J/AJ/142/71 Proper motions and photometry of stars near NGC7380 (Chen+, 2011)
A kinematic and photometric study of the galactic young star cluster NGC 7380.
Chen W.P., Pandey A.K., Sharma S., Chen C.W., Chen L., Sperauskas J.,
Ogura K., Chuang R.J., Boyle R.P.
<Astron. J., 142, 71 (2011)>
=2011AJ....142...71C 2011AJ....142...71C
ADC_Keywords: Clusters, open ; Proper motions ; Radial velocities ;
Photometry, infrared
Keywords: open clusters and associations: individual (NGC 7380) -
stars: formation - stars: luminosity function, mass function -
stars: pre-main sequence
Abstract:
We present proper motions, radial velocities, and a photometric study
of the Galactic open cluster NGC 7380, which is associated with
prominent emission nebulosity and dark molecular clouds. On the basis
of the sample of highly probable member stars, the star cluster is
found to be at a distance of 2.6±0.4kpc, has an age of around 4Myr,
and a physical size of ∼6pc across with a tidal structure. The binary
O-type star DH Cep is a member of the cluster in its late stage of
clearing the surrounding material, and may have triggered the ongoing
star formation in neighboring molecular clouds which harbor young
stars that are coeval and comoving with, but not gravitationally bound
by, the star cluster.
Description:
CCD UBVIc observations were obtained using the 105cm Schmidt
telescope of the Kiso Observatory on 2004 November 17,
2005 November 24, and 2007 October 31.
Additional CCD images of NGC 7380 taken with interference filters
Hα, [SII], and [OIII] were obtained with the Lulin One-meter
Telescope in 2008 August ([SII] and [OIII]) and in 2010 September.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 121 498 Proper motions and photometry of stars near NGC 7380
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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- 2 I2 h RAh Hour of Right Ascension (J2000)
4- 5 I2 min RAm Minute of Right Ascension (J2000)
7- 11 F5.2 s RAs Second of Right Ascension (J2000)
13 A1 --- DE- Sign of the Declination (J2000)
14- 15 I2 deg DEd Degree of Declination (J2000)
17- 18 I2 arcmin DEm Arcminute of Declination (J2000)
20- 23 F4.1 arcsec DEs Arcsecond of Declination (J2000)
25- 31 F7.3 mas/yr pmRA SHAO proper motion along RA (1)
33- 37 F5.3 mas/yr e_pmRA Uncertainty in pmRA
39- 45 F7.3 mas/yr pmDE SHAO proper motion along DE (1)
47- 51 F5.3 mas/yr e_pmDE Uncertainty in pmDE
53- 57 F5.1 mas/yr pmRA3 UCAC3 proper motion along RA (Cat. I/315)
59- 62 F4.1 mas/yr e_pmRA3 Uncertainty in pmRA3
64- 68 F5.1 mas/yr pmDE3 UCAC3 proper motion along DE (Cat. I/315)
70- 73 F4.1 mas/yr e_pmDE3 Uncertainty in pmDE3
75- 80 F6.3 mag Bmag The B band magnitude
82- 86 F5.3 mag V-I The (V-I) color index
88- 93 F6.3 mag U-B The (U-B) color index
95-100 F6.3 mag B-V The (B-V) color index
102-107 F6.3 mag Jmag 2MASS J band magnitude
109-114 F6.3 mag Hmag 2MASS H band magnitude
116-121 F6.3 mag Kmag 2MASS Ks band magnitude
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Note (1): proper motions measured at the Shanghai Astronomical Observatory,
uqing the photographic plates taken by the 40cm double astrograph at
Sheshan Station.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 03-Nov-2012