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J/AJ/140/379        Stellar associations in M51              (Kaleida+, 2010)

Mapping the recent star formation history of the disk of M51. Kaleida C., Scowen P.A. <Astron. J., 140, 379-389 (2010)> =2010AJ....140..379K
ADC_Keywords: Galaxies, nearby ; Associations, stellar ; Photometry Keywords: galaxies: photometry - galaxies: star clusters: general - Hertzsprung-Russell and C-M diagrams - stars: early-type - surveys Abstract: Using data acquired as part of a unique Hubble Heritage imaging program of broadband colors of the interacting spiral system M51/NGC5195, we have conducted a photometric study of the stellar associations across the entire disk of the galaxy in order to assess trends in size, luminosity, and local environment associated with the recent star formation (SF) activity in the system. Starting with a sample of over 900 potential associations, we have produced color-magnitude and color-color diagrams for the 120 associations that were deemed to be single-aged. Description: The data sets used in this study were obtained with the HST ACS/WFC as part of HST program 10452, which was completed in 2005 January and became publicly available in 2005 April (Mutchler et al. 2005, BAAS, 37, 452). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 113 121 Stellar association parameters for 120 single-aged associations in the M51/NGC5195 system
See also: J/A+A/309/446 : HII Regions in M51 (Petit+, 1996) J/A+A/397/473 : HST photometry of M51 cluster (Bik+, 2003) J/ApJ/601/735 : M51 luminous X-ray sources (Terashima+, 2004) J/ApJ/633/871 : Positions and photometry of HII knots in M51 (Calzetti+, 2005) J/AJ/135/1567 : Bright star clusters in M51 (Hwang+, 2008) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 25 A25 --- ID Identifier (1) 27- 28 I2 h RAh Right ascension (J2000) 30- 31 I2 min RAm Right ascension (J2000) 33- 39 F7.4 s RAs Right ascension (J2000) 41 A1 --- DE- Declination sign (J2000) 42- 43 I2 deg DEd Declination (J2000) 45- 46 I2 arcmin DEm Declination (J2000) 48- 54 F7.4 arcsec DEs Declination (J2000) 56- 61 F6.2 mag BMAGi B band total integrated magnitude (2) 63- 68 F6.2 mag VMAGi V band total integrated magnitude (2) 70- 75 F6.2 mag IMAGi I band total integrated magnitude (2) 77- 82 F6.2 mag BMAG* B band total magnitude from summing all sources in the association (3) 84- 89 F6.2 mag VMAG* V band total magnitude from summing all sources in the association (3) 91- 96 F6.2 mag IMAG* I band total magnitude from summing all sources in the association (3) 98-101 F4.1 pc Rad Average radius of the association (4) 103-109 E7.3 Msun Mass Mass of the association 111-113 I3 Myr Age Age of the association
Note (1): Associations identified as [KS2010] JHHMMSS.ssss+DDMMSS.sss in Simbad. Note (2): Total integrated magnitude from a circular aperture of radius and central position as listed in the table. Note (3): This value will not include diffuse light from unresolved stars, and is thus a lower limit of the magnitude of the association. Note (4): Average radius of the association as determined by the average FWHM of the flux density distribution.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 11-Jun-2012
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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