搜索结果: 1-15 共查到“理学 Open Clusters”相关记录19条 . 查询时间(0.109 秒)
Open clusters in 2MASS photometry - I. Structural and basic astrophysical parameters
associations general – infrared galaxies – astronomical databases
2011/10/21
The main goal of our project is to obtain a complete picture of individual open clusters from homogeneous data and then search for correlations between their astrophysical parameters. The near-infrare...
A Chemical Abundance Study of 10 Open Clusters Based on WIYN-Hydra Spectroscopy
Chemical Abundance Study Clusters Based WIYN-Hydra Spectroscopy
2011/10/12
We present a detailed chemical abundance study of evolved stars in 10 open clusters based on Hydra multi-object echelle spectra obtained with the WIYN 3.5m telescope. From an analysis of both equivale...
Chemical abundance analysis of the Open Clusters Berkeley 32, NGC 752, Hyades and Praesepe
Stars: abundances – Galaxy: disc – Galaxy: open clusters and associations: individual: NGC 752 Hyades Berkeley 32 Preasepe (M 44)
2011/10/8
Context. Open clusters are ideal test particles to study the chemical evolution of the Galactic disc. However the existing high-resolution abundance determinations, not only of [Fe/H], but also of oth...
An asteroseismic membership study of the red giants in three open clusters observed by Kepler: NGC6791, NGC6819, and NGC6811
asteroseismic membership study red giants clusters observed Kepler
2011/9/29
Studying star clusters offers significant advances in stellar astrophysics due to the combined power of having many stars with essentially the same distance, age, and initial composition. This makes c...
Amplitudes of solar-like oscillations: constraints from red giants in open clusters observed by Kepler
Amplitudes solar-like oscillations: constraints clusters observed Kepler
2011/9/27
Scaling relations that link asteroseismic quantities to global stellar properties are important for gaining understanding of the intricate physics that underpins stellar pulsation. The common notion t...
The Principal Parameters of Unstudied Open Clusters with NIR Observations
Principal Parameters of Unstudied Open Clusters NIR Observations
2010/11/15
We studied the principal parameters of some previously unstudied open star clusters using the JHK Near-IR photometry (2MASS survey). These clusters have been selected from the updated Catalogs of Dais...
The fractal spatial distribution of stars in open clusters and stellar associations
ISM structure open clusters and associations general stars formation
2010/11/11
The Interstellar Medium has a fractal structure, in the sense that gas and dust distribute in a hierarchical and self-similar manner. Stars in new-born cluster probably follow the same fractal pattern...
Chemically Peculiar A/F Stars in Open Clusters of the Milky Way
stars: abundances - stars main sequence - stars rotation - diffusion - Galaxy
2010/11/12
Abundance anomalies have been determined at the surface of many field and open cluster A
and F dwarfs. These abundance anomalies are most likely caused by microscopic diffusion at work within the sta...
Old open clusters and the Galactic metallicity gradient: Berkeley 20, Berkeley 66, and Tombaugh 2
Galaxy disc – Hertzsprung-Russell (HR) diagram – open clusters and associations
2010/11/15
To study the crucial range of Galactocentric distances between 12 and 16 kpc, where little
information is available, we have obtained V I CCD imaging of Berkeley 20 and BV I CCD
imaging of Berkeley ...
The evolution of luminosity, colour and the mass-to-luminosity ratio of Galactic open clusters: comparison of discrete vs. continuous IMF models
Galaxy Astrophysics (astro-ph.GA)
2010/12/29
We found in previous studies that standard Simple Stellar Population (SSP) models are unable to describe or explain the colours of Galactic open clusters both in the visible and in the NIR spectral ra...
Metallicities of Young Open Clusters I: NGC 7160 and NGC 2232
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/24
We present a moderate-resolution spectroscopic analysis of the 10-25 Myr clusters NGC 7160 and NGC 2232, using observations obtained with the WIYN 3.5-m telescope. Both NGC 7160 and NGC 2232 are found...
On the nature of the open clusters in the direction of ngc 6882/5
open clusters ngc 6882/5
2009/7/10
On the nature of the open clusters in the direction of ngc 6882/5。
Photometric monitoring of binaries in open clusters and Associations：ngc6231
Photometric monitoring binaries in open clusters ngc6231
2009/6/17
Photometric monitoring of binaries in open clusters and Associations：ngc6231。
Spectroscopic binaries in southern open clusters
Spectroscopic binaries southern open clusters
2009/6/16
Spectroscopic binaries in southern open clusters。
CCD Photometry of the Open Clusters NGC 2658, NGC 2849, and NGC 3247
Open Clusters NGC 2658 NGC 2849 NGC 3247
2009/6/16
CCD Photometry of the Open Clusters NGC 2658, NGC 2849, and NGC 3247。