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J/ApJS/161/118    byHα photometry in open clusters     (McSwain+, 2005)

The evolutionary status of Be stars: results from a photometric study of southern open clusters. McSwain M.V., Gies D.R. <Astrophys. J. Suppl. Ser., 161, 118-146 (2005)> =2005ApJS..161..118M
ADC_Keywords: Clusters, open ; Stars, Be ; Stars, emission ; Photometry, uvby Keywords: open clusters and associations: individual (Basel 1, Bochum 13, Collinder 272, Haffner 16, Hogg 16, Hogg 22, IC 2395, IC 2581, IC 2944, NGC 2343, NGC 2362, NGC 2367, NGC 2383, NGC 2384, NGC 2414, NGC 2421, NGC 2439, NGC 2483, NGC 2489, NGC 2571, NGC 2659, NGC 3293, NGC 3766, NGC 4103, NGC 4755, NGC 5281, NGC 5593, NGC 6178, NGC 6193, NGC 6200, NGC 6204, NGC 6231, NGC 6249, NGC 6250, NGC 6268, NGC 6322, NGC 6425, NGC 6530, NGC 6531, NGC 6604, NGC 6613, NGC 6664, Ruprecht 79, Ruprecht 119, Ruprecht 127, Ruprecht 140, Stock 13, Stock 14, Trumpler 7, Trumpler 18, Trumpler 20, Trumpler 27, Trumpler 28, Trumpler 34, vdB-Hagen 217) - stars: emission-line, Be Abstract: Be stars are a class of rapidly rotating B stars with circumstellar disks that cause Balmer and other line emission. There are three possible reasons for the rapid rotation of Be stars: they may have been born as rapid rotators, spun up by binary mass transfer, or spun up during the main-sequence (MS) evolution of B stars. To test the various formation scenarios, we have conducted a photometric survey of 55 open clusters in the southern sky. Of these, five clusters are probably not physically associated groups and our results for two other clusters are not reliable, but we identify 52 definite Be stars and an additional 129 Be candidates in the remaining clusters. Description: We made photometric observations of the clusters over 14 nights between 2002 March 27-April 2 and 2002 June 1925 with the CTIO (Cerro Tololo Inter-American Observatory) 0.9m telescope and SITe 2048 CCD. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 114 17541 Photometry of selected stars in open clusters table2.dat 70 55 Summary of open clusters refs.dat 98 34 References table4.dat 37 48 Distribution of open clusters
See also: J/ApJ/622/1052 : byHα photometry of NGC 3766 (McSwain+, 2005) J/A+A/402/549 : UBVRIHα photometry of NGC 3293 (Baume+, 2003) VII/229 : Optically visible open clusters and Candidates (Dias+ 2002-2005) J/A+A/373/153 : CCD Δa-photometry of 5 open clusters (Paunzen+, 2001) J/A+A/360/529 : BVI photometry of 4 young open clusters (Piatti+, 2000) J/A+A/370/931 : BVI photometry of 4 open clusters (Piatti+, 2001) J/A+A/369/511 : Open star clusters. III. NGC 4103, 5281, 4755 (Sanner+, 2001) J/A+AS/124/13 : UBVRI photometry of the cluster Collinder 272 (Vazquez+ 1997) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Cluster Cluster name 15- 18 I4 --- MG Star identifying number (1) 20- 21 I2 h RAh Hour of Right ascension (J2000.0) 23- 24 I2 min RAm Minute of Right ascension (J2000.0) 26- 30 F5.2 s RAs Second of Right ascension (J2000.0) 32 A1 --- DE- Sign of the Declination (J2000.0) 33- 34 I2 deg DEd Degree of Declination (J2000.0) 36- 37 I2 arcmin DEm Arcminute of Declination (J2000.0) 39- 42 F4.1 arcsec DEs Arcsecond of Declination (J2000.0) 44- 49 F6.3 mag ymag Stromgren y magnitude 51- 55 F5.3 mag e_ymag 1σ error in ymag 57- 62 F6.3 mag b-y Stromgren b-y color index 64- 68 F5.3 mag e_b-y 1σ error in b-y 70- 75 F6.3 mag y-Ha y-Hα color index 77- 81 F5.3 mag e_y-Ha 1σ error in y-Ha 83- 85 A3 --- Code Code for type (2) 87- 93 I7 --- Webda ? The WEBDA identification number 95-114 A20 --- OName Other identification
Note (1): Star identified as Cl* "Cluster" MG "MG", Cl* VDBH 217 MG NNN for "vdB-Hagen 217" cluster. Note (2): Code for type, defined as follows: B = B-type star; Be = definite Be star; Be? = possible Be star; O = other stars in the field; F = probable foreground star.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Cluster Cluster name 14 A1 --- q_Cluster Reliability of cluster parameters (1) 16- 17 I2 h RAh Hour of Right Ascension (J2000.0) 19- 20 I2 min RAm Minute of Right Ascension (J2000.0) 22- 23 I2 s RAs Second of Right Ascension (J2000.0) 25 A1 --- DE- Sign of the Declination (J2000.0) 26- 27 I2 deg DEd Degree of Declination (J2000.0) 29- 30 I2 arcmin DEm Arcminute of Declination (J2000.0) 32- 33 I2 arcsec DEs Arcsecond of Declination (J2000.0) 35- 38 F4.2 mag E(b-y) Color excess 40- 44 F5.2 mag V0-MV Distance modulus 46- 49 F4.2 [yr] logAge Log of age 51 I1 --- Be Number of definite Be stars 53- 54 I2 --- Be? Number of possible Be stars 56 A1 --- l_B+Be [>] Lower limit flag on N(B*) 57- 59 I3 --- B+Be Number of B and Be stars identified 61- 70 A10 --- Ref References, detailed in refs.dat
Note (1): Flag on Cluster, defined as follows: a = Cluster parameters unreliable. b = May not be a true cluster. c = May contain PMS Herbig Be stars.
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Ref Reference number 4- 22 A19 --- Bibcode Bibcode 24- 42 A19 --- Aut Author's name 44- 98 A55 --- Com Comment
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Cluster Cluster name 15- 20 F6.2 deg GLON Galactic longitude 22- 26 F5.2 deg GLAT Galactic latitude 28- 31 F4.2 kpc Dist Distance to the Sun 33- 37 F5.2 kpc DistGC Distance to the Galactic Center
History: From electronic version of the journal References: McSwain & Gies, Paper I 2005ApJ...622.1052M, Cat. J/ApJ/622/1052
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 12-Jul-2006
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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