Results 21 to 30 of about 7,279,840 (415)

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

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, Andres 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, I. Padova, Padova, Centra, F. Ciencias, Universidade de Lisboa, Lisboa, Portugal, Caup Porto, Rua das Estrelas, Porto   +41 more
semanticscholar   +1 more source

The disintegrating old open cluster Czernik 3 [PDF]

Monthly notices of the Royal Astronomical Society, 2020
We have performed a detailed analysis of the Czernik 3 (Cz3) open cluster by using deep near-infrared photometry taken with TIRCAM2 on the 3.6 m Devasthal optical telescope along with the recently available high-quality proper motion data from the Gaia
Saurabh Sharma, Arpan Ghosh, D. Ojha, R. Pandey, T. Sinha, Arun Kumar Pandey, S. K. Ghosh, N. Panwar, S. B. Pandey   +8 more
semanticscholar   +1 more source

WIYN Open Cluster Study. LXXXII. Radial-velocity Measurements and Spectroscopic Binary Orbits in the Open Cluster NGC 7789 [PDF]

Astronomical Journal, 2020
We present an extensive time-series radial-velocity (RV) survey of stars in the rich open cluster NGC 7789 (1.6 Gyr, [Fe/H] = +0.02). The stellar sample lies within an 18′ circular radius from the cluster center (10 pc in projection, or about 2 core ...
Andrew C. Nine, K. Milliman, R. Mathieu, A. Geller, E. Leiner, I. Platais, B. Tofflemire   +6 more
semanticscholar   +1 more source

Effects of Astaxanthin on The Skin Color of Green Swordtail, Xyphophorus helleri [PDF]

E3S Web of Conferences, 2020
This study aimed to analyze the effects of astaxanthin in commercial feed on growth and color intensity of green swordtail fish, Xyphophorus helleri. A total of 150 green swordtail fish (Xyphophorus helleri) had an average weight of ± 2 g per fish was ...
Putra Dedi F., Qadri Ahmad, El-Rahimi Sayyid A., Othman Norhayati   +3 more
doaj   +1 more source

Exploring open cluster properties with Gaia and LAMOST [PDF]

Astronomy & Astrophysics, 2020
Context. In Gaia DR2, an unprecedented high level of precision has been reached at sub-milliarcsecond for astrometry and millimagnitudes for photometry.
J. Zhong, Li Chen, Di Wu, Lu Li, Leya Bai, J. Hou   +5 more
semanticscholar   +1 more source

Analysis of the Open Cluster NGC 2281

Galaxies, 2021
BV observations of an approximately 68′×48′ field centered on the open cluster NGC 2281 and covering more than 400 nights from 2013 to 2018 are presented.
Dirk Terrell, John Gross, Walter R. Cooney   +2 more
doaj   +1 more source

Eclipsing Binaries in Open Clusters [PDF]

Astrophysics and Space Science, 2006
AbstractDetached eclipsing binaries are very useful objects for calibrating theoretical stellar models and checking their predictions. Detached eclipsing binaries in open clusters are particularly important because of the additional constraints on their age and chemical composition from their membership of the cluster.
Barry Smalley, Pierre F. L. Maxted, John Southworth   +2 more
openaire   +8 more sources

Newly detected open clusters in the Galactic disk using Gaia EDR3 [PDF]

A&A 660, A4 (2022), 2022
The astrometric satellite Gaia recently released part of its third data set, which provides a good opportunity to hunt for more open clusters in the Milky Way. In this work, we conduct a blind search for open clusters in the Galactic disk using a sample-based clustering search method with high spatial resolution, which is especially suited to finding ...
arxiv   +1 more source