Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Roeser, Siegfried"'
Gaia characterizes the stellar populations of nearby open clusters with unprecedented precision. We investigate the B\"ohm-Vitense gap, which has been found as a prominent feature in the stellar sequence of open clusters. Using PARSEC isochrone fitti
Externí odkaz:
http://arxiv.org/abs/2410.16369
Autor:
Röser, Siegfried, Schilbach, Elena
Publikováno v:
A&A 638, A9 (2020)
Within a 400~pc sphere around the Sun, we search for members of the Pisces-Eridanus (Psc-Eri) stellar stream in the Gaia Data Release 2 (DR2) data set. We compare basic astrophysical characteristics of the stream with those of the Pleiades. We used a
Externí odkaz:
http://arxiv.org/abs/2002.03610
Autor:
Röser, Siegfried, Schilbach, Elena
Publikováno v:
A&A 627, A4 (2019)
Within a 400 pc sphere around the Sun, we search for Praesepe's tidal tails in the Gaia DR2 dataset. We used a modified convergent-point method to search for stars with space velocities close to the space velocity of the Praesepe cluster. We find a c
Externí odkaz:
http://arxiv.org/abs/1903.08610
Publikováno v:
A&A 621, L2 (2019)
Within a 200 pc sphere around the Sun we search for the Hyades tidal tails in the Gaia DR2 dataset. We use a modified convergent point method to search for stars with space velocities close to the space velocity of the Hyades cluster. We find a clear
Externí odkaz:
http://arxiv.org/abs/1811.03845
Scorpius-Centaurus is the nearest OB association and its hundreds of members were divided into sub-groups, including Lower Centaurus Crux. Here we study the dynamics of the Lower Centaurus Crux area stellar content. We report the revelation of a larg
Externí odkaz:
http://arxiv.org/abs/1807.02076
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:
Röser, Siegfried, Schilbach, Elena, Goldman, Bertrand, Henning, Thomas, Moor, Attila, Derekas, Aliz
Publikováno v:
A&A 614, A81 (2018)
Aims. We are searching for new open clusters or moving groups in the Solar neighbourhood. Methods. We used the Gaia-TGAS catalogue, cut it into narrow proper motion and parallax slices and searched for significant spatial over-densities of stars in e
Externí odkaz:
http://arxiv.org/abs/1712.10143
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
Publikováno v:
A&A 600, L4 (2017)
Recently, the first installment of data from ESA's Gaia astrometric satellite mission (Gaia-DR1) was released, containing positions of more than 1 billion stars with unprecedented precision, as well as only proper motions and parallaxes, however only
Externí odkaz:
http://arxiv.org/abs/1701.02629
Publikováno v:
A&A 595, A22 (2016)
One of the results of the Milky Way Star Clusters (MWSC) survey by Kharchenko et al. (2013) was the detection of a slight under-density of old (ca. 1 Gyr) clusters within the nearest kilo-parsec from the Sun. This under-density may be due to an ineff
Externí odkaz:
http://arxiv.org/abs/1608.02704