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J/MNRAS/353/601     2dF survey of the Small Magellanic Cloud      (Evans+, 2004)

A 2dF survey of the Small Magellanic Cloud. Evans C.J., Howarth I.D., Irwin M.J., Burnley A.W., Harries T.J. <Mon. Not. R. Astron. Soc. 353, 601 (2004)> =2004MNRAS.353..601E
ADC_Keywords: Magellanic Clouds ; MK spectral classification ; Photometry, UBVRI ; Stars, early-type ; Stars, emission Keywords: stars: early-type - stars: emission-line, Be - stars: fundamental parameters - Hertzsprung-Russell (HR) diagram - Magellanic Clouds Abstract: We present a catalogue of new spectral types for hot, luminous stars in the Small Magellanic Cloud. The catalogue contains 4161 objects, giving an order of magnitude increase in the number of SMC stars with published spectroscopic classifications. The targets are primarily B- and A-type stars (2862 and 853 objects respectively), with 1 Wolf-Rayet, 139 O-type, and 306 FG stars, sampling the main sequence to ∼mid-B. The selection and classification criteria are described, and objects of particular interest are discussed, including UV-selected targets from the Ultraviolet Imaging Telescope (UIT) experiment, Be and B[e] stars, `anomalous A supergiants', and composite-spectrum systems. We examine the incidence of Balmer-line emission, and the relationship between H-gamma equivalent width and absolute magnitude for BA stars. Description: Spectral classifications and adopted photometry for 4161 stars in the Small Magellanic Cloud, observed with 2dF instrument. Also given are correspondences between the stars observed with 2dF and other catalogues . File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tab2df.dat 89 4161 Basic results of the SMC 2dF survey tabmatch.dat 188 4161 Correspondences between stars in the 2dF survey and other catalogues notes.dat 80 44 Detailed classification notes very kindly provided by R.O. Gray
See also: VII/226 : The 2dF Galaxy Redshift Survey 100k Data Release (2dFGRS Team, 2001) VII/223 : The 2dF QSO Redshift Survey. V. The 10k catalogue (Croom+ 2001) II/236 : UBVR CCD survey of the Magellanic clouds (Massey+, 2002) J/AcA/48/147 : OGLE SMC BVI photometry (Udalski+ 1998) Byte-by-byte Description of file: tab2df.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Name 2dFS serial number (1) 5 A1 --- n_Name [*] indicates a note in "notes.dat" file 7- 8 I2 h RAh Right Ascension J2000 (hours) 11- 12 I2 min RAm Right Ascension J2000 (minutes) 15- 19 F5.2 s RAs Right Ascension J2000 (seconds) 22 A1 --- DE- Declination J2000 (sign) 23- 24 I2 deg DEd Declination J2000 (degrees) 27- 28 I2 arcmin DEm Declination J2000 (minutes) 31- 34 F4.1 arcsec DEs [0,60] Declination J2000 (seconds) 38- 42 F5.2 mag Bmag Adopted B magnitude 46 A1 --- r_Bmag Source of adopted B magnitude (2) 51- 70 A20 --- SpType Adopted spectral subtype and luminosity class 72- 89 A18 --- Balmer Balmer-line summary (3)
Note (1): 2dFS 1-4054, APM-selected stars; 2dFS 5001-5107, UIT-selected stars. Note (2): Sources of adopted B magnitudes are the following: A = APM, 2000, Cat. I/267 M = Massey P., 2002ApJS..141...81M, Cat. II/236 O = OGLE, Udalski et al. 1998, J/AcA/48/147 Z = Zaritsky et al., 2002, Cat. J/AJ/123/855 Note (3): Balmer-line summary in blue (B: g=H-gamma, b=H-beta), red (R: Hα), and long-slit (L: Hα) spectra. Balmer-line characteristics are coded as: a = absorption n = narrow (nebular?) emission r = resolved (but narrow) emission d = double-peaked emission p = P Cygni profile e = broad single-peaked emission
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Name 2DF designation 6- 80 A75 --- Note Text of the note
Byte-by-byte Description of file: tabmatch.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Name 2dFS serial number 7- 11 F5.2 mag BmagA APM B magnitude 14- 18 F5.2 mag RmagA APM R magnitude 21- 25 I5 --- [M2002] ?=000 Massey (2002, Cat. II/236) catalogue number, [M2002] SMC NNNNNN in Simbad (4) 28- 32 F5.2 mag UmagM ?=99.99 Massey U magnitude 35- 39 F5.2 mag BmagM ?=99.99 Massey B magnitude 42- 46 F5.2 mag VmagM ?=99.99 Massey V magnitude 49- 53 F5.2 mag RmagM ?=99.99 Massey R magnitude 59- 67 F9.6 --- OGLE ?=99.999 OGLE (Udalski et al. 1998, J/AcA/48/147) identification (4) (5) 70- 74 F5.2 mag BmagO ?=99.99 OGLE B 77- 81 F5.2 mag VmagO ?=99.99 OGLE V 84- 88 F5.2 mag ImagO ?=99.99 OGLE I 90-106 A17 --- [ZHT2002] Zaritsky et al. (2002, Cat. J/AJ/123/855) identification (?=9.999999-99.99999) (4) 110-114 F5.2 mag BmagZ ?=99.99 Zaritsky B magnitude 117-121 F5.2 mag VmagZ ?=99.99 Zaritsky V magnitude 123-124 I2 --- Flag Flag (from Zaritsky et al.) (6) 126-130 I5 --- [PHC98] ?=0 UIT identification (Parker et al. 1998, Cat. J/AJ/116/180) (4) 133-135 I3 --- Sk ?=000 Sanduleak (1968AJ.....73..246S) number (4) 138-140 I3 --- AzV ?=000 Azzopardi & Vigneau (1975, Cat. V/13) number (4) 143-146 I4 --- [MA93] ?=000 Meyssonnier & Azzopardi (1993, Cat. J/A+AS/102/451) number (4) 148-188 A41 --- Notes Cluster memberships and other matches (7)
Note (4): Photometric, [PHC98], and [MA93] catalogues are matched solely on positional coincidence; Sk and AzV matches are cross-identifications. "000" means no match; subsequent photometry given as 99.99 means no data. Note (5): OGLE designation: NN.NNNNNN, OGLE SMC-SCNN NNNNNN in Simbad Note (6): The unique sum of several flags: 0 = no flag 1 = star for which we replaced photometry with that from Massey's catalog (Massey P., 2002ApJS..141...81M, Cat. II/236)) 2 = star for which we replaced photometry with that from OGLE 10 = star with a successful stellar atmosphere model (χ2<3) fit 20 = star with an unsuccessful stellar atmosphere model fit. Note (7): Cluster membership information using the catalogue of Bica & Dutra (2000, Cat. J/AJ/119/1214), plus incomplete matching with the catalogues of Henize (1956, Cat. J/ApJS/2/315) and Lindsay (1961AJ.....66..169L, Lin NNNa).
Acknowledgements: Chris Evans <cje(at)>
(End) Chris Evans [ING, La Palma], Patricia Vannier [CDS] 19-Jul-2004
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