J/A+AS/134/489 Be stars in MC young clusters (Keller+ 1999) ================================================================================ Be stars in and around young clusters in the Magellanic Clouds Keller S.C., Wood P.R., Bessell M.S. =1999A&AS..134..489K (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Stars, Be ; Magellanic Clouds ; Photometry ; Clusters, open Keywords: stars: emission-line - stars: Be - galaxies: clusters - galaxies: Magellanic Clouds Abstract: We present the results of a search for Be stars in six fields centered on the young clusters NGC 330 and NGC 346 in the SMC, and NGC 1818, NGC 1948, NGC 2004 and NGC 2100 in the LMC. Be stars were identified by differencing R band and narrow-band H{alpha} CCD images. Our comparatively large images provide substantial Be star populations both within the clusters and in their surrounding fields. Magnitudes, positions and finding charts are given for the 224 Be stars found. The fraction of Be stars to normal B stars within each cluster is found to vary significantly although the average ratio is similar to the average Be to B star ratio found in the Galaxy. In some clusters, the Be star population is weighted to magnitudes near the main sequence turn-off. The Be stars are redder in V-I than normal main-sequence stars of similar magnitude and the redness increases with increasing H{alpha} emission strength. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file ngc1818.dat 69 40 H{alpha} emission stars near NGC 1818 ngc1948.dat 62 27 H{alpha} emission stars near NGC 1948 ngc2004.dat 62 67 H{alpha} emission stars near NGC 2004 ngc2100.dat 70 60 H{alpha} emission stars near NGC 2100 ngc330.dat 74 76 H{alpha} emission stars near NGC 330 ngc346.dat 66 48 H{alpha} emission stars near NGC 346 tables.ps 72 863 PostScript version of the tables tables.tex 164 344 LaTeX version of the tables -------------------------------------------------------------------------------- See also: J/AJ/108/932 : Variable stars in the SMC cluster NGC 330 (Sebo+, 1994) J/A+A/317/448 : BVRHalpha photometry of NGC 1818 (Grebel 1997) Byte-by-byte Description of file: ngc*.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 19 A19 --- Name IAU designation (starting bye the cluster name) 21- 22 I2 h RAh Right ascension (J2000) 24- 25 I2 min RAm Right ascension (J2000) 27- 30 F4.1 s RAs Right ascension (J2000) 32 A1 --- DE- Declination sign 33- 34 I2 deg DEd Declination (J2000) 36- 37 I2 arcmin DEm Declination (J2000) 39- 40 I2 arcsec DEs Declination (J2000) 42- 46 F5.2 mag Vmag V magnitude 48- 52 F5.2 mag V-I V-I colour index 54- 57 F4.2 mag R-Ha R-H{alpha} colour index 59- 78 A20 --- Names Other names (1) -------------------------------------------------------------------------------- Note (1): Other designations; A/B/C/D refer to Robertson, 1974A&AS...15..261R Bal to Balona, 1992MNRAS.256..425B sw to Sebo and Wood, 1994, Cat. -------------------------------------------------------------------------------- Acknowledgements: Stephan Keller History: * 17-Mar-1999: In table "ngc2100.dat", star #428, mis-identification is C24 instead of B24. ================================================================================ (End) Patricia Bauer [CDS] 06-Nov-1998