منابع مشابه
Globular Clusters in the Galactic Bulge
A view of the Galactic bulge by means of their globular clusters is fundamental for a deep understanding of its formation and evolution. Connections between the globular cluster and field star properties in terms of kinematics, orbits, chemical abundances, and ages should shed light on different stellar population components. Based on spatial distribution and metallicity, we define a probable b...
متن کاملBulge Globular Clusters in Spiral Galaxies
There is now strong evidence that the metal-rich globular clusters (GC) near the center of our Galaxy are associated with the Galactic bulge rather than the disk as previously thought. Here we extend the concept of bulge GCs to the GC systems of nearby spiral galaxies. In particular, the kinematic and metallicity properties of the GC systems favor a bulge rather than a disk origin. The number o...
متن کاملNear–ir Properties of 24 Globular Clusters in the Galactic Bulge
Received ; accepted – 2 – ABSTRACT We present near–IR Color–Magnitude Diagrams and physical parameters for a sample of 24 Galactic Globular Clusters toward the Bulge direction. In this paper we discuss the properties of twelve new clusters (out of 24) in addition to those previously studied and published by our group. The compilation includes measurements of the cluster reddening, distance, pho...
متن کاملHigh resolution infrared spectra of NGC 6440 and NGC 6441 : ⋆ two massive Bulge Globular Clusters
Using the NIRSPEC spectrograph at Keck II, we have obtained infrared echelle spectra covering the 1.5 − 1.8 μm range for giant stars in the massive bulge globular clusters NGC 6440 and NGC 6441. We report the first high dispersion abundance for NGC 6440, [Fe/H]=−0.56±0.02 and we find [Fe/H]=−0.50±0.02 for the blue HB cluster NGC 6441. We measure an average α-enhancement of ≈ +0.3 dex in both cl...
متن کامل1 High resolution infrared spectra of bulge globular clusters : Liller 1 and NGC 6553
Using the NIRSPEC spectrograph at Keck II, we have obtained echelle spectra covering the range 1.5 − 1.8 μm for 2 of the brightest giants in Liller 1 and NGC 6553, old metal rich globular clusters in the Galactic bulge. We use spectrum synthesis for the abundance analysis, and find [Fe/H] = −0.3 ± 0.2 and [O/H] = +0.3± 0.1 (from the OH lines) for the giants in both clusters. We measure strong l...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 2002
ISSN: 0074-1809
DOI: 10.1017/s0074180900223322