1,721,154 research outputs found
Star clusters in the Carina complex: UBVRI photometry of NGC 3114, Collinder 228 and vdB-Hagen 99
Full text linkWe report on UBVRI photometry of two 5' x 5' fields in the region of the young open cluster NGC 3324. One of our fields covers the core region, while the other is closer to the tidal radius of the cluster. Our study provides the first CCD photometry of NGC 3324. We find that the cluster is very young and probably contains several pre Main Sequence (MS) stars. 25 members are identified on the basis of their position in the (U-B) vs. (B-V) diagram. We investigate the relation of the red super-giant HD 92207 with NGC 3324, suggesting that it probably does not belong to the cluster. Our second field is close to Loden 165, a possible cluster of stars that has never been studied so far. We show that this object is a probable open cluster, much older than NGC 3324 and much closer to the Su
A crooked spinning black hole
No full text: New observations challenge the current understanding of black hole formation
Young Open Clusters in the Carina Region
No full textWe present results of a new investigation (Carraro et al. 2002) aimed at clarifying the mutual relationship between the three most prominent young open clusters close to η Carinæ, namely Trumpler 16, Trumpler 14 and Collinder 232
Metal Abundances in Extremely Distant Galactic Old Open Clusters. II. Berkeley 22 and Berkeley 66
Full text linkWe report on high-resolution spectroscopy of four giant stars in the Galactic old open clusters Berkeley 22 and Berkeley 66 obtained with HIRES at the Keck telescope. We find that [Fe/H] = -0.32 ± 0.19 and -0.48 ± 0.24 for Be 22 and Be 66, respectively. Based on these data, we first revise the fundamental parameters of the clusters and then discuss them in the context of the Galactic disk radial abundance gradient. We found that both clusters nicely obey the most updated estimate of the slope of the gradient from the work of Friel and coworkers and are genuine Galactic disk objects. © 2005. The American Astronomical Society. All rights reserved
Star clusterings in the Carina complex: UBVRI photometry of NGC 3324 and Loden 165
Full text linkWe report on UBVRI photometry of two fields in the region of the young open cluster NGC 3324.
One of our fields covers the
core region, while the other is closer to the tidal radius of the cluster.
Our study provides the first CCD photometry of NGC 3324.
We find that the cluster is very young and probably
contains several pre Main Sequence
(MS) stars. 25 members are identified on the basis of their position
in the vs. diagram.
We investigate the relation of the red super-giant HD 92207 with NGC 3324,
suggesting that it probably does not belong to the cluster.
Our second field is close to Loden 165, a possible cluster of stars
that has never been studied
so far. We show that this object is a probable open cluster, much older than
NGC 3324 and much closer to the Sun
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