scholarly journals Star formation in the outer Galaxy: membership and fundamental parameters of the young open cluster NGC 1893

2011 ◽  
Vol 527 ◽  
pp. A77 ◽  
Author(s):  
L. Prisinzano ◽  
J. Sanz-Forcada ◽  
G. Micela ◽  
M. Caramazza ◽  
M. G. Guarcello ◽  
...  
Keyword(s):  
Star Formation ◽  
Open Cluster ◽  
Fundamental Parameters ◽  
Young Open Cluster

scholarly journals A new look at Sco OB1 association with Gaia DR2

2020 ◽  
Vol 495 (1) ◽  
pp. 1349-1359 ◽  
Author(s):  
L Yalyalieva ◽  
G Carraro ◽  
R Vazquez ◽  
L Rizzo ◽  
E Glushkova ◽  
...  
Keyword(s):  
Open Cluster ◽  
Three Dimensional ◽  
Star Formation History ◽  
Optical Data ◽  
Dimensional Structure ◽  
Fundamental Parameters ◽  
Time Estimates ◽  
Young Open Cluster ◽  
Pms Stars ◽  
Gaia Dr2

ABSTRACT We present and discuss photometric optical data in the area of the OB association Sco OB1 covering about 1 deg2. UBVI photometry is employed in tandem with Gaia DR2 data to investigate the three-dimensional structure and the star formation history of the region. By combining parallaxes and proper motions, we identify seven physical groups located between the young open cluster NGC 6231 and the bright nebula IC 4628. The most prominent group coincides with the sparse open cluster Trumpler 24. We confirm the presence of the intermediate-age star cluster VdB-Hagen 202, which is unexpected in this environment, and provide for the first time estimates of its fundamental parameters. After assessing individual groups membership, we derive mean proper motion components, distances, and ages. The seven groups belong to two different families. To the younger family (family I) belong several pre-main-sequence (PMS) stars as well. These are evenly spread across the field, and also in front of VdB-Hagen 202. VdB-Hagen 202, and two smaller, slightly detached, groups of similar properties form family II, which do not belong to the association, but are caught in the act of passing through it. As for the younger population, this forms an arc-like structure from the bright nebula IC 4628 down to NGC 6231, as previously found. Moreover, the PMS stars density seems to increase from NGC 6231 northward to Trumpler 24.

scholarly journals Investigating star formation in the young open cluster NGC 6383

2006 ◽  
Vol 462 (1) ◽  
pp. 157-162 ◽  
Author(s):  
E. Paunzen ◽  
M. Netopil ◽  
K. Zwintz
Keyword(s):  
Star Formation ◽  
Open Cluster ◽  
Young Open Cluster

scholarly journals NGC 3293 revisited by the Gaia-ESO Survey

2014 ◽  
Vol 9 (S307) ◽  
pp. 140-141
Author(s):  
Thierry Semaan ◽  
Thierry Morel ◽  
Eric Gosset ◽  
Juan Zorec ◽  
Yves Frémat ◽  
...  
Keyword(s):  
Massive Stars ◽  
Open Cluster ◽  
Second Step ◽  
Chemical Abundances ◽  
Hot Stars ◽  
Fundamental Parameters ◽  
Medium Resolution ◽  
Young Open Cluster ◽  
Extended View

AbstractIn the framework of the Gaia-ESO survey we have determined the fundamental parameters of a large number of B-type stars in the Galactic, young open cluster NGC 3293. The determination of the stellar parameters is based on medium-resolution spectra obtained with FLAMES/GIRAFFE at ESO-VLT. As a second step, we adopted the accurate parameters to determine the chemical abundances of these hot stars. We present a comparison of our results with those obtained by the 'VLT-FLAMES survey of massive stars' (Evans et al. 2005). Our study increases the number of objects analysed and provides an extended view of this cluster.

scholarly journals Triggered massive star formation in the open cluster NGC 1893

2003 ◽  
Vol 212 ◽  
pp. 562-563
Author(s):  
Amparo Marco ◽  
Ignacio Negueruela
Keyword(s):  
Star Formation ◽  
Emission Line ◽  
Massive Star ◽  
Main Sequence ◽  
Open Cluster ◽  
Star Forming ◽  
Young Open Cluster ◽  
H Ii Region ◽  
Pms Stars ◽  
Bright Emission

