Zobrazeno 1 - 10
of 159
pro vyhledávání: '"Piskunov, A. E."'
Autor:
Ishchenko, Maryna, Kovaleva, Dana A., Berczik, Peter, Kharchenko, Nina V., Piskunov, Anatoly E., Polyachenko, Evgeny, Postnikova, Ekaterina, Just, Andreas, Borodina, Olga, Omarov, Chingis, Sobodar, Olexandr
In a previous paper using Gaia DR2 data, we demonstrated that the two closely situated open clusters Collinder 135 and UBC 7 might have formed together about 50 Myr ago. In this work, we performed star-by-star dynamical modelling of the evolution of
Externí odkaz:
http://arxiv.org/abs/2404.12255
Autor:
Just, Andreas, Piskunov, Anatoly E., Klos, Jonathan H., Kovaleva, Dana A., Polyachenko, Evgeny V.
Publikováno v:
A&A 672, A187 (2023)
We built Galactic open star cluster mass functions (CMFs) for different age sub-samples in the wider solar neighbourhood. We present a simple cluster formation and evolution model to reproduce the main features of the CMFs. We used an unbiased sample
Externí odkaz:
http://arxiv.org/abs/2302.10735
We aim at establishing safe membership and evolutionary status of 11 chemically peculiar (CP) stars that are residing in the domain of the open cluster NGC2516 and are frequently referred to as cluster members. We queried the Gaia EDR3 catalogue in a
Externí odkaz:
http://arxiv.org/abs/2206.12824
Autor:
Kovaleva, Dana, Ishchenko, Marina, Postnikova, Ekaterina, Berczik, Peter, Piskunov, Anatoly E., Kharchenko, Nina V., Polyachenko, Evgeny, Reffert, Sabine, Sysoliatina, Kseniia, Just, Andreas
Publikováno v:
A&A 642, L4 (2020)
Given the closeness of the two open clusters Cr 135 and UBC 7 on the sky, we investigate the possibility of the two clusters to be physically related. We aim to recover the present-day stellar membership in the open clusters Collinder 135 and UBC 7 (
Externí odkaz:
http://arxiv.org/abs/2009.02223
Publikováno v:
Astronomy Reports, 2019, Vol. 63, No. 12, pp. 1010-1021
The Vienna Atomic Line Database (VALD) has been supplemented with new data and new functionality -- the possibility of taking into account the effect of hyperfine splitting (HFS) of atomic levels in the analysis of line profiles. This has been done t
Externí odkaz:
http://arxiv.org/abs/1911.03189
Autor:
Piskunov, A. E., Just, A., Kharchenko, N. V., Berczik, P., Scholz, R. -D., Reffert, S., Yen, S. X.
Publikováno v:
A&A 614, A22 (2018)
The all-sky Milky Way Star Clusters (MWSC) survey provides uniform and precise ages and other parameters for a variety of clusters in the Solar Neighbourhood. We construct the cluster age distribution, investigate its spatial variations, and discuss
Externí odkaz:
http://arxiv.org/abs/1802.06779
Autor:
Yen, Steffi X., Reffert, Sabine, Schilbach, Elena, Röser, Siegfried, Kharchenko, Nina V., Piskunov, Anatoly E.
Publikováno v:
A&A 615, A12 (2018)
Open clusters have long been used to gain insights into the structure, composition, and evolution of the Galaxy. With the large amount of stellar data available for many clusters in the Gaia era, new techniques must be developed for analyzing open cl
Externí odkaz:
http://arxiv.org/abs/1802.04234
Autor:
Kovaleva, Dana A., Piskunov, Anatoly E., Kharchenko, Nina V., Röser, Siegfried, Schilbach, Elena, Scholz, Ralf-Dieter, Reffert, Sabine, Yen, Steffi X.
Publikováno v:
A&A 606, L8 (2017)
The global survey of star clusters in the Milky Way (MWSC) is a comprehensive list of 3061 objects that provides, among other parameters, distances to clusters based on isochrone fitting. The Tycho-Gaia Astrometric Solution (TGAS) catalogue, which is
Externí odkaz:
http://arxiv.org/abs/1709.09975
Autor:
Gusev, A. S., Sakhibov, F., Piskunov, A. E., Kharchenko, N. V., Bruevich, V. V., Ezhkova, O. V., Guslyakova, S. A., Lang, V., Shimanovskaya, E. V., Efremov, Yu. N.
We present a study of complexes of young massive star clusters (YMCs), embedded in extragalactic giant HII regions, based on the coupling of spectroscopic with photometric and spectrophotometric observations of about 100 star forming regions in seven
Externí odkaz:
http://arxiv.org/abs/1601.07470
Autor:
Gusev, A. S., Sakhibov, F. Kh., Piskunov, A. E., Kharchenko, N. V., Pilyugin, L. S., Ezhkova, O. V., Khramtsova, M. S., Guslyakova, S. A., Bruevich, V. V., Dodonov, S. N., Lang, V., Shimanovskaya, E. V., Efremov, Yu. N.
Publikováno v:
Astronomical and Astrophysical Transactions, Vol. 29, Issue 3, pp. 293-304 (2016)
We studied 102 star forming regions in seven spiral galaxies (NGC 628, NGC 783, NGC 2336, NGC 6217, NGC 6946, NGC 7331, and NGC 7678) on the basis of complex spectroscopic, photometric (UBVRI) and spectrophotometric (H alpha line) observations. Using
Externí odkaz:
http://arxiv.org/abs/1601.04062