Access to Astronomical Catalogues

← Click to display the menu
J/A+A/371/497  OB associations in the spiral galaxy NGC 300 (Pietrzynski+, 2001)

A catalog of OB associations in the spiral galaxy NGC 300. Pietrzynski G., Gieren W., Fouque P., Pont F. <Astron. Astrophys. 371, 497 (2001)> =2001A&A...371..497P
ADC_Keywords: Associations, stellar ; Stars, OB Keywords: galaxies: NGC 300: star clusters - galaxies: stellar content - stars: early type Abstract: We present results of a search for OB associations in NGC 300. Using an automatic and objective method (PLC technique) 117 objects were found. Statistical tests indicate that our sample is contaminated by less than 10 detections due to random concentrations of blue stars. Spatial distributions of detected associations and H II regions are strongly correlated. The size distribution reveals a significant peak at about 60µrad which corresponds to 125 parsecs if a distance modulus of 26.66mag is assumed. Besides the objects with sizes corresponding to typical associations we also found several much larger objects. A second level application of our detection method revealed that most of these are composed of smaller subgroups, with sizes of about 100pc. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 60 117 OB association candidates in NGC 300 table3.dat 60 36 OB association candidates in the NGC 300 found in the regions of potential stellar-complexes
Byte-by-byte Description of file: table1.dat table3.dat
Bytes Format Units Label Explanations
1- 6 A6 --- [PGF2001] Name (AS NNN) 7 A1 --- m_[PGF2001] [abcde] Multiplicity index on Name (in table3.dat only) 9- 10 I2 h RAh Right ascension (J2000) 12- 13 I2 min RAm Right ascension (J2000) 15- 18 F4.1 s RAs Right ascension (J2000) 20 A1 --- DE- Declinationn sign (J2000) 21- 22 I2 deg DEd Declination (J2000) 24- 25 I2 arcmin DEm Declination (J2000) 27- 28 I2 arcsec DEs Declination (J2000) 30- 32 I3 --- Nblue Number of blue stars belonging to the group 34- 36 I3 urad Size Size of the group (in µrad≃0.2arcsec) 38- 40 I3 pc Sizepc Size of the group (in pc) 42 A1 --- Note [*] * more detailed cross-identification given in table3.dat 43- 60 A18 --- Cross-ID Cross-identification (1)
Note (1): Arabic numbers correspond to H II regions (Deharveng et al., 1988A&AS...73..407D), [DCL88] NNNA in Simbad Roman numbers correspond to objects studied by Breysacher et al. (1997A&A...326..976B), [BAT97] R in Simbad
History: From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 10-Sep-2001
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