Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.5833b&link_type=abstract
American Astronomical Society, AAS Meeting #211, #58.33; Bulletin of the American Astronomical Society, Vol. 39, p.839
Astronomy and Astrophysics
Astronomy
Scientific paper
We measure the distance to the galactic cluster NGC 2264 using a statistical technique comparing the observed distribution of projected stellar inclination angles to a modeled distribution. We derive distance-dependent values of sin i (where i is the inclination of the stellar rotation axis to the line of sight) for 131 stars in NGC 2264 from the rotation periods, luminosities, effective temperatures, and projected equatorial rotation velocities, v sin i, of these stars. 130 of the v sin i values in our sample were calculated by analyzing high-resolution spectra using 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 sin i 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 873±45; pc.
Baxter Eric
Covey Kevin R.
Muench August A.
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