Navegação Ciências Exatas e da Terra por Assunto "Grande Nuvem de Magalhães"
Resultados 1-20 de 27
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Ages and metallicities of star clusters and surrounding fiels in the outer disk of the Large Magellanic Cloud
(1998) [Artigo de periódico]We present Washington system CT1 color-magnitude diagrams of 13 star clusters and their surrounding fields that lie in the outer parts of the LMC disk (r>4°), as well as a comparison inner cluster. The total area covered ... -
Analysis of colour-magnitude diagrams of rich LMC clusters : NGC 1831
(2002) [Artigo de periódico]We present the analysis of a deep colour-magnitude diagram (CMD) of NGC 1831, a rich star cluster in the LMC. The data were obtained with HST/WFPC2 in the F555W (~V) and F814W (~I) filters, reaching m555~25. We discuss and ... -
Bar star cluster in the LMC : formation history from UBV integrated photometry
(1992) [Artigo de periódico]The sample of star clusters. in the LMC Bar region with integrated UBV photometry was enlarged by approximately a factor 4, totalling 129 objects. The (B- V) histogram gap between blue and red clusters disappears with this ... -
Carbon stars in lmc clusters revisited
(1996) [Artigo de periódico]Examining the available data for AGB stars in the Large Magellanic Cloud (LMC) clusters, we address the question about the mass interval of low- and intermediate-mass stars which eventually evolve into carbon stars (C ... -
Chemical abundance analysis of three α-poor, metal-poor stars in the ultrafaint dwarf galaxy Horologium I
(2018) [Artigo de periódico]We present chemical abundance measurements of three stars in the ultrafaint dwarf galaxy Horologium I, a Milky Way satellite discovered by the Dark Energy Survey. Using high-resolution spectroscopic observations, we measure ... -
Colour evolution models and the distribution of lmc clusters in the integrated ubv plane
(1993) [Artigo de periódico]We present a comparison between photometric cluster models, based on classical and with-overshooting stellar tracks, and the enlarged sample of 624 LMC clusters recently gathered in integrated UBV photometry by Bica et al. ... -
Constraining the LMC cluster age gap : Washington photometry of NGC 2155 and SL 896 (LW 480)
(2002) [Artigo de periódico]We carried out Washington system photometry of the intermediate-age Large Magellanic Cloud (LMC) star clusters NGC2155 and SL 896 (LW480). We derive ages and metallicities from the T1 versus C - T1 colour–magnitude diagrams ... -
Final stages of N-body star cluster encounters
(2000) [Artigo de periódico]We performed numerical simulations of star cluster encounters with Hernquist's treecode on a CRAY YMP-2E computer. We used different initial conditions (relative positions and velocities, cluster sizes, masses and concentration ... -
Fundamental parameters of the LMC clusters NGC 1836, NGC 1860, NGC 1865, SL 444, LW 224 and SL 548
(2003) [Artigo de periódico]Complementing our recent Washington photometric studies on intermediate age and young Large Magellanic Cloud (LMC) clusters, we now turn our attention to six previously unstudied star clusters in the transition range 200–700 ... -
Hierarchical structures in the Large and Small Magellanic Clouds
(2010) [Artigo de periódico]We investigate the degree of spatial correlation among extended structures in the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC). To this purpose, we work with subsamples characterized by different properties ... -
Integrated UBV photometry of 624 star clusters and associations in the Large Magellanic Cloud
(1996) [Artigo de periódico]We present a catalogof integrated UBV photometry of 504 star clusters and 120 stellar associations in the LMC, part ofthem still embedded in emitting gas. We study age groups in terms of equivalent SWB types derived from ... -
Measurements of the equivalent width of the h/sub beta/ emission line and age determination of hii regions of the lmc and smc
(1981) [Artigo de periódico]The equivalent width of the emission line Hβ was measured photoelectrically in 29 H II regions of the LMC and 2 of the SMC respectively. The age of these regions was obtained through a calibration of Wʜβ. A relation was ... -
A new giant branch clump structure in the Large Magellanic Cloud
(1999) [Artigo de periódico]We present Washington C and T1 CCD photometry of 21 Ðelds located in the northern part of the Large Magellanic Cloud (LMC), and spread over a region of more than 2.5 deg² approximately 6° from the bar. The surveyed areas ... -
A new luminous blue variable : R143 in 30 Doradus
(1993) [Artigo de periódico]We have discovered that R143 in the Large Magellanic Cloud is a luminous blue variable (LBV), the first and perhaps the lone LBV in the central cluster of 30 Doradus, and only the sixth known LMC LBV. Photo metric and ... -
Physical properties of star clusters in the outer LMC as observed by the DES
(2016) [Artigo de periódico]The Large Magellanic Cloud (LMC) harbours a rich and diverse system of star clusters, whose ages, chemical abundances and positions provide information about the LMC history of star formation. We use Science Verification ... -
A revised and extended catalog of Magellanic System clusters, associations, and emission nebulae. II. The Large Magellanic Cloud
(1999) [Artigo de periódico]A survey of extended objects in the Large Magellanic Cloud was carried out on the ESO/SERC R and J Sky Survey Atlases, checking entries in previous catalogs and searching for new objects. The census provided 6659 objects ... -
A revised and extended catalog of Magellanic System clusters, associations, and emission nebulae. I. Small Magellanic Cloud and bridge
(1995) [Artigo de periódico]A survey of extended objects in the Magellanic System was carried out on the ESO ISERC R and J Sky Survey Atlases. The present work is dedicated to the Small Magellanic Cloud and to the inter-Magellanic Cloud region ... -
SMC west halo : a slice of the galaxy that is being tidally stripped? Star clusters trace age and metallicity gradients
(2016) [Artigo de periódico]Context. The evolution and structure of the Magellanic Clouds is currently under debate. The classical scenario in which both the Large and Small Magellanic Clouds (LMC, SMC) are orbiting the Milky Way has been challenged ... -
Spatial distributions of young Large Magellanic Cloud clusters and tracers of a bar pertubation
(1996) [Artigo de periódico]The spatial distributions of SWB I [10<~t(Myr)30]<~ and SWB II [30<~t(Myr)<~70] LMC clusters are analyzed using the enlarged sample of integrated V BV photometry of star clusters and associations published by Bica et ai. ... -
Spectroscopic analysis of the candidate globular clusters NGC 1928 and 1939 in the Large Magellanic Cloud
(1999) [Artigo de periódico]The integrated spectral properties in the range 3600±6700 Å of the candidate old clusters NGC 1928 and 1939 in the LMC bar are compared with those of old-and intermediate-age reference LMC clusters, the properties of which ...
