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J/A+A/391/547       Binary and multiple clusters in the LMC  (Dieball+, 2002)

A statistical study of binary and multiple clusters in the LMC Dieball A., Mueller H., Grebel E.K. <Astron. Astrophys. 391, 547 (2002)> =2002A&A...391..547D
ADC_Keywords: Associations, stellar; Clusters, globular; Clusters, open; Magellanic Clouds Keywords: (galaxies): Magellanic Clouds - galaxies: star clusters - catalogs Description: Based on the Bica et al. (1999, Cat. J/AJ/117/238) catalogue we studied the star cluster system of the LMC area and provide a new catalogue of all binary and multiple cluster candidates found. As a selection criterion we used a maximum separation of 1.4' corresponding to 20pc (assuming a distance modulus of 18.5mag). We performed Monte Carlo simulations and produced artificial cluster distributions that we compared with the real one in order to check how many of the found cluster pairs and groups can be expected statistically due to chance superposition on the plane of the sky. In the cluster catalogue (file "clusters.dat"), identifiers and remarks, coordinates, object type, maximum and minimum diameter Dmax and Dmin and the position angle (P.A.) are taken from Bica et al. (1999, Cat. J/AJ/117/238). For the acronyms of the objects see the "Nomenclature Notes" section below, where their Table 1 is reproduced. The acronym used in the OGLE catalogue of star clusters in the LMC (e.g., LMC0012, (Pietrzynski & Udalski, 2000AcA....50..337P) is also given. The 9th column gives the separations (d) in pc found in the corresponding group, assuming a distance modulus of 18.5mag. The last column gives the ages available in the literature; the notes given in brackets indicate the reference. In some cases, only an age for the association of which the cluster appears to be part is found. If so, a corresponding remark is given in brackets. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file clusters.dat 248 1126 Catalogue of the LMC multiple clusters (table 6) refs.dat 144 40 References
See also: J/AJ/117/238 : LMC extended catalog (Bica+, 1999) Byte-by-byte Description of file: clusters.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Group Group number 5- 14 A10 --- Cluster Name of the cluster or of the star (1) 16- 67 A52 --- Names Names and remarks (1) 69- 70 I2 h RAh Right ascension (J2000.0) 72- 73 I2 min RAm Right ascension (J2000.0) 75- 76 I2 s RAs Right ascension (J2000.0) 79 A1 --- DE- Declination sign (J2000.0) 80- 81 I2 deg DEd Declination (J2000.0) 83- 84 I2 arcmin DEm Declination (J2000.0) 86- 87 I2 arcsec DEs Declination (J2000.0) 90- 91 A2 --- Type [CAN ] Cluster type (2) 94- 97 F4.2 arcmin DiamMax Maximum diameter of the cluster 100-103 F4.2 arcmin DiamMin Minimum diameter of the cluster 106-108 I3 deg PA ? Position angle 115-118 F4.1 pc Sep Separation in the group 122 A1 --- l_Age Limit flag on Age 123-128 F6.1 Myr Age ? One of the possible ages of the cluster 129 A1 --- u_Age [?] Uncertainty flag on Age 130-134 F5.1 Myr e_Age ? rms uncertainty on Age 135 A1 --- --- [-/] Interval or "two-values" flag 136-141 F6.1 Myr Age2 ? Upper value of Age if interval (-) or other possible Age value (/) 143-145 A3 --- r_Age References for the Age 147-156 A10 --- n_Age Remarks for Age 157-248 A92 --- Ages ? Other values, remarks and references of the cluster ages, separated by commas (3)
