J/A+A/469/459 K magnitudes of N159-5 (LMC) (Testor+, 2007)
VLT/NACO near-infrared imaging and spectroscopy of N159-5 in the LMC HII
complex N159.
Testor G., Lemaire J.L., Kristensen L.E., Field D., Diana S.
<Astron. Astrophys., 469, 459-469 (2007)>
=2007A&A...469..459T 2007A&A...469..459T
ADC_Keywords: Magellanic Clouds ; H II regions ; Photometry, infrared
Keywords: galaxies: Magellanic Clouds - ISM: individual objects: N159-5 -
stars: formation
Abstract:
We present high-resolution near-infrared imaging of the compact HII
region N159-5 and its immediate environment in the giant-star forming
region N159 in the LMC. N159-5 was observed at high spatial resolution
∼0.11"-0.25" in the K-band using the ESO Very Large Telescope UT4
(VLT), equipped with the NAOS adaptive optics system. Our data reveal
that N159-5 has a complex morphology formed mainly by two wings and
probably a single central bright star, embedded in diffuse emission of
∼4.5" diameter. A remarkable embedded tight cluster of approximatively
the same size, containing at least 38 faint stars coinciding with
N159-5, is also detected. Such clusters can be found in galactic HII
regions like the star-forming regions SH2 269 or M42. At the location
of the radio peak, especially in the bright western wing, this cluster
is rich in stars. Spectroscopic observations reveal that the diffuse
region is constituted mainly of dust continuum and that the bright
star #2-55 could be of type O8 V. A comparison with the radio
observation flux of N159-5 published in the literature seems to show
that the bright star #2-55 is not the only ionization source
of N159-5. Towards N159-5 molecular H2 emission is detected. A model
of the region is proposed.
Description:
NIR observations of N159-5 were obtained at the ESO-VLT during October
and December 2004. Images and spectra were obtained using NACO
composed of the Nasmyth Adaptative Optics System (NAOS) and the High
Resolution IR Camera and Spectrometer (CONICA).
The table dipslays the results of a DAOPHOT/NSTAR run on VLT/NACO
images of N159-5 in the LMC obtained with the S54 and S27 camera of
0.05273"/pix and 0.02637"/pix.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 71 207 K photometry of Field 1 outside Field 2 and Field 2
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See also:
J/A+A/453/517 : JKs photometry of N159A (Testor+, 2006)
J/A+A/422/129 : JHKs photometry in N159 (LMC) (Meynadier+, 2004)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1 A1 --- Field [ab] Field (a for Field 1 outside Field 2,
b for Field 2) (1)
3- 7 A5 --- [TLK2007] Identification number, 1-NNN or 2-NNN
8 A1 --- n_[TLK2007] [d] d: star embedded in a tight diffuse nebula
11 I1 h RAh Right ascension (J2000)
13- 14 I2 min RAm Right ascension (J2000)
16- 19 F4.2 s RAs Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22- 23 I2 deg DEd Declination (J2000)
25- 26 I2 arcmin DEm Declination (J2000)
28- 32 F5.2 arcsec DEs Declination (J2000)
34- 39 F6.2 pix Xpos X position
41- 46 F6.2 pix Ypos Y position
48- 52 F5.2 mag Kmag K magnitude
54- 58 F5.3 mag e_Kmag rms uncertainty on Kmag
60- 64 F5.1 --- [MHD2004] ? Identification number in Meynadier et al.,
Cat. J/A+A/422/129
65 A1 --- n_[MHD2004] [m] m for multiple star
67- 71 F5.2 mag Kmag2 ? K magnitude from Meynadier et al.,
Cat. J/A+A/422/129
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Note (1): The scales are:
a = observations with the S54 camera of 0.05273"/pix
b = observations with the S27 camera of 0.02637"/pix
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Acknowledgements:
Gerard Testor, testor(at)mesiog.obspm.fr
(End) Patricia Vannier [CDS] 30-Oct-2007