New infrared star clusters in the southern Milky Way with 2MASS

Dutra, Carlos Maximiliano; Bica, E.; Soares, Jules Batista; Barbuy, B.

doi:10.1051/0004-6361:20030005

Cited by 187 publications

(256 citation statements)

References 35 publications

(56 reference statements)

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“…With the advent of 2MASS (Cutri et al 2003), systematic searches for embedded star clusters became possible. A similar search to the one performed in the optical, but now over the infrared cluster catalogues of Bica et al (2003) and Dutra et al (2003), only reveals two more pairs. Another exercise than can be done is to search over the merged list of optically revealed and hidden clusters.…”

Section: Cluster Samplementioning

confidence: 76%

Open clusters in the Third Galactic Quadrant III. Alleged binary clusters

Vazquez

Moitinho

Carraro³

et al. 2010

A&A

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Aims. We aim to determine accurate distances and ages of eight open clusters in order to: (1) assess their possible binarity (2) provide probes to trace the structure of the Third Galactic Quadrant. Methods. Cluster reddenings, distances, ages and metallicities are derived from ZAMS and isochrone fits in UBVRI photometric diagrams. Field contamination is reduced by restricting analysis to stars within the cluster limits derived from star counts. Further membership control is done by requiring that stars have consistent positions in several diagrams and by using published spectral types. Results. The derived distances, ages and metallicities have shown that none of the analysed clusters compose binary/double systems. Of the four candidate pairs, only NGC 2383/NGC 2384 are close to each other, but have different metallicities and ages. Ruprecht 72 and Ruprecht 158 are not clusters but fluctuations of the field stellar density. Haffner 18 is found to be the superposition of two stellar groups at different distances: Haffner 18(1) at 4.5 kpc and Haffner 18(2) between 9.5 and 11.4 kpc from the Sun. The derived distances and ages have been used to situate the clusters in the Galactic context. In particular, young stellar groups trace spiral structure at large Galactocentric radii. At least two clusters formed during the last few 10 8 yr in an interstellar medium with less than solar abundances. Conclusions. In contrast with the LMC, double clusters are apparently rare, or even non existent, in the undisturbed environment of the Third Galactic Quadrant. This leaves open the question of whether binary clusters form more easily toward denser and more violent regions of the Milky Way such as the inner Galaxy.

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Section: Cluster Samplementioning

confidence: 76%

Open clusters in the Third Galactic Quadrant III. Alleged binary clusters

Vazquez

Moitinho

Carraro³

et al. 2010

A&A

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“…However, it is likely that we uncovered the most populous objects. In the recent compilation of stellar clusters, updated to August 2011 of all Galactic star cluster catalogs (e.g., Dias et al 2002;Mercer el at 2005;Dutra et al 2003;Bica et al 2003;Borissova et al 2011), Morales et al (2013) counted 2247 clusters visible in the optical and 1950 and 197 cluster candidates found in the near-and mid-infrared, respectively. Since then, Solin et al (2012Solin et al ( , 2014, Majaess (2013), and Zasowski et al (2013) reported 137; 88; 229 and 20 new embedded cluster candidates in the UKIDSS GPS, VVV, WISE, and Spitzer GLIMPSE-360 areas.…”

Section: Cluster Search and Methods Of Analysismentioning

confidence: 99%

New galactic star clusters discovered in the VVV survey. Candidates projected on the inner disk and bulge

Borissova

Chené

Alegría

et al. 2014

A&A

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Context. VISTA Variables in the Vía Láctea (VVV) is one of six ESO Public Surveys using the 4 meter Visible and Infrared Survey Telescope for Astronomy (VISTA). The VVV survey covers the Milky Way bulge and an adjacent section of the disk, and one of the principal objectives is to search for new star clusters within previously unreachable obscured parts of the Galaxy. Aims. The primary motivation behind this work is to discover and analyze obscured star clusters in the direction of the inner Galactic disk and bulge. Methods. Regions of the inner disk and bulge covered by the VVV survey were visually inspected using composite JHK S color images to select new cluster candidates on the basis of apparent overdensities. DR1, DR2, CASU, and point spread function photometry of 10 × 10 arcmin fields centered on each candidate cluster were used to construct color-magnitude and color-color diagrams. Follow-up spectroscopy of the brightest members of several cluster candidates was obtained in order to clarify their nature. Results. We report the discovery of 58 new infrared cluster candidates. Fundamental parameters such as age, distance, and metallicity were determined for 20 of the most populous clusters.

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“…Besides serendipitous discoveries and findings in specific directions such as those of molecular clouds (Hodapp 1994) or nebulae (Dutra et al 2003a, hereafter Paper I), systematic methods can be applied: visual inspections of a whole area (Dutra & Bica 2000a) or automated methods (Reylé & Robin 2002;Ivanov et al 2002).…”

Section: Introductionmentioning

confidence: 99%

“…The search in this zone complements that in the Southern Milky Way (Dutra et al 2003a). The method concentrates efforts on the directions of known optical and radio nebulae.…”

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confidence: 99%

New infrared star clusters in the Northern and Equatorial Milky Way with 2MASS

Bica

Dutra

Soares

et al. 2003

A&A

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Abstract. We carried out a survey of infrared star clusters and stellar groups on the 2MASS J, H and K s all-sky release Atlas in the Northern and Equatorial Milky Way (350The search in this zone complements that in the Southern Milky Way (Dutra et al. 2003a). The method concentrates efforts on the directions of known optical and radio nebulae. The present study provides 167 new infrared clusters, stellar groups and candidates. Combining the two studies for the whole Milky Way, 346 infrared clusters, stellar groups and candidates were discovered, whereas 315 objects were previously known. They constitute an important new sample for future detailed studies.

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New infrared star clusters in the southern Milky Way with 2MASS

Cited by 187 publications

References 35 publications

Open clusters in the Third Galactic Quadrant III. Alleged binary clusters

Open clusters in the Third Galactic Quadrant III. Alleged binary clusters

New galactic star clusters discovered in the VVV survey. Candidates projected on the inner disk and bulge

New infrared star clusters in the Northern and Equatorial Milky Way with 2MASS

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