J/MNRAS/438/1848 NGC 7129 Vilnius photometry (Straizys+, 2014)
The distance to the young cluster NGC 7129 and its age.
Straizys V., Maskoliunas M., Boyle R.P., Prada Moroni P.G., Tognelli E.,
Zdanavicius K., Zdanavicius J., Laugalys V., Kazlauskas A.
<Mon. Not. R. Astron. Soc., 438, 1848-1855 (2014)>
=2014MNRAS.438.1848S 2014MNRAS.438.1848S
ADC_Keywords: Clusters, open ; Photometry, Vilnius
Keywords: stars: fundamental parameters - ISM: clouds - dust, extinction -
ISM: individual objects: TGU H645 P2 -
open clusters and associations: individual: NGC 7129 -
Abstract:
The dust cloud TGU H645 P2 and embedded in it the young open cluster
NGC 7129 are investigated using the results of medium-band photometry
of 159 stars in the Vilnius seven-colour system down to V=18.8mag. The
photometric data were used to classify about 50 per cent of the
measured stars in spectral and luminosity classes. The extinction AV
versus distance diagram for the 20'x20' area is plotted for 155 stars
with two-dimensional classification from the present and the previous
catalogues. The extinction values are found in the range between 0.6
and 3.4mag. However, some red giants, located in the direction of the
dense parts of the cloud, exhibit the infrared extinction equivalent
up to AV=13mag. The distance to the cloud (and the cluster) is found
to be 1.15kpc (the true distance modulus 10.30mag). For determining
the age of NGC 7129, a luminosity versus temperature diagram for six
cluster members of spectral classes B3-A1 was compared with the Pisa
pre-main-sequence evolution tracks and the Palla birthlines. The
cluster can be as old as about 3Myr, but star formation continues till
now as witnessed by the presence in the cloud of many younger
pre-main-sequence objects identified with photometry from 2MASS,
Spitzer and WISE infrared surveys.
Description:
The observations of two regions associated with IC 1848 were made on
2009 January 19 using the AZT-22 1.5-m telescope (f/7.74) at Maidanak
Astronomical Observatory in Uzbekistan. All imaging data were acquired
using the Fairchild 4098x4098 CCD (SNUCam) with
standard Bessell UBVI and Hα filters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 91 159 Results of photometry and classification of stars
in the NGC 7129 area
notes.dat 111 28 Individual notes
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See also:
J/A+A/507/227 : NGC 7129 pre-main sequence stars (Stelzer+, 2009)
J/BaltA/21/465 : Vilnius photometry in NGC7129 & NGC7142 (Maskoliunas+, 2012)
J/MNRAS/437/1628 : NGC 7142 Vilnius photometry (Straizys+, 2014)
J/A+A/568/A65 : NGC 7129 FIRS 2 interferometric 1-D spectrum (Fuente+, 2014)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/159] Sequential number
4 A1 --- n_Seq [*] * indicates a note in notes.dat file
6- 7 I2 h RAh Right ascension (J2000) (1)
9- 10 I2 min RAm Right ascension (J2000) (1)
12- 16 F5.2 s RAs Right ascension (J2000) (1)
18 A1 --- DE- Declination sign (J2000) (1)
19- 20 I2 deg DEd Declination (J2000) (1)
22- 23 I2 arcmin DEm Declination (J2000) (1)
25- 28 F4.1 arcsec DEs Declination (J2000) (1)
30- 35 F6.3 mag Vmag Vilnius V magnitude
37- 41 F5.3 mag U-V ? Vilnius U-V colour index
42 A1 --- u_U-V Uncertainty flag on U-V
44- 48 F5.3 mag P-V ? Vilnius P-V colour index
49 A1 --- u_P-V Uncertainty flag on P-V
51- 55 F5.3 mag X-V ? Vilnius X-V colour index
56 A1 --- u_X-V Uncertainty flag on X-V
58- 62 F5.3 mag Y-V ? Vilnius Y-V colour index
64- 68 F5.3 mag Z-V ? Vilnius Z-V colour index
69 A1 --- u_Z-V Uncertainty flag on Z-V
71- 75 F5.3 mag V-S ? Vilnius V-S colour index
76 A1 --- u_V-S Uncertainty flag on V-S
78- 88 A11 --- SpT Photometric MK spectral type
90- 91 A2 --- Bin Binary or multiple star (**)
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Note (1): The coordinates are from the PPMXL (Cat. I/317) catalogue.
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential number
5-111 A107 --- Note Text of the note (1)
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Note (1): References in brackets are:
1 = Magakian et al. (2004Ap.....47..519M 2004Ap.....47..519M)
2 = Gutermuth et al. (2004ApJS..154..374G 2004ApJS..154..374G; 2009, J/ApJS/184/18)
3 = Stelzer & Scholz (2009A&A...507..227S 2009A&A...507..227S, Cat. J/A+A/507/227)
4 = Zejda et al. (2012A&A...548A..97Z 2012A&A...548A..97Z, Cat. J/A+A/548/A97)
5 = Kun et al. (2009ApJS..185..451K 2009ApJS..185..451K, Cat. J/ApJS/185/451)
6 = This paper
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History:
From electronic version of the journal
References:
Maskoliunas et al., Paper I 2012BaltA..21..465M 2012BaltA..21..465M, Cat. J/BaltA/21/465
Straizys et al., Paper II 2014MNRAS.437.1628S 2014MNRAS.437.1628S, Cat. J/MNRAS/437/1628
(End) Patricia Vannier [CDS] 16-Jan-2015