-01},

journal = {Bulgarian Astronomical Journal},

volume = {41},

pages = {3},

abstract = {This paper discusses the Böhm-Vitense gap, a gap in the colours of stars that occurs when the atmosphere changes from radiative to convective in deep layers. We are using different algorithms for detecting gaps in colour-magnitude diagrams (CMDs), including the k-nearest neighbours (k-NN) and UniDip algorithms. We propose using a combination of the k-NN algorithm and the UniDip algorithm and manual verification to identify gaps unlikely to be of a statistical origin. Using the Gaia photometric system, i.e. BP − RP , we took the data of 130 star clusters and searched for gaps in the ranges of 0.40 to 0.47 mag, and 0.56 to 0.60 mag, respectively. We analysed all data statistically and identified the gaps in the individual clusters. Finally, we applied the kernel density estimator to see how the gaps are distributed.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2024A&A...687A.176K,

title = {Chemically peculiar stars on the pre-main sequence},

author = {L. Kueß and E. Paunzen and N. Faltová and D. Jadlovský and M. Labaj and M. Mesarč and P. Mondal and M. Prišegen and T. Ramezani and J. Supíková and K. Svačinková and M. Vítková and C. Xia and K. Bernhard and S. Hümmerich},

doi = {10.1051/0004-6361/202348926},

year  = {2024},

date = {2024-07-01},

urldate = {2024-07-01},

journal = {Astronomy & Astrophysics},

volume = {687},

pages = {A176},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2024A&A...683L...7P,

title = {The astrophysical parameters of chemically peculiar stars from automatic methods},

author = {E. Paunzen},

doi = {10.1051/0004-6361/202348086},

year  = {2024},

date = {2024-03-01},

urldate = {2024-03-01},

journal = {Astronomy & Astrophysics},

volume = {683},

pages = {L7},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2023A&A...678A..20P,

title = {Uncovering new white dwarf-open cluster associations using Gaia DR3},

author = {M. Prišegen and N. Faltová},

doi = {10.1051/0004-6361/202245706},

year  = {2023},

date = {2023-10-01},

urldate = {2023-10-01},

journal = {Astronomy & Astrophysics},

volume = {678},

pages = {A20},

keywords = {},

pubstate = {published},

tppubtype = {article}

}