J/A+A/562/A115 VVV: star formation and embedded clusters (Solin+, 2014)
Mining the VVV: star formation and embedded clusters.
Solin O., Haikala L., Ukkonen E.
<Astron. Astrophys., 562, A115-115 (2014)>
=2014A&A...562A.115S 2014A&A...562A.115S
ADC_Keywords: Associations, stellar ; Infrared sources
Keywords: open clusters and associations: general - methods: statistical -
catalogs - surveys - infrared: stars
Abstract:
We aim to locate previously unknown stellar clusters using the VISTA
variables in the Via Lactea Survey (VVV) catalogue data. The method
fits a mixture model of Gaussian densities and background noise and
uses the expectation maximization algorithm to pre-filtered
near-infrared survey stellar catalogue data; it was developed by the
authors for the UKIDSS Galactic Plane Survey (GPS). The search located
88 previously unknown candidates, most of which are embedded stellar
cluster candidates, and 39 previously unknown sites of star formation
in the 562deg2 covered by VVV in the Galactic bulge and the southern
disk.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 108 88 List of cluster candidates
table2.dat 105 39 List of location of star formation candidates
that cannot be verified as clusters
table3.dat 106 26 List of faint nebulae with unknown nature
table5.dat 96 7 Sources that are not clusters, but are of
general interest
table4.dat 110 10 References
notes.dat 173 36 Individual notes
--------------------------------------------------------------------------------
See also:
J/A+A/542/A3 : Stellar clusters from UKIDSS Galactic Plane Survey (Solin+ 2012)
http://mwm.astro.puc.cl/mw/index.php/Main_Page : VVV Home Page
http://www.eso.org/sci/observing/phase3/data_releases/vvv_dr1.html : VVV DR1
Byte-by-byte Description of file: table1.dat table2.dat table3.dat table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Seq Sequential number, within the table
3 A1 --- n_Seq [*] * indicates a note in notes.dat file
5- 19 A15 --- Name Name (GLLL.lll+BB.bbb)
21- 27 F7.3 deg GLON Galactic longitude
29- 35 F7.3 deg GLAT Galactic latitude
37- 38 I2 h RAh Right ascension (J2000)
40- 41 I2 min RAm Right ascension (J2000)
43- 44 I2 s RAs Right ascension (J2000)
46 A1 --- DE- Declination sign (J2000)
47- 48 I2 deg DEd Declination (J2000)
50- 51 I2 arcmin DEm Declination (J2000)
53- 54 I2 arcsec DEs Declination (J2000)
56- 94 A39 --- Assoc Associated sources (1)
96-108 A13 --- Ref References, in table4.dat
--------------------------------------------------------------------------------
Note (1): Source classification from SIMBAD as follows:
IRDC = infrared dark cloud
of? = outflow candidate
bub = bubble
Mas = maser
(s)mm = (sub-)millimetre source
2MASX = 2MASS extended source (see Cat. VII/233)
RNe = reflection nebula
DNe = dark nebula
--------------------------------------------------------------------------------
Byte-by-byte Description of file: notes.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- --- [table]
6 I1 --- T Table number (1, 2, 3 or 5)
8- 9 I2 --- Seq Sequential number within the table
11-173 A163 --- Note Text of the note
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 42 A19 --- Aut Author's name
44-110 A67 --- Com Comments
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Saito et al., VVV DR1 2012A&A...537A.107S 2012A&A...537A.107S
Solin et al, Paper I 2012A&A...542A...3S 2012A&A...542A...3S, Cat. J/A+A/542/A3
(End) Patricia Vannier [CDS] 16-May-2014