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J/AJ/107/1054         UBV photometry of the 30 Dor region   (Malumuth+, 1994)

UBV stellar photometry of the 30 Doradus region of the Large Magellanic Cloud with the Hubble Space Telescope Malumuth E.M., Heap S.R. <Astron. J. 107, 1054 (1994)> =1994AJ....107.1054M
ADC_Keywords: H II regions ; Photometry, UBV Abstract: We report on Planetary Camera observations of the central region of 30 Doradus in the Large Magellanic Cloud. These images of 30 Doradus are the first "deep" HST exposures that have appropriate photometric calibration. The B band (F439W) image, which shows R136a at the center of the PC6 CCD chip, reveals over 200 stars within 3" of the center of R136a, and over 800 stars in a 35"x35" area. We used Malumuth et al.'s [The First Year of HST Observations, edited by A. L. Kinney and J. C. Blades (ST ScI, Baltimore) (1991)] PSF-fitting method to measure the magnitudes of all stars on the PC6 chip. These new B magnitudes, along with U and V magnitudes from archival PC images, yield a luminosity function, mass density profile, and initial mass function of the 30 Doradus ionizing cluster. The mass distribution is well fit by a King model with a core radius, Rc=0.96" (0.24pc), a tidal radius, Rt=110" (28pc), and a total mass, M=16800M. Both the luminosity function and initial mass function show evidence for mass segregation, in the sense that the central region has a higher fraction of massive stars than the outer regions. This is the first observational evidence for mass segregation in a very young cluster (age ∼3 million years). The observations admit the hypothesis that the mass segregation occurred in the process of star formation and/or that the mass segregation is the result of dynamical evolution. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file aasman.sty 77 164 aasmanuscript.sty LaTeX style file table2.tex 99 1130 LaTeX version of table2.dat table2.dat 48 1010 30 Doradus photometry
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 I4 --- ID Identification number (Cl* NGC 2070 MH in Simbad) 7- 8 I2 h RAh Right ascension J2000 10- 11 I2 min RAm Right ascension J2000 13- 17 F5.2 s RAs Right ascension J2000 19 A1 --- DE- Declination sign 20- 21 I2 deg DEd Declination J2000 23- 24 I2 arcmin DEm Declination J2000 26- 29 F4.1 arcsec DEs Declination J2000 32- 36 F5.2 mag Umag ? Johnson U magnitude 38- 42 F5.2 mag Bmag ? Johnson B magnitude 44- 48 F5.2 mag Vmag ? Johnson V magnitude -------------------------------------------------------------------------------- Table 3. Other designations for bright stars. ----------------------------------------------- ID # Name Parker # Campbell # ----------------------------------------------- #17 Melnick 36 706 6019 #57 Melnick 39 767 6003 #71 R 134 786 6001 #283 Melnick 37Wb 897 6018 #339 Melnick 37Wa 917 6005 #374 Melnick 42 922 6002 #454 R 136a6 #467 R 136a3 #474 R 136a4 #480 R 136a8 #493 Melnick 37 949 6007 #498 R 136a1 #509 R 136a7 #511 R 136a2 #519 R 136a5 #637 R 136b 985 26 #681 R 136c 998 25 #716 Melnick 35N 1013 6017 #728 Melnick 30 1018 7005 #742 Melnick 35 1029 6006 #749 Melnick 35Sa 1036 6010 #859 Melnick 33Sb 1111 6013 #870 Melnick 33Sa 1120 6009 #878 Melnick 32 1130 7003 #880 Melnick 34 1134 6004 #887 Melnick 33Na 1140 6008 #900 Melnick 33Nb 1152 6014 #959 R 141 1253 7002 #963 Melnick 24 1260 7009 #980 Melnick 15Sb 1304 7029 #983 Melnick 15Sa 1306 7021 #984 Melnick 15 1312 7160 #986 Melnick 14N 1317 6020 #999 Melnick 14 1350 5004
Origin: AAS CD-ROM series, Volume 2, 1994
(End) L. Brotzman [ADS] 05-May-1994, P. Bauer, J. Marcout [CDS] 19-Oct-1994
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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