3084B III/84B Galactic O Stars C Cruz-Gonzalez E Recillas-Cruz R Costero M Peimbert S Torres-Peimbert Rev. Mex. Astron. Astrof. 1 211 1974 1974RMxAA...1..211C Stars, O The catalog is a compilation of published data for 644 galactic O stars of luminosity V. The catalog is intended to be useful to O-type star observers by providing a reference list for general studies on O-type stars. The catalog includes cross identifications, equatorial and galactic coordinates, visual or photographic magnitudes, B-V, spectral types, distances to the stars, radial velocities, H II region identifications, remarks, and notes.

CGO CGO number Sequential number of the object in this catalog --- Ident Alternate ident --- RAh Right Ascension 1975.0 (hours) Equatorial coordinate for Equinox 1975.0 h RAm RA in minutes min DE- Sign of Declination 1975.0 --- DEd DEC degrees deg DEm DEC arcminutes arcmin GLONd Galactic longitude degrees Galactic coordinate (l II and b II) deg GLONm Galactic longitude arcminutes arcmin GLATsign Galactic latitude sign --- GLATd Galactic latitude degrees deg GLATm Galactic latitude arcminutes arcmin Mag magnitudes V in the UBV system where available, otherwise the photographic magnitude (see mag. quality index) mag q_Mag Mag. quality index Single-character code indicating the quality of the magnitude. The following codes are used: P The magnitude is photographic rather than visual. These stars will not have B-V listed. V The star is an intrinsic variable. M The star is one component of a close multiple system. The magnitude listed may be contaminated because of "the brightness of the companion (delta_m < 2) and its proximity (d < 10")." C A correction has been applied to allow for a companion. In these cases delta_m is given in the remarks following "SB" or "VB": The value given for delta_m is the magnitude difference between the O star and its companion, as given in the literature. The magnitude listed in the CGO corresponds to the observed visual intensity from which the intensity of the companion has been subtracted. ? The magnitude is not known. The magnitude field will be blank. --- B-V B-V magnitudes mag Sp Spectral type --- q_Sp Spec. type qual. ind. Spectral type quality index -- Single-character code indicating the quality of the spectral index. Cruz-Gonzlez et al. (1974) define the following codes for this field: H High quality. This is assigned only to spectral types from the following sources: Conti, P. S. 1973a, Astrophys. J., 179, 161. Conti, P. S. 1973b, Astrophys. J., 179, 181. Conti, P. S. 1974, Astrophys. J., 187, 539. Conti, P. S. and Alschuler, W. R. 1971, Astrophys. J., 170, 325. Humphreys, R. M. 1970, Astron. J., 75, 602. Humphreys, R. M. 1973, Astron. Astrophys. Suppl. Ser., 9, 85. Walborn, N. R. 1971, Astrophys. J. Suppl. Ser., 23, 257. Walborn, N. R. 1972, Astron. J., 77, 312. Walborn, N. R. 1973a, Astron. J., 78, 1067. Walborn, N. R. 1973b, Astrophys. J., 179, 517. M Medium quality. This index is assigned to spectral types determined by authors other than those listed above with at least two coincident spectra. L Low quality. This index is assigned to spectral types for which there is either only one determination, disagreement in the literature, or acknowledged doubts. N This index is assigned to spectral types for which there is either no luminosity class or widely different luminosity classes. --- D-star Distance to star Distance to the star in kiloparsecs. For stars in clusters this is just the distance to the cluster. For stars not in a cluster a distance was calculated using the photometric data and luminosity class where available, or the photographic magnitude and an assumed reddening of 1 mag/kpc. kpc q_D-star Distance qual. index Single-character code indicating the quality of the distance in bytes 75-80. This quality depends on the spectral type quality index, the magnitude quality index, and the method of distance determination (see Table below). Table. Magnitude Quality Index Definition Quality Spectral Magnitude Distances Index Index Index Determination A from cluster B H blank or C photometric C H V or M photometric D M blank or C photometric E M V or M photometric F L blank or C photometric G L V or M photometric H H P (Av = l mag/kpc) I L P (Av = 1 mag/kpc) J M P (Av = l mag/kpc) K N blank or C (lum. class V) L N V or M (lum. class V) Av = assumed normal reddening law, Av = 3E(B - V) Luminosity class V assumed for those stars with no published luminosity class --- D-Gal-P Distance to galactic plane Perpendicular distance from the star to the galactic plane in