Access to Astronomical Catalogues

← Click to display the menu
J/A+A/391/857   HST UV,V,I photometry of NGC7673 star clusters (Homeier+, 2002)

The star cluster system of the NGC 7673 starburst. Homeier N., Gallagher III J.S., Pasquali A. <Astron. Astrophys. 391, 857 (2002)> =2002A&A...391..857H
ADC_Keywords: Galaxies, photometry ; Clusters, open ; Photometry, ultraviolet Keywords: galaxies: evolution - galaxies: starburst - galaxies: individual: NGC 7673 - galaxies: interactions - galaxies: star clusters Abstract: We investigate the star cluster system in the starburst galaxy NGC 7673 using archival Hubble Space Telescope WFPC2 broad-band images. For the first time we are able to examine the internal structures of the prominent optical clumps in this galaxy. The clumps are composed of young stars, 16-33% of which are in bright star clusters. We identify 268 star cluster candidates in both the F555W and F814W images, and 50 clusters with the F255W filter. These data allow us to estimate ages and masses using color-magnitude and two-color diagrams for our sample. We find a population of young, <6Myr clusters located throughout the galaxy with concentrations in the clumps. Star cluster mass estimates are 5-50x104M for the brightest objects. The starburst remains active in physically well-separated regions, indicating a widespread starburst trigger. We discuss clump lifetimes, their implications for the future evolution of NGC 7673, and possible relationships to high redshift starbursts. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 71 50 Parameters for clusters detected in the F255W (UV), F555W (V) and F814W (I) filters
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 A4 --- [HGP2002] Cluster designation 6- 7 I2 h RAh Right ascension (J2000) 9- 10 I2 min RAm Right ascension (J2000) 12- 16 F5.2 s RAs Right ascension (J2000) 18 A1 --- DE- Declination sign (J2000) 19- 20 I2 deg DEd Declination (J2000) 22- 23 I2 arcmin DEm Declination (J2000) 25- 29 F5.2 arcsec DEs Declination (J2000) 31- 35 F5.2 mag [255-555] Colour index [F255W-F555W] ([UV-V]) 37- 40 F4.2 mag e_[255-555] rms uncertainty on [255-555] 42- 46 F5.2 mag [555-814] Colour index [F555W-F814W] ([V-I]) 48- 51 F4.2 mag e_[555-814] rms uncertainty on [555-814] 53- 57 F5.2 mag F555Wmag F555W magnitude (Vmag) 59- 62 F4.2 mag e_F555Wmag rms uncertainty on F555Wmag 64- 70 A7 --- Region Region (1)
Note (1): Region designations: Clump B, Clump C, Nuclear or field. Clumps are labeled following the notation of Duflot-Augarde & Alloin (1982A&A...112..257D).
History: From electronic version of the journal
(End) Patricia Bauer [CDS] 08-Oct-2002
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

catalogue service

© UDS/CNRS

Contact