J/A+A/550/A83 NIR observations of CG1 and CG2 (Makela+, 2013)
Star formation, structure and formation mechanism of cometary globules:
NIR observations of CG 1 and CG 2.
Makela M.M., Haikala L.K.
<Astron. Astrophys. 550, A83 (2013)>
=2013A&A...550A..83M 2013A&A...550A..83M
ADC_Keywords: Globules ; Stars, pre-main sequence ; Photometry, infrared
Keywords: stars: formation - stars: pre-main-sequence -
ISM: individual: CG1 -ISM: individual: CG2 - ISM: dust, extinction
Abstract:
Cometary globules CG1 and CG2 are "classical" cometary globules in the
Gum Nebula region at a distance of ∼300pc.
The objective of this study is to examine the mass distribution and
the structure of CG1 and CG2 through extinction, and to study the star
formation activity in CG1 and CG2.
The NIR JHKs photometry is used in creating visual extinction maps.
Description:
The JHKs photometry of stars in a 5'x15' region in CG1 and 5'x5'
region in CG2 is presented. The observations were carried out with the
SOFI instrument on NTT. Also a reddening-free reference region, OFF,
(5'x5') has been observed.
The magnitudes have been converted to the 2MASS system and the
positional accuracy is better than 0.6". The smallest errors have been
rounded up to 0.01mag.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 101 674 Stellar JHKs photometry in CG1 region
table2.dat 108 201 Stellar JHKs photometry in CG2 region
table3.dat 98 230 Stellar JHKs photometry in OFF (reference region)
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See also:
J/A+A/510/A1 : Near infrared imaging of cometary globule CG12 (Haikala+, 2010)
Byte-by-byte Description of file: table1.dat table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential star number, within the field
5- 23 A19 --- Name Stellar identification, JHHMMSS.ss+DDMMSS.s
25- 26 I2 h RAh Right ascension (J2000)
28- 29 I2 min RAm Right ascension (J2000)
31- 35 F5.2 s RAs Right ascension (J2000)
37 A1 --- DE- Declination sign
38- 39 I2 deg DEd Declination (J2000)
41- 42 I2 arcmin DEm Declination (J2000)
44- 47 F4.1 arcsec DEs Declination (J2000)
49- 53 F5.2 mag Jmag SOFI J magnitude
55- 58 F4.2 mag e_Jmag Formal error on Jmag
60- 64 F5.2 mag Hmag SOFI H magnitude
66- 69 F4.2 mag e_Hmag Formal error on Hmag
71- 75 F5.2 mag Ksmag SOFI Ks magnitude
77- 80 F4.2 mag e_Ksmag Formal error on Ksmag
82- 86 F5.2 mag J-H J-H colour index
88- 92 F5.2 mag H-K H-K colour index
94-108 A15 --- Comment Comments about identifications (1)
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Note (1): Comments as follows:
2MASS = identification in the 2MASS catalog
CG1 IRS2 = the IRS candidate identification
CG2 IRS1 = the IRS candidate identification
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Acknowledgements:
Minja M. Makela, minja.makela(at)helsinki.fi
(End) Minja Makela [Univ. of Helsinki], Patricia Vannier [CDS] 19-Nov-2012