New Galactic star clusters discovered in the VVV survey

Borissova, J.; Bonatto, Charles Jose; Kurtev, R.; Clarke, J. R. A.; Peñaloza, Fernanda; Sale, S. E.; Minniti, D.; Alonso-García, J.; Artigau, Étienne; Barbá, R. H.; Bica, E.; Baume, G.; Catelan, M.; Chené, André-Nicolas; Dias, B.; Folkes, S. L.; Froebrich, D.; Geisler, Doug; Grijs, Richard de; Hanson, M. M.; Hempel, M.; Ivanov, V. D.; Kumar, M. S. N.; Lucas, P. W.; Mauro, F.; Bidin, C. Moni; Rejkuba, M.; Saito, R. K.; Tamura, Motohide; Toledo, I.

doi:10.1051/0004-6361/201116662

Cited by 108 publications

(173 citation statements)

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“…Robitaille et al (2008), Evans et al (2009), andGutermuth et al (2010) used Spitzer data to classify > 13 × 10 3 YSOs. Borissova et al (2011) discovered 96 candidate clusters 2 in the VVV survey (Minniti et al 2010), while Mercer et al (2005) identified 92 star clusters via GLIMPSE data (see also Froebrich et al 2007;Kronberger et al 2006). Those infrared surveys resolved numerous individual cluster stars, and in many instances confirmed existing evidence of star formation put forth by low-resolution surveys (e.g., IRAS and maser observations, Avedisova 2002).…”

Section: Introductionmentioning

confidence: 68%

Discovering protostars and their host clusters via WISE

Majaess¹

2012

Astrophys Space Sci

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A hybrid JHK s − W 1 W 2 W 3 W 4 high-spectral index (α) selection scheme was employed to identify (sub)clusters of class I/f candidate protostars (YSOs) in WISE observations (the Wide-Field Infrared Survey Explorer). n > 10 4 candidate YSOs were detected owing to WISE's advantageous all-sky spatial coverage, and a subsample (n ∼ 200) of their heavily-obscured host (sub)clusters were correlated with the Avedisova (2002) and Dias et al. (2002) catalogs of star-forming regions. Forthcoming observations from the VVV/UKIDSS surveys shall facilitate the detection of additional protostars and bolster efforts to delineate the Galactic plane, since the campaigns aim to secure deep JHK s photometry for a pertinent fraction of the WISE targets lacking 2MASS detections, and to provide improved data for YSOs near the limits of the 2MASS survey.

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Section: Introductionmentioning

confidence: 68%

Discovering protostars and their host clusters via WISE

Majaess¹

2012

Astrophys Space Sci

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“…Majaess (2013) has also made a significant contribution on young clusters (see also, Bica et al 2003a,b;Lada & Lada 2003;Mercer et al 2005;Froebrich, Scholz & Raftery 2007;Borissova et al 2011;Solin, Haikala & Ukkonen 2014).…”

Section: Introductionmentioning

confidence: 94%

Tracing the Galactic spiral structure with embedded clusters

Camargo

Bonatto

Bica

2015

Monthly Notices of the Royal Astronomical Society

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In the present work we investigate the properties of 18 embedded clusters (ECs). The sample includes 11 previously known clusters and we report the discovery of 7 ECs on WISE images, thus complementing our recent list of 437 new clusters. The main goal is to use such clusters to shed new light on the Galactic structure by tracing the spiral arms with cluster distances. Our results favour a four-armed spiral pattern tracing three arms, Sagitarius-Carina, Perseus, and the Outer arm. The SagitariusCarina spiral arm is probed in the borderline of the third and fourth quadrants at a distance from the Galactic centre of d 1 ∼ 6.4 kpc adopting R ⊙ = 7.2 kpc, or d 2 ∼ 7.2 kpc for R ⊙ = 8.0 kpc. Most ECs in our sample are located in the Perseus arm that is traced in the second and third quadrants and appear to be at Galactocentric distances in the range d 1 = 9 − 10.5 kpc or d 2 = 9.8 − 11.3 kpc. Dolidze 25, Bochum 2, and Camargo 445 are located in the Outer arm that extends along the second and third Galactic quadrants with a distance from the Galactic centre in the range of d 1 = 12.5 − 14.5 kpc or d 2 = 13.5 − 15.5 kpc. We find further evidence that in the Galaxy ECs are predominantly located within the thin disc and along spiral arms. They are excellent tools for tracing these Galactic features and therefore new searches for ECs can contribute to a better understanding of the Galactic structure. We also report an EC aggregate located in the Perseus arm.

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“…The effort aims to build upon existing catalogs that are complete within only 1 kpc from the Sun (version 3.3 -jan./10/2013 of the Dias et al 2002 catalog; see also Lamers et al 2005;Piskunov et al 2008). In Borissova et al (2011), we presented a catalog of 96 new cluster candidates in the disk area covered by the VVV survey. Most of these clusters were found toward known star forming regions associated with methanol maser emission, hot molecular cores (Longmore et al 2009), Galactic bubbles detected by GLIMPSE (Churchwell et al 2006(Churchwell et al , 2007, and infrared and radio sources.…”

Section: Introductionmentioning

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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New Galactic star clusters discovered in the VVV survey

Cited by 108 publications

References 44 publications

Discovering protostars and their host clusters via WISE

Discovering protostars and their host clusters via WISE

Tracing the Galactic spiral structure with embedded clusters

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

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