J/A+A/538/A142 OB stars in NGC 6334 and NGC 6357 (Russeil+, 2012)
Statistical study of OB stars in NGC 6334 and NGC 6357.
Russeil D., Zavagno A., Adami C., Anderson L.D., Bontemps S., Motte F.,
Rodon J.A., Schneider N., Ilmane A., Murphy K.J.
<Astron. Astrophys. 538, A142 (2012)>
=2012A&A...538A.142R 2012A&A...538A.142R
ADC_Keywords: Stars, early-type ; Stars, OB ; Photometry, UBVRI
Keywords: HII regions - dust, extinction
Abstract:
Star-forming complexes are large structures exhibiting massive
star-formation at different stages of evolution, from dense cores to
well-developed HII regions. They are very interesting for the study
of the formation and evolution of stars. NGC 6334 and NGC 6357 are two
active and relatively nearby star-forming complexes. From the
extinction map and the sub-mm cold dust emission, and because they
have similar velocities, these regions are most likely connected.
However, located in the direction of the Galactic center their radial
velocity is not representative of their distance. An alternative is
then to determine the distance of NGC 6334 and NGC 6357 from their
stellar content.
Our aim is to perform a census of O-B3 ionising stars in NGC 6334 and
NGC 6357, to determine the extinction coefficient, and the distance of
both regions. A census of O-B3 stars is an essential basis for
estimating the statistical lifetime of the earliest massive
star-forming phases.
Description:
We performed a U, B, V, and R photometric survey of a large area
covering NGC 6334 and NGC 6357 with the VIMOS (ESO-VLT) and the MOSAIC
(CTIO) instruments.
The tables present the magnitudes of stars in the field of NGC6334 and
NGC6357. The UBV data is from VIMOS (ESO-VLT) while R data is from
(Blanco-CTIO).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 99 30388 Stars with U, B, and V magnitudes
tablea2.dat 66 53415 Catalogue of stars: R magnitudes
--------------------------------------------------------------------------------
See also:
J/ApJS/69/99 : NGC 6334 centers of star formation JHK phot. (Straw+ 1989)
J/A+A/316/102 : JHK Photometry in NGC 6334 (Tapia+, 1996)
J/A+A/357/1020 : JHK photometry in NGC 6334 IV (Persi+, 2000)
J/ApJ/668/906 : Massive clumps in NGC 6334 (Munoz+, 2007)
J/ApJS/168/100 : X-ray study of star-forming region NGC 6357 (Wang+, 2007)
J/AJ/136/2083 : Clumps in NGC 6334 from 450/850um obs. (Matthews+, 2008)
J/A+A/515/A55 : NGC 6334-NGC 6357 complex (Russeil+, 2010)
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
3- 4 I2 h RAh Right ascension (J2000)
6- 7 I2 min RAm Right ascension (J2000)
9- 13 F5.2 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 28 F5.2 arcsec DEs Declination (J2000)
30- 36 F7.3 deg RAdeg Right ascension in decimal degrees (J2000)
38- 44 F7.3 deg DEdeg Declination in decimal degrees (J2000)
46- 52 F7.4 mag Vmag V magnitude
55- 61 F7.4 mag e_Vmag V magnitude uncertainty
65- 71 F7.4 mag Bmag B magnitude
74- 80 F7.4 mag e_Bmag B magnitude uncertainty
84- 90 F7.4 mag Umag U magnitude
93- 99 F7.4 mag e_Umag U magnitude uncertainty
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
3- 4 I2 h RAh Right ascension (J2000)
6- 7 I2 min RAm Right ascension (J2000)
9- 12 F4.1 s RAs Right ascension (J2000)
16 A1 --- DE- Declination sign (J2000)
17- 18 I2 deg DEd Declination (J2000)
20- 21 I2 arcmin DEm Declination (J2000)
23- 26 F4.1 arcsec DEs Declination (J2000)
30- 36 F7.3 deg RAdeg Right ascension in decimal degrees (J2000)
40- 47 F8.4 deg DEdeg Declination in decimal degrees (J2000)
51- 57 F7.4 mag Rmag R magnitude
61- 66 F6.4 mag e_Rmag R magnitude uncertainty
--------------------------------------------------------------------------------
Acknowledgements:
Delphine Russeil, delphine.russeil(at)oamp.fr
(End) Patricia Vannier [CDS] 27-Dec-2011