J/A+A/532/A131 New Galactic star clusters in VVV survey (Borissova+, 2011)
New Galactic star clusters discovered in the VVV survey.
Borissova J., Bonatto C., Kurtev R., Clarke J.R.A., Penaloza F.,
Sale S.E., Minniti D., Alonso-Garcia J., Artigau E., Barbda R., Bica E.,
Baume G.L., Catelan M., Chene A.-N., Dias B., Folkes S.L., Froebrich D.,
Geisler D., de Grijs R., Hanson M.M., Hempel M., Ivanov V.D., Kumar M.S.N.,
Lucas P., Mauro F., Moni Bidin C., Rejkuba M., Saito R.K., Tamura M.,
Toledo I.
<Astron. Astrophys. 532, A131 (2011)>
=2011A&A...532A.131B 2011A&A...532A.131B
ADC_Keywords: Clusters, open ; Stars, OB ; Photometry, infrared
Keywords: open clusters and associations: general - stars: early-type -
infrared: general
Abstract:
VISTA Variables in the Via Lactea (VVV) is one of the six ESO Public
Surveys operating on the new 4-meter Visible and Infrared Survey
Telescope for Astronomy (VISTA). VVV is scanning the Milky Way bulge
and an adjacent section of the disk, where star formation activity is
high. One of the principal goals of the VVV Survey is to find new star
clusters of different ages.
In order to trace the early epochs of star cluster formation we
concentrated our search in the directions to those of known star
formation regions, masers, radio, and infrared sources.
The disk area covered by VVV was visually inspected using the pipeline
processed and calibrated KS-band tile images for stellar
overdensities. Subsequently, we examined the composite JHKS and ZJKS
color images of each candidate. PSF photometry of 15x15arcmin fields
centered on the candidates was then performed on the Cambridge
Astronomy Survey Unit reduced images. After statistical field-star
decontamination, color-magnitude and color-color diagrams were
constructed and analyzed.
Description:
We carried out a VVV J, H and Ks survey of infrared star clusters in
the Milky Way southern disk area. We concentrated efforts on embedded
clusters, which are those expected in the areas of known star
formation regions, masers, radio, and infrared sources. The present
study provides 96 new infrared clusters and stellar groups.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 168 96 New Galactic star clusters discovered in the
VVV Survey
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [VVV CL]
7- 9 I03 --- VVV-CL Object name (VVV CLNNN)
11- 12 I2 h RAh Right ascension (J2000)
14- 15 I2 min RAm Right ascension (J2000)
17- 18 I2 s RAs Right ascension (J2000)
20 A1 --- DE- Declination sign (J2000)
21- 22 I2 deg DEd Declination (J2000)
24- 25 I2 arcmin DEm Declination (J2000)
27- 28 I2 arcsec DEs Declination (J2000)
30- 31 I2 --- N ? Number of most probable cluster members
33- 34 I2 arcsec R Apparent cluster radius
36- 39 A4 --- Tile VVV tile name
41-168 A128 --- Com Comments
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Acknowledgements:
Jura Borissova,
(End) Patricia Vannier [CDS] 23-Jun-2011