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The Distance to NGC 2264

Baxter, Eric J. and Covey, Kevin R. and Muench, August A. and Fűrész, Gábor and Rebull, Luisa and Szentgyorgyi, Andrew H. (2009) The Distance to NGC 2264. Astronomical Journal, 138 (3). pp. 963-974. ISSN 0004-6256.

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We determine the distance to the open cluster NGC 2264 using a statistical analysis of cluster member inclinations. We derive distance-dependent values of sin i (where i is the inclination angle) for 97 stars in NGC 2264 from the rotation periods, luminosities, effective temperatures, and projected equatorial rotation velocities, v sin i, measured for these stars. We have measured 96 of the vsin i 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 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 913 pc. Quantitative tests of our analysis reveal uncertainties of 40 and 110 pc due to sampling and systematic effects, respectively. This distance estimate suggests a revised age for the cluster of ~1.5 Myr, although more detailed investigations of the full cluster membership are required to draw strong conclusions.

Item Type:Article
Related URLs:
URLURL TypeDescription
Covey, Kevin R.0000-0001-6914-7797
Rebull, Luisa0000-0001-6381-515X
Szentgyorgyi, Andrew H.0000-0002-0255-2525
Additional Information:© 2009. The American Astronomical Society. Received 2008 September 26; accepted 2009 July 1; published 2009 August 14. The authors thank Steve Strom for a prompt and helpful referee report that improved the analysis presented here, and Russel White and Javed Gabor for providing IDL code that formed the basis of our cross-correlation pipeline. E.J.B. acknowledges the support of the SAO Summer Intern Program, made possible by a grant from the NSF. NASA support was provided to K.R.C. for this work through the Spitzer Space Telescope Fellowship Program, through a contract issued by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. A.A.M. was supported by NASA through contract 1335523 issued by JPL/Caltech.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Subject Keywords:methods: statistical; open clusters and associations: individual (NGC 2264); stars: distances; stars: formation; stars: rotation
Issue or Number:3
Record Number:CaltechAUTHORS:20091002-143618439
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Official Citation:The Distance to NGC 2264 Eric J. Baxter, Kevin R. Covey, August A. Muench, Gábor Fűrész, Luisa Rebull, and Andrew H. Szentgyorgyi 2009 The Astronomical Journal 138 963-974 doi: 10.1088/0004-6256/138/3/963
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16174
Deposited By: Ruth Sustaita
Deposited On:06 Oct 2009 21:29
Last Modified:09 Mar 2020 13:19

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