Browsing by Subject "Nebulosas"
Now showing items 1-14 of 14
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Ages and metallicities of circumnuclear star formation regions from Gemini IFU observations
(2008) [Journal article]Aims. We derive the age and metallicity of circumnuclear star formation regions (CNSFRs) located in the spiral galaxies NGC6951 and NGC1097 and investigate the cause of the very low equivalent widths of emission lines found ... -
A catalogue of dust clouds in the Galaxy
(2002) [Journal article]In this study 21 catalogues of dust clouds in the Galaxy were cross-identified by taking into account available properties such as position, angular dimensions, opacity class and velocity. An initial list of ≈6500 entries ... -
Distribuição de extinção na Galáxia e nas Nuvens de Magalhães
(2001) [Thesis]o estudo da distribuição de extinção na Galáxia e nas Nuvens de Magalhães é feito através da análise dos mapas de avermelhamento derivados da emissão 100f-Lmda poeira E(B- V)FIR de Schlegel et ai. (1998). Comparamos valores ... -
Estágios iniciais de aglomerados estelares
(2005) [Thesis]Analisamos aglomeradosimersosem nuvens moleculares, os quais são fundamentais para a compreensão dos estágios evolutivos iniciais da formação estelar. Na presente tese exploramos principalmente objetos associados a nebulosas ... -
Estudo do meio interestelar através de estrelas anãs brancas
(2012) [Work completion of graduation]A luz emitida pelas estrelas é espalhada pelas partículas do meio interestelar ao se propagar através dele. Isso causa a extinção da luz e deixa os espectros observados “mais avermelhados”. A extinção deve ser levada em ... -
A method for simultaneous determination of A/sub v/ and R and applications
(2003) [Journal article]A method for the simultaneous determination of the interstellar extinction (AV) and of the ratio of total to selective extinction (R), derived from the 1989 Cardelli, Clayton, & Mathis fitting of the interstellar extinction ... -
Mortality and dust expulsion in early phases of stellar clusters : evidence from NIR photometry of nearby, spiral galaxies
(2013) [Journal article]Context. It is often argued that young stellar clusters suffer a significant infant mortality that is partly related to the expulsion of dust and gas in their early phases caused by radiation pressure from hot stars and ... -
New infrared star clusters in the Northern and Equatorial Milky Way with 2MASS
(2003) [Journal article]We carried out a survey of infrared star clusters and stellar groups on the 2MASS J, H and Ks all-sky release Atlas in the Northern and Equatorial Milky Way (350◦ < < 360◦, 0◦ < < 230◦). The search in this zone complements ... -
A new luminous blue variable : R143 in 30 Doradus
(1993) [Journal article]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 ... -
On the crucial cluster Andrews-Lindsay 1 and a 4% distance solution for its planetary nebula
(2014) [Journal article]Andrews-Lindsay 1 is a pertinent open cluster because it may host the planetary nebula (PN) PHR 1315-6555, yet ambiguities linger concerning its fundamental parameters (>50% scatter). New multiband BVJHW1−4 photometry for ... -
Photometric and spectroscopic study of low mass embedded star clusters in reflection nebulae
(2005) [Journal article]An analysis of the candidate embedded stellar systems in the reflection nebulae vdBH-RN 26, vdBH-RN 38, vdBH-RN 53a, GGD 20, ESO 95-RN 18 and NGC 6595 is presented. Optical spectroscopic data from CASLEO (Argentina) in ... -
A revised and extended catalog of Magellanic System clusters, associations, and emission nebulae. II. The Large Magellanic Cloud
(1999) [Journal article]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) [Journal article]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 ... -
The embedded star clusters in the nebulae NGC 2327 and BRC 27 in Canis Majoris R1
(2002) [Journal article]We employed J, H and Ks photometry from the 2MASS Catalogue to study the embedded star clusters in the nebulae NGC 2327 and BRC 27 locate in the molecular cloud Canis Majoris R1. We made use of colour-colour and colour-magnitudes ...