Note (1): Different names are separated by commas. See the "Nomenclature Notes" section below for details. Note (2): Type: C: star cluster A: association N: emission nebula Note (3): The method of age determination is indicated in brackets within the reference list
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1 A1 --- Ref Reference code 3- 21 A19 --- BibCode BibCode 23- 43 A21 --- Aut Author's name 45-144 A100 --- Com Comments
Nomenclature Notes: BCDSP6 = BCDSP 6 in Simbad BHnnCn = Not in Simbad BMnnn = BMG nnnn in Simbad BRHTnnn = BRHT nnn in Simbad BSDLnnnn = BSDL nnnn in Simbad Cn = [H75] n in Simbad ESOnnSCnnn = ESO nn- nnn in Simbad H1 = [H60b] 1 in Simbad H80Fn-nn = Hodge, 1980AJ.....85..423H, Not in Simbad HTn = [HT83] n in Simbad H88-nn = H88 nn in Simbad HDnnnnnn = HD nnnnnn in Simbad HDEnnnnnn = HDE nnnnnn in Simbad HSnnnn = [HS66] nnnn in Simbad ICnnnn = IC nnnn in Simbad KMHKnnnn = KMHK nnnn in Simbad KMK88-nn = KMK88 nn in Simbad LMC DEMnnnn, LMC-DEMnnnn = DEM L nnn in Simbad LMC Nnnnn, LMC-Nnnnn = LHA 120-N nnn in Simbad LMC Snn, LMC-Snn = LHA 120-S nn in Simbad LMCnnnn = Not in Simbad LT-beta = [LT84] bet in Simbad LT-delta = [LT84] del in Simbad LWnnn = LW nnn in Simbad NGCnnnn = NGC nnnn in Simbad OHSCnn = OHSC nn in Simbad Rob1 = Not in Simbad SESG2 = SESG C2 in Simbad Sk-66o36 = SK -66 36 in Simbad SLnnnn = [SL63] nnnn in Simbad U1, U2 = Not in Simbad ZHT5 = ZHT AN 5 in Simbad Table 1 of Bica et al., 1999AJ....117..238B ------------------------------------------------------------------------ Acronym Type Reference ------------------------------------------------------------------------ LMC-N N Henize 1956ApJS....2..315H H C Hodge 1960ApJ...131..351H SL C Shapley & Lindsay 1963IrAJ....6...74S LW C Lynga & Westerlund 1963MNRAS.127...31L HS C Hodge & Sexton 1966AJ.....71..363H U C Hodge & Sexton 1966AJ.....71..363H LH A Lucke & Hodge 1970AJ.....75..171L Rob C Robertson 1974A&AS...15..261R LMC-DEM N Davies et al. 1976MmRAS..81...89D C C Hodge 1975IrAJ...12...77H H80-F C Hodge 1980AJ.....85..423H SGshell-LMC N, A Meaburn 1980MNRAS.192..365M Shapley- A, N C van den Bergh 1981A&AS...46...79V SNR N Mathewson et al. 1983ApJS...51..345M HT N Heydari-Malayeri & Testor 1983A&A...118..116H LT- C Lortet & Testor 1984A&A...139..330L SNR N Mathewson et al. 1984ApJS...55..189M SNR N Mathewson et al. 1985ApJS...58..197M HNT NC Heydari-Malayeri et al. 1987A&A...184..300H M-OB C, A Melnick 1987IAUS..121..545M KMK88- C Kontizas et al. 1988AJ.....96.1625K H88- C Hodge 1988PASP..100.1051H BH C Bhatia & Hatzidimitriou 1988MNRAS.230..215B OHSC C Olszewski et al. 1988AJ.....95...84O BM A Bhatia & MacGillivray 1989A&A...211....9B KMHK C Kontizas et al. 1990A&AS...84..527K Cat. VII/183 IDK A Irwin et al. 1990AJ.....99..191I BRHT C Bhatia et al. 1991A&AS...87..335B BD A Battinelli & Demers 1992AJ....104.1458B BCD C Bica et al. 1992AJ....103.1859B SNR N Smith et al. 1994AJ....108.1266S KKDAB- A Kontizas et al. 1994A&AS..107...77K BCDSP C, A Bica et al. 1996ApJS..102...57B ZHT C Zaritsky et al. 1997AJ....114.1002Z ZHT-SP C Zaritsky et al. 1997AJ....114.1002Z SESG C Santiago et al. 1998MNRAS.295..860S BSDL C, N, A Bica et al. 1999AJ....117..238B ------------------------------------------------------------------------ History: Some name corrections made in cluster.dat file on 01-Apr-2003 Acknowledgements: Andrea Dieball
(End) Patricia Bauer [CDS] 10-Jun-2002
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