Navegação Ciências Exatas e da Terra por Autor "Momany, Yazan"
Resultados 1-13 de 13
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B and V photometry of the metal-rich bulge globular cluster NGC 6304
(2000) [Artigo de periódico]We presentBandVphotometry of the bulge globular cluster NGC 6304. We derive a reddening E(B-V) 0.5 and a distance from the Sun d 6 kpc. From the red giant branch morphology we estimate that the metallicity of NGC 6304 is ... -
Colour-magnitude diagrams of the inner halo globular clusters NGC 5986 and NGC 6712
(2000) [Artigo de periódico]We present V and I photometry for NGC 5986 and B and V for NGC 6712. NGC 5986 has a blue extended horizontal branch, while NGC 6712 has a composite red and blue horizontal branch, where the latter extends to unusual bluer ... -
A fossil bulge globular cluster revealed by very large telescope multi-conjugate adaptive optics
(2011) [Artigo de periódico]The globular cluster HP 1 is projected on the bulge, very close to the Galactic center. The Multi-Conjugate Adaptive Optics Demonstrator on the Very Large Telescope allowed us to acquire high-resolution deep images that, ... -
High-resolution abundance analysis of red giants in the metal-poor bulge globular cluster HP 1
(2016) [Artigo de periódico]Context. The globular cluster HP 1 is projected at only 3 :33 from the Galactic center. Together with its distance, this makes it one of the most central globular clusters in the Milky Way. It has a blue horizontal branch ... -
Multi-conjugate adaptive optics VLT imaging of the distant old open cluster FSR 1415
(2008) [Artigo de periódico]We employ the recently installed near-infrared Multi-Conjugate Adaptive Optics demonstrator (MAD) to determine the basic properties of a newly identified, old and distant, Galactic open cluster (FSR 1415). The MAD facility ... -
NTT infrared imaging of star cluster candidates towards the central parts of the Galaxy
(2003) [Artigo de periódico]We address the issue whether the central parts of the Galaxy harbour young clusters other than Arches, Quintuplet and the Nuclear Young Cluster. A large sample of centrally projected cluster candidates has been recently ... -
A pair of reddened young star clusters in Centaurus northern sample
(2004) [Artigo de periódico]Photometry in the BVI and JHK bands is presented for the first time for the southern open clusters Danks 1 and 2, located in the Centaurus region. They are relatively rich and compact, and projected at approximately 4 ... -
The metal content of the bulge globular cluster NGC 6528
(2004) [Artigo de periódico]High resolution spectra of five stars in the bulge globular cluster NGC 6528 were obtained at the 8m VLT UT2-Kueyen telescope with the UVES spectrograph. Out of the five stars, two of them showed evidence of binarity. The ... -
The very reddened open clusters Pismis 23 (Lynga 10) and Stephenson 2
(2002) [Artigo de periódico]Pismis 23 and Stephenson 2 are two very reddened open clusters, projected close to the Galactic plane. We present VI and JH photometry for Pismis 23 and I and Gunn z for Stephenson 2. We derive a relatively old age of ~ ... -
V, J, H and K imaging of the metal rich globular cluster NGC 6528 : reddening, metallicity, and distance based on cleaned colour-magnitude diagrams
(2003) [Artigo de periódico]New near-infrared observations of NGC6528 are presented. The JHKs observations complement a previous HST/NICMOS data set by Ortolani et al. (2001), in that they sample a larger area, contain a more numerous sample of red ... -
VLT-UVES abundance analysis of four giants in NGC 6553
(2006) [Artigo de periódico]Context. Metal-rich globular clusters trace the formation of bulges. Abundance ratios in the metal-rich globular clusters such as NGC 6553 can constrain the formation timescale of the Galactic bulge. Aims. The purpose of ... -
VLT-UVES analysis of 5 giants in 47 Tucanae
(2005) [Artigo de periódico]High resolution spectra of 5 giants, including a horizontal branch star, of the metal-rich globular cluster 47 Tucanae were obtained with the UVES spectrograph at the 8m VLT UT2-Kueyen telescope. The atmospheric parameters ... -
VLT-UVES analysis of two giants in the bulge metal-poor globular cluster HP-1
(2006) [Artigo de periódico]Context. Metal-poor globular clusters in the bulge are important tracers of early chemical evolution. HP-1 is among the six metal-poor clusters within 5. of the Galactic center, and could be the one closest to the center ...
