J/A+A/436/117 BVR photometry in N214C (Meynadier+, 2005)
The LMC HII region N 214C and its peculiar nebular blob.
Meynadier F., Heydari-Malayeri M., Walborn N.R.
<Astron. Astrophys. 436, 117 (2005)>
=2005A&A...436..117M 2005A&A...436..117M
ADC_Keywords: Magellanic Clouds ; H II regions ; Photometry, UBVRI
Keywords: stars: early-type - galaxies: Magellanic Clouds -
interstellar medium: individual objects: LHA 120-N 214C
Abstract:
We study the Large Magellanic Cloud HII region N 214C using imaging
and spectroscopy obtained at the ESO New Technology Telescope. On the
basis of the highest resolution images so far obtained of the OB
association LH 110, we show that the main exciting source of the HII
region, Sk -71 51, is in fact a tight cluster of massive stars
consisting of at least 6 components in an area ∼4" wide.
Spectroscopic observations allow us to revise the spectral type of the
main component (#17) to O2V((f*))+OB, a very rare, hot type. We
also classify several other stars associated with N 214C and study the
extinction and excitation characteristics of the HII region. Moreover,
we obtain BVR photometry and astrometry of 2365 stars and from the
corresponding color-magnitude diagram study the stellar content of N
214C and the surrounding LH 110. Furthermore, we discover a striking
compact blob of ionized gas in the outer northern part of N 214C. A
spherical structure of ∼5", in radius (∼1.3pc), it is split into two
lobes by absorbing dust running diametrically through its center. We
discuss the possible nature of this object.
Description:
Table 2 displays the results of a DAOPHOT/ALLSTAR photometry run on
NTT/SuSI2 BVR images from the LMC N214 (LHA 120-N 214) region. DAOPHOT
internal errors were found to be much smaller than the worse
difference of magnitude over comparable plates, which was finally
chosen as the error indicator.
Table 3 displays the deconvolution results for the Sk-71 51 cluster,
using the latest implementation of the MCS deconvolution algorithm
(see text and P. Magain, F Courbin, S. Sohy, M. Gillon & G. Letawe,
2005, in prep).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 66 2327 Astrometry and BVR photometry of sources around
LMC N214
table3.dat 65 48 Astrometry and BVR photometry obtained after
deconvolution of the Sk-71 51 cluster
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Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq Identification number
6- 7 I2 h RAh Right ascension (J2000)
9- 10 I2 min RAm Right ascension (J2000)
12- 16 F5.2 s RAs Right ascension (J2000)
18 A1 --- DE- Declination sign
19- 20 I2 deg DEd Declination (J2000)
22- 23 I2 arcmin DEm Declination (J2000)
25- 28 F4.1 arcsec DEs Declination (J2000)
30- 34 F5.2 mag Vmag ? Bessel V magnitude (1)
36- 40 F5.2 mag B-V ? Bessel B-V color index (1)
42- 46 F5.2 mag V-R ? Bessel V-R color index (1)
49- 53 F5.3 mag e_Vmag ? Vmag error estimation (1)
55- 59 F5.3 mag e_B-V ? B-V error estimation (see text) (1)
61- 65 F5.3 mag e_V-R ? V-R error estimation (see text) (1)
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Note (1): In table3.dat, some photometry results are missing due to
insufficient S/N ratio.
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Acknowledgements: Frederic Meynadier, Frederic.Meynadier(at)obspm.fr
(End) F. Meynadier [LERMA - Obs. de Paris], Patricia Vannier [CDS] 05-Apr-2005