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J/ApJ/456/174          Intermediate-Mass Population in NGC 604 (Hunter+ 1996)

The intermediate stellar mass population in NGC 604 determined from Hubble Space Telescope Images Hunter D.A., Baum W.A., O'Neil E.J.JR., Lynds R. <Astrophys. J. 456, 174 (1996)> =1996ApJ...456..174H
ADC_Keywords: H II regions ; Stars, giant ; Photometry Keywords: galaxies: individual (M33) - galaxies: photometry - galaxies: star clusters - galaxies: stellar content - HII regions - ISM: individual (NGC 604) - stars: luminosity function, mass function Abstract: We present photometry of stars in the giant H II region NGC 604 in M33. The photometry is measured from Hubble Space Telescope images through the F336W, F555W, and F814W broadband filters. Color- magnitude diagrams of the stars in NGC 604 show a main sequence detected down to an M_F555W,0 of -1 (nearly 6M). In addition, there are luminous stars that are probably blue and red supergiants. Based on the previously known presence of Wolf-Rayet stars, we take the age of the cluster to be 3-5Myr. We measure an initial mass function for intermediate-mass stars (6.5-18M) that has a slope of -1.6±0.7. This slope is, within the uncertainties, similar to those found for OB associations in the Milky Way and Magellanic Clouds. The density of the luminous stars in NGC 604 is also comparable to that of OB associations in those galaxies even though the total number of stars is greater in NGC 604. A few subclamps have densities that are higher by as much as a factor of 10. A comparison with R136 in the LMC emphasizes that the formation of a large number of massive stars does not necessarily entail a high concentration of those stars. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 01 34 32.8 +30 47 04 NGC 604 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 90 34484 Photometry
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 I6 --- Star *Star identification number 8- 13 F6.1 pix X X pixel coord relative to Fig. 1 in paper 15- 20 F6.1 pix Y Y pixel coord relative to Fig. 1 in paper 22- 27 F6.2 mag F336W ?=100.00 F336W magnitude 29- 34 F6.2 mag e_F336W ?=100.00 F336W magnitude uncertainty 36- 41 F6.2 mag F555W ?=100.00 F555W magnitude 43- 48 F6.2 mag e_F555W ?=100.00 F555W magnitude uncertainty 50- 55 F6.2 mag F814W ?=100.00 F814W magnitude 57- 62 F6.2 mag e_F814W ?=100.00 F814W magnitude uncertainty 64- 69 F6.2 mag F336W-F555W ?=100.00 F336W-F555W color 71- 76 F6.2 mag e_F336W-F555W ?=100.00 F336W-F555W color uncertainty 78- 83 F6.2 mag F555W-F814W ?=100.00 F555W-F814W color 85- 90 F6.2 mag e_F555W-F814W ?=100.00 F555W-F814W color uncertainty
Note on Star: Star identification number. The first significant digit is the chip number; the second is the stellar group number (cluster or background); and the rest is the individual star number.
Origin: AAS CD-ROM series, Volume 6, 1996 Lee Brotzman [ADS] 22-Apr-96
(End) [CDS] 05-Sep-1996
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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