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J/AJ/129/729       CCD photometry of luminous stars in M33         (Rowe+, 2005)

Carbon stars and other luminous stellar populations in M33. Rowe J.F., Richer H.B., Brewer J.P., Crabtree D.R. <Astron. J., 129, 729-744 (2005)> =2005AJ....129..729R
ADC_Keywords: Stars, carbon ; Photometry ; Galaxies, nearby ; Stars, luminous Keywords: galaxies: individual (M33) - galaxies: stellar content - stars: carbon Abstract: The M33 galaxy is a nearby, relatively metal-poor, late-type spiral. Its proximity and almost face-on inclination means that it projects over a large area on the sky, making it an ideal candidate for wide-field CCD mosaic imaging. Photometry was obtained for more than 106 stars covering a 74'x56' field centered on M33. Main-sequence, supergiant branch, red giant branch, and asymptotic giant branch (AGB) populations are identified and classified based on broadband V and I photometry. Narrowband filters are used to measure spectral features allowing, the AGB population to be further divided into C and M star types. The galactic structure of M33 is examined using star counts, color-color, and color-magnitude-selected stellar populations. We use the C to M star ratio to investigate the metallicity gradient in the disk of M33. Description: Multiband photometric data were collected on 1999 October 30 and 31 and 2000 December 3 and 4 with the 3.58m Canada-France-Hawaii Telescope (CFHT). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 105 12109 Object catalog for M33
See also: J/AJ/125/1298 : C star population in outer disk of M31 (Battinelli+, 2003) J/ApJ/469/629 : UV-brightest stars of M33 and its nucleus (Massey+ 1996) Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 5 I5 --- Seq Star identification number 7 I1 h RAh Hour of Right Ascension (J2000) 9- 10 I2 min RAm Minute of Right Ascension (J2000) 12- 16 F5.2 s RAs Second of Right Ascension (J2000) 17 A1 --- DE- Sign of the Declination (J2000) 18- 19 I2 deg DEd Degree of Declination (J2000) 21- 22 I2 arcmin DEm Arcminute of Declination (J2000) 24- 28 F5.2 arcsec DEs Arcsecond of Declination (J2000) 30- 36 F7.4 mag Vmag ?=99.9990 Mould V band magnitude (1) 38- 43 F6.4 mag e_Vmag ?=9.9990 ALLSTAR 1σ error in Vmag 45- 51 F7.4 mag Imag ?=99.9990 Mould I band magnitude (1) 53- 58 F6.4 mag e_Imag ?=9.9990 ALLSTAR 1σ error in Imag 60- 66 F7.4 mag CNmag ?=99.9990 CN band magnitude (1) 68- 73 F6.4 mag e_CNmag ?=9.9990 ALLSTAR 1σ error in CNmag 75- 81 F7.4 mag TiOmag ?=99.9990 TiO band magnitude (1) 83- 88 F6.4 mag e_TiOmag ?=9.9990 ALLSTAR 1σ error in TiOmag 90- 96 F7.4 --- chi2 The χ2 DAOPhot value for the PSF fit 98-105 F8.4 --- Sharp The sharp DAOPhot value for the PSF fit
Note (1): The filter passbands are: --------------------------------- Filter Central Bandwidth Wavelength --------------------------------- MouldV 537.4nm 97.4nm MouldI 822.3 216.4 TiO 777.7 18.4 CN 812.0 12.1 ---------------------------------
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 07-Jul-2005
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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