parsecs pc Vsun Hel. radial velocity Heliocentric radial velocity of the star in km/sec. See Cruz-Gonzalez et al. (1974) for a discussion of how this value was determined and the assignment of the corresponding quality index. km/s q_Vsun Hel. RV quality index Single-character code indicating the quality of the heliocentric radial velocity. The following codes are used: A Emax = 4 km/s B Emax = 6 km/s C Emax = 9 km/s D Emax = 20 km/s For spectroscopic binaries with known orbital elements, the quality index assigned is the same as that of Batten (1967). "In the very few cases where the quality according to Batten (1967) was 'E', which was changed to 'D' unless the orbit was a provisional one." --- VLSR Rad. vel. (LSR) Radial velocity of the star with respect to the local standard of rest (LSR), in km/sec. The heliocentric radial velocities ... of the start were reduced to the LSR assuming the solar motion obtained by Woolley, Epps, Penston, and Pocock (1970) for the local stars; namely, u = 10 km/s, v = 10 km/s, and w = 7 km/s (where u is directed toward the galactic center, v toward the direction of galactic rotation and w toward the northern galactic pole). km/s VLSRcom LSR rad. component "Radial component of the velocity of an object with respect to the LSR, at the same calculated position of the star, moving in the circular orbit defined by the galactic potential, vcr (in km/s)." km/s PVelrad Pecul. vel. rad. comp. Radial component of the peculiar velocity of the star, vpr = vLSR - vcr, in km/s km/s flag1 H II region flag "I" if the star is inside an H II region, "O" if it is outside --- H2Ident H II region ident. Identification of the H II region containing the star or of the H II region in the vicinity of the star. "MA" precedes the numbers of H II regions from the catalog of Marsalkova; "CYG" identifies stars found inside the Cygnus Nebula (S109 of Sharpless (1959). The number from Downes (1971) is listed in the notes for supernova remnants projected near the O star or H II region. --- D-H2 H II region distance Single-character code giving an approximate distance between a star and its associated H II region. The following codes are used: X phi < 0".5 Y 0".5 < phi < 1 deg Z phi > 1 deg pc GoyNum Goy (1973) number Number from the General Catalogue of O-Type Stars, Goy (1973) --- flag2 Note flag "*" if there is a note for this object in the second file --- rem Remark Miscellaneous remarks about the object. The following symbols appear: VVAR Velocity variable. The velocity range follows in parentheses. VVAR? Suspected velocity variable; little information available to determine variability VVAR(?) Suspected velocity variable; no single measurements given, variability stated without range SB ORB Single- or double-lined spectroscopic binary with known orbital elements. The magnitude difference follows in square brackets; the relative radial velocity is in parentheses. SB ORB? Spectroscopic binary with preliminary or provisional orbital elements. The magnitude difference follows in square brackets. SB Spectroscopic binary reported to have double lines. The magnitude difference follows in square brackets; the relative radial velocity is in parentheses. SB? Suspected double-line spectroscopic binary VB Visual binary corrected for contribution of bright, nearby component. The magnitude difference follows in brackets. EB Eclipsing binary. The depth of the primary eclipse in magnitudes follows in brackets. --- CGO CGO number Number of the object to which this note refers --- rem Note Text of the note. When bytes 1-3 arc blank this field continues the note from the previous record. --- C.-H. Joseph Lyu Hughes STX/NASA 1995Jun22 UNKNOWN UNKNOWN The Catalogue of Galactic O Stars (CGO) was received by the Astronomical Data Center (ADC), NASA Goddard Space Flight Center, from E. Recillas-Cruz and J. F. Barral of the Instituto de Astronomia, Universidad Nacional Autonoma de Mexico, in August 1982. The original tape consisted of two text files containing the main catalog data in the same format as the published catalog: the first file contained the data from the left-hand pages; the second file contained the data from the right-hand pages. A FORTRAN program was run to combine these two files into a single one. The spectral types were then converted from all upper-case to standard upper- and lower-case notation by means of an editor. ADC personnel keyed the notes from Cruz-Gonzalez et al. (1974) into a separate file. A FORTRAN program was run to check the validity of each field according to its data type and value. III_84B.xml