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J/AJ/138/963        Rotation of NGC 2264 members             (Baxter+, 2009)

The distance to NGC 2264. Baxter E.J., Covey K.R., Muench A.A., Furesz G., Rebull L., Szentgyorgyi A.H. <Astron. J., 138, 963-974 (2009)> =2009AJ....138..963B
ADC_Keywords: Clusters, open ; Rotational velocities ; Keywords: methods: statistical - open clusters and associations: individual (NGC 2264) - stars: distances - stars: formation - stars: rotation Abstract: We determine the distance to the open cluster NGC 2264 using a statistical analysis of cluster member inclinations. We derive distance-dependent values of sini (where i is the inclination angle) for 97 stars in NGC 2264 from the rotation periods, luminosities, effective temperatures, and projected equatorial rotation velocities, vsini, measured for these stars. We have measured 96 of the vsini values in our sample by analyzing high-resolution spectra with a cross-correlation technique. We model the observed distribution of sin i for the cluster by assuming that member stars have random axial orientations and by adopting prescriptions for the measurement errors in our sample. By adjusting the distance assumed in the observed sini distribution until it matches the modeled distribution, we obtain a best-fit distance for the cluster. We find the data to be consistent with a distance to NGC 2264 of 913pc. Description: Spectra for 923 stars in and around NGC 2264 were obtained from the sample observed by Furesz et al. (2006, Cat. J/ApJ/648/1090) using Hectochelle, a multiobject echelle spectrograph located on the 6.5m Multiple Mirror Telescope (MMT). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 55 97 Data used to create sini distribution
See also: J/ApJ/648/1090 : Radial velocities of NGC 2264 stars (Furesz+, 2006) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 11 F11.7 deg RAdeg Right ascension in decimal degrees (J2000) 13- 22 F10.7 deg DEdeg Declination in decimal degrees (J2000) 24- 29 F6.3 [10-7W] logLbol Bolometric luminosity (erg/s) 31- 35 F5.3 [K] logTeff Effective temperature 37 A1 --- Ref [SP] Lbol and Teff source (1) 39- 43 F5.2 d Per Rotation period 46- 49 F4.1 km/s vsini Projected rotational velocity 51- 55 F5.2 km/s e_vsini rms uncertainty on vsini
Note (1): Type of reddening correction applied to each star's photometry in estimating its luminosity and temperature: * stars with an "S" have individual reddening estimates based on observed spectral types, while * stars labeled "P" had photometry corrected assuming the modal extinction derived for cluster members by Rebull et al. (2006AJ....131.2934R).
Nomenclature Notes: Source identified as [BCM2009] DDD.ddddddd+DD.ddddddd in Simbad. History: From electronic version of the journal
(End) Patricia Vannier [CDS] 17-Jan-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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