Navegação Ciências Exatas e da Terra por Assunto "HR diagram"
Resultados 1-7 de 7
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Bh 176 and am-2 : globular or open clusters?
(1995) [Artigo de periódico]We have obtained VI photometry for two low Galactic latitude star clusters: BH 176 and AM-2, using the 2.2 m and the 3.5 m NTT telescopes at ESO. Their VI colour-magnitude diagrams reveal that: BH 176 may be a globular ... -
High quality seeing V, I and Gunn z imaging of Terzan 4 : a blue horizontal branch bulge globular cluster
(1997) [Artigo de periódico]We study the globular cluster Terzan 4 projected close to the Galactic center, by means of V, I and Gunn z Colour-Magnitude Diagrams. The images were obtained under exceptional seeing conditions (0.35" - 0.55") at the ESO ... -
Infrared array photometry of bulge globular clusters I. Combined ground based JK and HST VI photometry of NGC 6553
(1998) [Artigo de periódico]JK infrared photometry for the bulge globular cluster NGC 6553, combined with high resolution visual VI observations are presented and discussed in connection with the bulge metal rich population. The infrared data were ... -
NGC 6522 : an intermediate metallicity globular cluster projected on the baade window
(1994) [Artigo de periódico]We studied NGC 6522 colour magnitude diagrams using CCD photometry with BV filters. We have carefully estimated the reddening, which is criticai for Baade Window studies, obtaining E(B-V) = 0.55. We derive for this ... -
Ntt vi photometry of the metal-rich and obscured bulge globular cluster terzan 5
(1996) [Artigo de periódico]We study the metal-rich bulge globular cluster Terzan 5 by means of VI colour-magnitude diagrams, with images obtained under exceptional seeing conditions (0.34"–0.50"). Differential reddening is important across the ... -
The globular cluster ngc 6540
(1994) [Artigo de periódico]We have carried out U BV I and Gunn z CCD photometry and integrated spectroscopy in the range λλ3700-10 000 Å of NGC 6540, which was previously classified as an open cluster. The observations indicate that we are dealing ... -
V, i photometry of the metal-rich bulge globular cluster terzan 2
(1997) [Artigo de periódico]We present for the rst time optical colour magnitude diagrams of the globular cluster Terzan 2, in the V, I colours. The horizontal branch is red. The red giant branch morphology can be fitted with that of 47 Tuc, but ...
