New catalogue of optically visible open clusters and candidates

Dias, W. S.; Alessi, B. S.; Moitinho, A.; Lépine, J. R. D.

doi:10.1051/0004-6361:20020668

Cited by 931 publications

(1,354 citation statements)

References 14 publications

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“…This inspection revealed two objects resembling open clusters which are not listed in any optical open cluster catalogue, e.g. Alter et al (1970), Lyngå (1987), and more recently Dias et al (2002). The two objects are projected close to each other (≈6 ) suggesting a physical pair.…”

Section: New Open Clusters In Cyg Ob2?mentioning

confidence: 98%

Does Cyg OB2 harbour any open cluster?

Bica

Bonatto

Dutra

2003

A&A

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Abstract.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 Cyg OB2. These two objects have been found during an optical inspection of that region with Digitized Sky Survey images. Using 2MASS photometry we determined their fundamental parameters. We assumed an age of 1-4 Myr and obtained a distance from the Sun d = 1.8 ± 0.2 kpc for both objects. Reddening values for Objects 1 and 2 are E(B− V) = 2.12± 0.06 and E(B− V) = 1.82± 0.06, respectively. A normal luminosity function is observed down to A0 stars, similar to that of NGC 6910. The two open cluster candidates may form a physical pair in Cyg OB2, similar to Tr 14/Tr 16 in Car OB1. Subsequently, we carried out a systematic search with 2MASS in a region 3 • × 3 • encompassing Cyg OB2. A third uncatalogued object resulted from this search which is projected just outside Cyg OB2.

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Section: New Open Clusters In Cyg Ob2?mentioning

confidence: 98%

Does Cyg OB2 harbour any open cluster?

Bica

Bonatto

Dutra

2003

A&A

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“…Red giant members of OCs, with the exception of NGC 2682 (M67), not yet subjected to a comprehensive abundance analysis using high resolution spectroscopy were selected from the New catalogue of optically visible open clusters and candidates 1 (Dias et al 2002). Selection of red giants instead of main sequence stars enables the extension of our observations to more distant OCs.…”

Section: Observations and Data Reductionmentioning

confidence: 99%

Comprehensive abundance analysis of red giants in the open clusters NGC 1342, 1662, 1912, 2354 and 2447

Reddy

Giridhar

Lambert

2015

Monthly Notices of the Royal Astronomical Society

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We have analyzed high-resolution echelle spectra of red giant members for seven open clusters in the Galactic anticentre direction to explore their chemical compositions. Cluster membership has been confirmed by radial velocity. The spread in temperatures and gravities being very small among the red giants, nearly the same stellar lines were employed for all stars thereby reducing the abundance errors: the errors of the average abundance for a cluster were generally in the 0.02 to 0.05 dex range. Our present sample covers Galactocentric distances of 8.3 to 11.3 kpc and an age range of 0.2 to 4.3 Gyr. A careful comparison of our results for the cluster NGC 2682 (M 67) to other high-resolution abundance studies in the literature shows general good agreement for almost all elements in common.

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“…We have compiled an updated OC catalog (Chen et al, in prep. ), for which data have been extracted from various sourcesmainly from (Dias et al 2002), (Kharchenko et al (2005a), Kharchenko et al (2005b)), and the WEBDA database (Mermilliod & Paunzen 2003). Based on this large sample, we can embark on statistical studies of the Galactic OC system.…”

Section: The Open Cluster System and The Observational Databasementioning

confidence: 99%

Open clusters: their kinematics and metallicities

et al. 2007

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Abstract. We review our work on Galactic open clusters in recent years, and introduce our proposed large program for the LOCS (LAMOST Open Cluster Survey). First, based on the most complete open clusters sample with metallicity, age and distance data as well as kinematic information, some preliminary statistical analysis regarding the spatial and metallicity distributions is presented. In particular, a radial abundance gradient of −0.058± 0.006 dex kpc −1 is derived. By dividing clusters into the age groups we show that the disk abundance gradient was steeper in the past. Secondly, proper motions, membership probabilities, and velocity dis- The open cluster system and the observational databaseOpen clusters (OCs) are considered excellent laboratories for studies of stellar evolution. Studies in the research area dealing with OCs show a rapid growth in 1990's and this area continues to develop vigorously. There may be several reasons for this recent growth of OC studies. New techniques are greatly beneficial to the OC observations, including, for example, the application of wide-field, high quality CCD cameras and, more recently, multi-object spectrographs. In addition, OC studies play a very important and unique role in determining the structure and evolution of the Galactic disk.OCs have long been used to trace the structure and evolution of the Galactic disk. From the observational point of view, there are some important advantages of using OCs as opposed to field stars. In OCs, we deal with groups of stars of nearly the same age, a similar composition and at a similar distance. We can observe OCs to large distances, and the photometric distances to most of the OC sample have already been derived. In particular, OCs have a relatively stable orbital motion, which can be used as a better tracer of the Galactic disk structure. OCs also have a wide range of ages, so that -combined with their spatial distribution and kinematic information -we can study the effects of dynamical evolution. Very young OCs are ideal objects for studies of the stellar initial mass function. Furthermore, when combined with abundance data, we can 433 at https://www.cambridge.org/core/terms. https://doi

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New catalogue of optically visible open clusters and candidates

Cited by 931 publications

References 14 publications

Does Cyg OB2 harbour any open cluster?

Does Cyg OB2 harbour any open cluster?

Comprehensive abundance analysis of red giants in the open clusters NGC 1342, 1662, 1912, 2354 and 2447

Open clusters: their kinematics and metallicities

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