J/A+A/453/517 JKs photometry of N159A (Testor+, 2006)
VLT/NACO near-infrared imaging and spectroscopy of N159A in
the LMC HII complex N159.
Testor G., Lemaire J.L., Field D., Diana S.
<Astron. Astrophys. 453, 517 (2006)>
=2006A&A...453..517T 2006A&A...453..517T
ADC_Keywords: Magellanic Clouds ; H II regions ; Photometry, infrared
Keywords: galaxies: Large Magellanic Cloud -- ISM: individual objects: N159A -
stars: formation - stars: individual: pre-main sequence
Abstract:
We present near-infrared imaging and spectroscopic observations of the
HII region N159A (∼10pc) in the giant star-forming region N159 (50pc)
in the LMC. N159A was observed in the J and Ks bands at high spatial
resolution ∼0.2" using the ESO Very Large Telescope UT4 (VLT),
equipped with the NAOS adaptative optics system. Our data reveal the
morphology of this region in unprecedented detail. The protostar P2,
one of the first YSOs of Class I identified in the LMC is now resolved
in two YSO candidates. The ultracompact HII region LI-LMC 1501W is
found to be a tight cluster embedded in a compact HII region ionised
by a late O source. A new multiple system composed of a tight star
cluster and an YSO candidate, all embedded in compact nebular region
(0.4pc) is also detected at the north-east edge of N159A. The stellar
population of the whole N159A region appears composed of two main
stellar populations, one with an age <3Myr and the other one with a
large range of age (300Myr-10Gyr). Using spectroscopy, one of the two
exciting O stars in the HII region N159A is classified O5-O6.
Description:
This table displays the results of a DAOPHOT/NSTAR photometry run on
VLT/NACO JK images from the LMC N159A region. Sequential number refers
to the chart in the paper.
Objects:
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RA (2000) DE Designation(s)
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05 39 55.0 -69 45 00 LHA 120-N 159A = NGC 2079
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 92 136 DAOPHOT/NSTAR photometry on VLT/NACO JKs images
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential number
5 I1 h RAh Right ascension (J2000)
7- 8 I2 min RAm Right ascension (J2000)
10- 14 F5.2 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- 27 F5.2 arcsec DEs Declination (J2000)
30- 35 F6.2 pix Xpos X position
37- 42 F6.2 pix Ypos Y position
44- 48 F5.2 mag Jmag J magnitude
50- 53 F4.2 mag e_Jmag rms uncertainty on Jmag
55- 59 F5.2 mag Ksmag Ks magnitude
61- 64 F4.2 mag e_Ksmag rms uncertainty on Ksmag
66- 69 F4.2 mag J-Ks J-Ks colour index
71- 73 I3 ---- [DCL92] ? Deharveng et al. (1992A&A...259..480D 1992A&A...259..480D) number
75- 79 F5.2 mag Vmag ? V magnitude from DCL92
81- 84 F4.2 mag B-V ? B-V colour index from DCL92
86- 92 A7 --- SpType MK spectral type from DCL92
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Acknowledgements: Gerard Testor, testor(at)mesiog.obspm.fr
(End) Patricia Vannier [CDS] 22-Jun-2006