منابع مشابه
HRI observations of the intermediate - age open cluster IC 4756
We have obtained an 88 kilosecond ROSAT HRI exposure of the intermediate-age open cluster IC 4756 with the purpose of detecting stars in the high luminosity tail (log L X ≥ 10 29 erg s −1) of its X-ray luminosity distribution. However, only 1 cluster member (HSS 201) out of the 60 members inside the central high-sensitivity region of the HRI field of view (FOV) was detected. This star has spect...
متن کاملDetailed chemical composition of the open cluster IC 4651 : The iron peak , α elements , and Li . ⋆
Detailed chemical composition of the open cluster IC 4651: The iron peak, α elements, and Li. Abstract. We present a detailed chemical analysis of 22 stars along the colour-magnitude sequence of the intermediate-age (1.7 Gyr) open cluster IC 4651, based on high-resolution, high S/N ratio spectra from UVES/VLT. IC 4651 thus becomes one of the few open clusters for which a detailed composition an...
متن کاملDetection of the lithium depletion boundary in the young open cluster IC 4665 ⋆
Context. The so-called lithium depletion boundary (LDB) provides a secure and independent tool for deriving the ages of young open clusters. Aims. In this context, our goal is to determine membership for a sample of 147 photometrically selected candidates of the young open cluster IC 4665 and to use confirmed members to establish an age based on the LDB. Methods. Employing the FLAMES multi-obje...
متن کاملQuantitative Stellar Spectral Classification . Iv . Application to the Open Cluster Ic 2391
In this work we perform the first test of a stellar spectral classification method (Stock & Stock 1999) by applying it to early type stars. The sample of stars are the members of the open cluster IC 2391 that have high-resolution spectra available in the UVES Project of Paranal Observatory. We show that, in general, absolute magnitudes M V and intrinsic colors (B − V) 0 can be recovered within ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1969
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/146.2.101