Results 41 to 50 of about 7,279,840 (415)
Some two-dimensional finite energy percolation processes [PDF]
, 2009 Some examples of translation invariant site percolation processes on the $\Z^2$ lattice are constructed, the most far-reaching example being one that satisfies uniform finite energy (meaning that the probability that a site is open given the status of ...
Hägström, Olle, Mester, Péter
core +2 more sources
Formation of Open Clusters [PDF]
Symposium - International Astronomical Union, 1980 A forming star progresses through several evolutionary stages which are marked by different observational signs that can be identified by different techniques. Stellar birth from interstellar matter occurs in dense, cold clouds of gas due to a local increase in the density and interstellar clouds composed of molecules and grains are the preferential ...
openaire +2 more sources
Binary open clusters in the Gaia data [PDF]
A&A 666, A75 (2022), 2022 Context. Observations indicate that the fraction of potential binary star clusters in the Milky Way is either the same or lower than that of the Magellanic Clouds. The unprecedented precision in the parallax measurements by Gaia has allowed for the discovery of a growing number of new binary open clusters (OCs). Aims. We aim to survey the candidates of
arxiv +1 more source
A Gaia study of the Hyades open cluster [PDF]
, 2018 We present a study of the membership of the Hyades open cluster, derive kinematically-modelled parallaxes of its members, and study the colour-absolute magnitude diagram of the cluster.
Stella Reino +4 more
semanticscholar +1 more source
Cluster aggregates surrounding Pismis 5 in the Vela Molecular Ridge [PDF]
A&A 675, A67 (2023), 2023 Context. In the Gaia era, the precision of astrometric data is unprecedented. High-quality data make it easier to find more cluster aggregates and support further confirmation of these open clusters. Aims. We use Gaia DR3 to redetermine the open clusters surrounding Pismis 5 in the Vela Molecular Ridge. We also investigate the basic properties of these
arxiv +1 more source
The Hyades open cluster is chemically inhomogeneous [PDF]
, 2016 We present a high-precision differential abundance analysis of 16 solar-type stars in the Hyades open cluster based on high resolution, high signal-to-noise ratio (S/N ~ 350 - 400) spectra obtained from the McDonald 2.7m telescope.
Fan Liu +4 more
semanticscholar +1 more source
The young open cluster Berkeley 55 [PDF]
, 2011 We present UBV photometry of the highly reddened and poorly studied open cluster Berkeley 55, revealing an important population of B-type stars and several evolved stars of high luminosity.
Amparo Marco +31 more
core +3 more sources
The GAPS programme with HARPS-N at TNG XI. Pr~0211 in M~44: the first multi-planet system in an open cluster [PDF]
, 2016 Open cluster (OC) stars share the same age and metallicity, and, in general, their age and mass can be estimated with higher precision than for field stars.
L. Malavolta +59 more
semanticscholar +1 more source
WIYN Open Cluster Study. XXXVIII. Stellar Radial Velocities in the Young Open Cluster M35 (NGC 2168) [PDF]
, 2009 We present 5201 radial-velocity measurements of 1144 stars, as part of an ongoing study of the young (150 Myr) open cluster M35 (NGC 2168). We have observed M35 since 1997, using the Hydra Multi-Object Spectrograph on the WIYN 3.5m telescope. Our stellar
Aaron M. Geller +27 more
core +1 more source
The chemical compositions of solar twins in the open cluster M67 [PDF]
, 2016 Stars in open clusters are expected to share an identical abundance pattern. Establishing the level of chemical homogeneity in a given open cluster deserves further study as it is the basis of the concept of chemical tagging to unravel the history of ...
Fan Liu +9 more
semanticscholar +1 more source