Results 11 to 20 of about 5,935,155 (266)

A RAVE investigation on Galactic open clusters [PDF]

Astronomy & Astrophysics, 2017
Context. It is generally agreed upon that stars form in open clusters (OCs) and stellar associations, but little is known about structures in the Galactic OC population; whether OCs and stellar associations are born isolated or if they prefer to form in groups, for example.
Conrad, C., Scholz, R.-D., Kharchenko, N. V., Piskunov, A. E., Röser, S., Schilbach, E., De Jong, R. S., Schnurr, O., Steinmetz, M., Grebel, E. K., Zwitter, T., Bienaymé, O., Bland-Hawthorn, J., Gibson, B. K., Gilmore, G., Kordopatis, G., Kunder, A., Navarro, J. F., Parker, Q., Reid, W., Seabroke, G., Siviero, A., Watson, F., Wyse, R.   +23 more
openaire   +6 more sources

Improving the open cluster census. II. An all-sky cluster catalogue with Gaia DR3 [PDF]

Astronomy & Astrophysics, 2023
Data from the Gaia satellite are revolutionising our understanding of the Milky Way. With every new data release, there is a need to update the census of open clusters. We aim to conduct a blind, all-sky search for open clusters using 729 million sources
E. L. Hunt, S. Reffert
semanticscholar   +1 more source

A machine-learning-based tool for open cluster membership determination in Gaia DR3 [PDF]

Astronomy & Astrophysics, 2023
Membership studies characterising open clusters with Gaia data, most using DR2, are so far limited at magnitude G = 18 due to astrometric uncertainties at the faint end.
M.G.J. van Groeningen, A. Castro-Ginard, A. Brown, L. Casamiquela, C. Jordi   +4 more
semanticscholar   +1 more source

Rotation and Lithium Confirmation of a 500 pc Halo for the Open Cluster NGC 2516 [PDF]

Astronomical Journal, 2021
Recent analyses of the Gaia data have identified diffuse stellar populations surrounding nearby open clusters. It is important to verify that these “halos,” “tails,” and “strings” are of similar ages and compositions as stars in the denser part of the ...
L. Bouma, J. Curtis, J. Hartman, J. Winn, G. University, Columbia University, A. History, Institute for Advanced Study   +7 more
semanticscholar   +1 more source

Stellar Radial Velocities in the Old Open Cluster M67 (NGC 2682). II. The Spectroscopic Binary Population [PDF]

, 2021
We present and analyze 120 spectroscopic binary and triple cluster members of the old (4 Gyr) open cluster M67 (NGC 2682). As a cornerstone of stellar astrophysics, M67 is a key cluster in the WIYN Open Cluster Study (WOCS); radial-velocity (RV ...
A. Geller, R. Mathieu, D. Latham, Maxwell L. Pollack, G. Torres, E. Leiner   +5 more
semanticscholar   +1 more source

A Review of National and International Online Medical Systems [PDF]

Modern Medicine, 2020
Health and the access to medical services are key factors in the functioning of a sustainable society. In order to provide access to medical and health services, in the conditions of digitalization and implementation of ITC technologies, it is necessary ...
Carmen Catalina RUSU, Viorica BADEA, Luigi Renato MISTODIE, Costica VOICU   +3 more
doaj   +1 more source

Developing an Innovative Web-Based Application for Clusterization in Healthcare - SANINFO [PDF]

Modern Medicine, 2020
The Health Information System is widely used in healthcare contexts and has improved the performance, state, and effectiveness of health services and the overall patient well-being.
Viorica BADEA, Carmen RUSU, Marius GERU, Cosmin STAMATE   +3 more
doaj   +1 more source

The Open Cluster Chemical Abundances and Mapping Survey. IV. Abundances for 128 Open Clusters Using SDSS/APOGEE DR16 [PDF]

Astronomical Journal, 2020
The Open Cluster Chemical Abundances and Mapping (OCCAM) survey aims to constrain key Galactic dynamical and chemical evolution parameters by the construction of a large, comprehensive, uniform, infrared-based spectroscopic data set of hundreds of open ...
J. Donor, P. Frinchaboy, K. Cunha, J. O’Connell, C. Prieto, Andrés Almeida, F. Anders, R. Beaton, D. Bizyaev, J. Brownstein, R. Carrera, C. Chiappini, R. Cohen, D. A. García-Hernández, D. Geisler, S. Hasselquist, H. Jönsson, R. Lane, S. Majewski, D. Minniti, C. M. Bidin, K. Pan, A. Roman-Lopes, J. Sobeck, G. Zasowski   +24 more
semanticscholar   +1 more source

3D kinematics and age distribution of the open cluster population [PDF]

Astronomy & Astrophysics, 2020
Context. Open clusters (OCs) trace the evolution of the Galactic disc with great accuracy. Gaia and large ground-based spectroscopic surveys make it possible to determine their properties and study their kinematics with unprecedented precision. Aims.
Y. Tarricq, C. Soubiran, L.Casamiquela, T. Cantat-Gaudin, L.Chemin, F. Anders, T. Antoja, M. Romero-Gómez, F. Figueras, C. Jordi, A. Bragaglia, L. Balaguer-Núñez, R.Carrera, A. Castro-Ginard, A. Moitinho, P. Ramos, D. B. L. D. D. Bordeaux, U. Bordeaux, Cnrs, Pessac, France, Institut de Ci'encies del Cosmos, U. Barcelona, Barcelona, Spain., Centro de Astronom'ia, U. Antofagasta, Antofagasta, Chile, I. D. A. E. S. D. Spazio, Bologna, Italy, Inaf - Padova, Padova, Centra, F. Ciencias, Universidade de Lisboa, Lisboa, Portugal, Caup Porto, Rua das Estrelas, Porto   +41 more
semanticscholar   +1 more source

Constructing “Closed” and “Open” {Mn₈} Clusters [PDF]

Crystal Growth & Design, 2022
Use of the 1,3,5-tri(2-hydroxyethyl)-1,3,5-triazacyclohexane ligand, LH3, in manganese chemistry affords access to two structurally related {Mn8} clusters: a "closed" {MnIII 6MnII 2} puckered square wheel of formula [Mn8L2(LH)O3(OH)2(MeO)2Br(imH)(H2O)3](Br)3 (1; imH = imidazole) and an "open" {MnIII 8} rod of formula [MnΙΙΙ 8L2O4(aibH)2(aib)2(MeO)6 ...
Thomais G. Tziotzi, Athanasios Mavromagoulos, Mark Murrie, Scott J. Dalgarno, Marco Evangelisti, Euan K. Brechin, Constantinos J. Milios   +6 more
openaire   +6 more sources