Navegação Ciências Exatas e da Terra por Autor "Dutra, Carlos Maximiliano"
Resultados 1-20 de 23
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Background galaxies as reddening probes throughout the Magellanic Clouds
(2001) [Artigo de periódico]We study the spectral properties in the range 3600 Å - 6800 Å of the nuclear region of galaxies behind the Magellanic Clouds. The radial velocities clari ed the nature of the objects as background galaxies or extended ... -
A catalogue of dust clouds in the Galaxy
(2002) [Artigo de periódico]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 ... -
A catalogue of infrared star clusters and stellar groups
(2003) [Artigo de periódico]We compiled a catalogue of infrared star clusters in the Galaxy, which are most of them embedded. It condenses the growing literature information. We also include in the sample infrared stellar groups which are less dense ... -
Dating star clusters in the Small Magellanic Cloud by means of integrated spectra
(2002) [Artigo de periódico]In this study flux-calibrated integrated spectra in the range (3600–6800) Å are presented for 16 concentrated star clusters in the Small Magellanic Cloud (SMC), approximately half of which constitute unstudied objects. We ... -
Discovery of three optical open clusters in the Galaxy
(2004) [Artigo de periódico]We report the discovery of three optical open clusters in the Milky Way. Two clusters are in Scutum (Cluster 1 at = 18.44° and b = −0.42°, and Cluster 2 at l= 19.60° and b = −1.02°), thus projected not far from the Galactic ... -
Dissolving star cluster candidates
(2001) [Artigo de periódico]We present a list of 34 neglected entries from star cluster catalogues located at relatively high galactic latitudes (|b| > 15º) which appear to be candidate late stages of star cluster dynamical evolution. Although ... -
Does Cyg OB2 harbour any open cluster?
(2003) [Artigo de periódico]We report the detection of three new open cluster candidates located in Cygnus. Two of them are projected near the center of the rich compact association CygOB2. These two objects have been found during an optical inspection ... -
Extinction within 10 of the Galactic centre using 2MASS
(2003) [Artigo de periódico]We extract J and Ks magnitudes from the 2MASS Point Source Catalog for approximately 6×106 stars with 8 < - Ks < - 13 in order to build an AK extinction map within 10◦ of the Galactic centre. The extinction was determined ... -
Foreground and background dust in star cluster directions
(2000) [Artigo de periódico]This paper compares reddening values E(B-V) derived from the stellar content of 103 old open clusters and 147 globular clusters of the Milky Way with those derived from DIRBE/IRAS 100 μm dust emission in the same directions. ... -
A general catalogue of extended objects in the Magellanic System
(2008) [Artigo de periódico]We update the Small Magellanic Cloud (SMC), Bridge and Large Magellanic Cloud (LMC) catalogues of extended objects that were constructed by members of our group from 1995 to 2000. In addition to the rich subsequent literature ... -
Investigating the boderline between a young star cluster and a small stellar association : a test case with Bochum 1
(2008) [Artigo de periódico]Context. Usually, a loose stellar distribution can be classified as an OB stellar group, an association, or a young open cluster. We compare data with the typical OB association Vul OB1. Aims. Here, we discuss the nature ... -
Low-extinction windows in the inner Galactic Bulge
(2002) [Artigo de periódico]We built K band extinction maps in the area of two candidate low-extinction windows in the inner Bulge: W0.2-2.1 at (l, b) = (0.25°, –2.15° ), and W359.4-3.1 at (l, b) = (359.40°, −3.10°). We employed JH Ks photometry from ... -
New infrared star clusters and candidates in the Galaxy detected with 2MASS
(2001) [Artigo de periódico]A sample of 42 new infrared star clusters, stellar groups and candidates was found throughout the Galaxy in the 2MASS J, H and especially KS atlases. In the Cygnus X region 19 new clusters, stellar groups and candidates ... -
New infrared star clusters in the Northern and Equatorial Milky Way with 2MASS
(2003) [Artigo de periódico]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 ... -
New infrared star clusters in the southern Milky Way with 2MASS
(2003) [Artigo de periódico]We carried out a 2MASS J, H and Ks survey of infrared star clusters in the Milky Way sector 230º < l < 350º . This zone was the least studied in the literature, previously including only 12 infrared clusters or stellar ... -
New star clusters projected close to the galactic centre
(2000) [Artigo de periódico]Abstract. We carried out a systematic search for new star clusters in a field of 5 5 centred close to the Galactic Nucleus using the infrared JHKs 2MASS Survey archive. In addition we searched for embedded clusters in the ... -
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 ... -
On the calibration of the COBE/IRAS dust emission reddening maps
(2003) [Artigo de periódico]In this work we study the spectral properties (3600–6800 Å) of the nuclear region of early-type galaxies at low (|b| < 25◦), intermediate (including surroundings of the Magellanic Clouds) and high (South Polar Cap) Galactic ... -
Open clusters or their remnants : B and V photometry of NGC 1901 and NGC 1252
(2001) [Artigo de periódico]Photometry in the B and V bands is presented for the southern stellar groups NGC1901 and NGC1252. NGC1901 is often described as an open cluster while NGC 1252 consists of a concentration of about 20 stars centered ≈ 20' ... -
Reddening and age for 13 southern Galactic open clusters determined from integrated spectra
(2001) [Artigo de periódico]In this study we present flux-calibrated integrated spectra in the range 3800–6800 Å for 13 concentrated open clusters with Galactic longitudes between 219° and 316°, nine of which have not been previously studied. Using ...
