Haverford College Haverford Scholarship Faculty Publications Astronomy 2013 Mapping the Local Halo: Statistical Parallax Analysis of SDSS Low-Mass Subdwarfs John J. Bochanski Haverford College,
[email protected] Follow this and additional works at: https://scholarship.haverford.edu/astronomy_facpubs Repository Citation "Mapping the Local Halo: Statistical Parallax Analysis of SDSS Low-Mass Subdwarfs." The Astronomical Journal 145 This Journal Article is brought to you for free and open access by the Astronomy at Haverford Scholarship. It has been accepted for inclusion in Faculty Publications by an authorized administrator of Haverford Scholarship. For more information, please contact
[email protected]. The Astronomical Journal, 145:40 (10pp), 2013 February doi:10.1088/0004-6256/145/2/40 C 2013. The American Astronomical Society. All rights reserved. Printed in the U.S.A. MAPPING THE LOCAL HALO: STATISTICAL PARALLAX ANALYSIS OF SDSS LOW-MASS SUBDWARFS John J. Bochanski1,2, Antonia Savcheva3,4, Andrew A. West3, and Suzanne L. Hawley5 1 Haverford College, 370 Lancaster Ave., Haverford, PA 19041, USA;
[email protected] 2 Astronomy and Astrophysics Department, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802, USA 3 Department of Astronomy, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA 4 Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA 5 Astronomy Department, University of Washington, Box 351580, Seattle, WA 98195, USA Received 2012 September 24; accepted 2012 November 23; published 2013 January 11 ABSTRACT We present a statistical parallax study of nearly 2000 M subdwarfs with photometry and spectroscopy from the Sloan Digital Sky Survey (SDSS). Statistical parallax analysis yields the mean absolute magnitudes, mean velocities, and velocity ellipsoids for homogenous samples of stars.