We have carried out a search for emission line pre-main sequence (PMS) stars in the area of the star-forming young open cluster NGC 1893 by means of slitless spectroscopy. We find 19 emission line stars with spectral types spanning the range from early B-type to G-type. All the PMS stars are confined to two small regions: the outer rim of the molecular cloud associated with the H ii region IC 410 and the vicinity of the bright emission cometary nebulae Sim 129 and Sim 130. The overall spatial distribution of PMS stars strongly suggests, that present day star formation in NGC 1893 is triggered by the O-type stars in the cluster.

scholarly journals Stellar contents and star formation in the young open cluster Stock 8

2008 ◽  
Vol 384 (4) ◽  
pp. 1675-1700 ◽  
Author(s):  
Jessy Jose ◽  
A. K. Pandey ◽  
D. K. Ojha ◽  
K. Ogura ◽  
W. P. Chen ◽  
...  
Keyword(s):  
Star Formation ◽  
Open Cluster ◽  
Young Open Cluster

scholarly journals A multiwavelength study of star formation in the very young open cluster NGC 6530

1997 ◽  
Vol 123 (1) ◽  
pp. 63-82 ◽  
Author(s):  
M. E. van den Ancker ◽  
P. S. Thé ◽  
A. Feinstein ◽  
R. A. Vázquez ◽  
D. de Winter ◽  
...  
Keyword(s):  
Star Formation ◽  
Open Cluster ◽  
Young Open Cluster

scholarly journals IC 4665 DANCe

2019 ◽  
Vol 631 ◽  
pp. A57 ◽  
Author(s):  
N. Miret-Roig ◽  
H. Bouy ◽  
J. Olivares ◽  
L. M. Sarro ◽  
M. Tamura ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Open Cluster ◽  
Mass Function ◽  
Contamination Rate ◽  
Magnitude Distribution ◽  
Star Forming ◽  
Fundamental Parameters ◽  
Star Forming Regions ◽  
Magnitude Range ◽  
Young Open Cluster

Context. The study of star formation is extremely challenging, due to the lack of complete and clean samples of young nearby clusters and star-forming regions. The recent Gaia DR2 catalogue complemented with the deep ground-based COSMIC DANCe catalogue offers a new database of unprecedented accuracy to revisit the membership of clusters and star-forming regions. The 30 Myr open cluster IC 4665 is one of the few well-known clusters of this age and it is an excellent target where evolutionary models can be tested and planetary formation studied. Aims. We provide a comprehensive membership analysis of IC 4665 and study the following properties: empirical isochrones, distance, magnitude distribution, present-day system mass function, and spatial distribution. Methods. We used the Gaia DR2 catalogue together with the DANCe catalogue to look for members via a probabilistic model of the distribution of the observable quantities in both the cluster and background populations. Results. We obtained a final list of 819 candidate members that cover a 12.4 magnitude range (7 <  J <  19.4). We find that 50% are new candidates, and we estimate a conservative contamination rate of 20%. This unique sample of members allows us to obtain a present-day system mass function in the range of 0.02–6 M⊙, which reveals a number of details not seen in previous studies. In addition, we find that a spherically symmetric spatial distribution is favoured by our final list of members for this young open cluster. Conclusions. Our membership analysis represents a significant increase in the quantity and quality (low contamination) with respect to previous studies. It offers an excellent opportunity to revisit other fundamental parameters such as age.

scholarly journals The history of star formation in the Galactic young open cluster NGC 6231

2006 ◽  
Vol 2 (S237) ◽  
pp. 485-485
Author(s):  
Mario E. van den Ancker
Keyword(s):  
Star Formation ◽  
Open Cluster ◽  
Mass Function ◽  
Star Formation History ◽  
Wide Field ◽  
Star Formation Activity ◽  
Formation History ◽  
Young Open Cluster ◽  
History Of ◽  
Low Mass

AbstractWe study the star formation history of the galactic young open cluster NGC 6231 using new, deep, wide-field BVRI imaging. Contrary to previous suggestions, we do not find a lack of low-mass cluster members; our derived mass function is compatible with a Salpeter IMF. The star formation history of NGC 6231 appears to be bi-modal, with a first wave of star formation activity 3–5 Myr ago, followed by a new generation of stars forming ~ 1 Myr ago.

Sign in / Sign up

Export Citation Format

Share Document