J/AcA/50/355 OGLE Multiple Cluster Candidates in LMC (Pietrzynski+, 2000)
The Optical Gravitational Lensing Experiment.
Multiple Cluster Candidates in the Large Magellanic Cloud.
Pietrzynski G., Udalski A.
<Acta Astron., 50, 355 (2000)>
=2000AcA....50..355P 2000AcA....50..355P
ADC_Keywords: Magellanic Clouds ; Associations, stellar
Keywords: Magellanic Clouds - galaxies: star clusters
Abstract:
We present 100 multiple cluster candidates selected from the OGLE
catalog of star clusters in the Large Magellanic Cloud. Statistical
analysis shows that the significant fraction of these objects may
constitute physical systems. Coeval ages of 102 components of multiple
objects suggest their common origin. 53 components have very
different ages. The comparison of the population of multiple clusters
candidates from the SMC and the LMC shows that: a) distributions of
sizes and ages of multiple and single clusters from the Magellanic
Clouds are very similar, b) the difference of sizes of components of a
given system is small, c) in both distributions of separation of
multiple clusters from the LMC and SMC two peaks are seen at about
9pc and 15pc, d) both age distributions reveal peaks around 100Myr,
which may be connected with the last encounter of the LMC and the SMC.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 50 245 The multiple cluster candidates from the LMC
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See also:
J/AcA/49/521 : OGLE LMC star clusters BVI photometry (Pietrzynski+, 1999)
J/AcA/50/337 : OGLE LMC star clusters (Pietrzynski+, 2000)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [LMC]
4- 7 I4 --- OGLE-CL Sequential number (OGLE-CL-LMC NNN)
10 I1 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 19 F5.2 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- 31 F4.1 arcsec DEs Declination (J2000)
34- 35 I2 arcsec Rad Apparent radius of cluster
37 A1 --- l_logt Limit flag on logt
38- 41 F4.2 [yr] logt ? Cluster age
42 A1 --- --- [,]
43- 45 F3.1 [yr] logt2 ? Second value of cluster age
47- 50 F4.2 [yr] e_logt ? rms uncertainty on logt
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History:
Prepared via OCR at CDS.
(End) James Marcout, Patricia Vannier [CDS] 15-Sep-2003