61
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Estimation of Absolute Magnitude-dependent Galactic Model Parameters In Intermediate Latitude With SDSS and SCUSS

      Preprint

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Based on SDSS and South Galactic Cap of u-band Sky Survey (SCUSS) early data, we use star counts method to estimate the Galactic structure parameters in an intermediate latitude with 10,180 main-sequence (MS) stars in absolute magnitude interval of \(4 \leq M_r \leq 13\). We divide the absolute magnitude into five intervals:\(4 \leq M_r < 5\), \(5 \leq M_r < 6\), \(6 \leq M_r < 8\), \(8 \leq M_r < 10\), \(10 \leq M_r \leq 13\), and estimate the Galactic structure parameters in each absolute magnitude interval to explore their possible variation with the absolute magnitude. Our study shows the parameters depend on absolute magnitude. For the thin disk, the intrinsic faint MS stars have large local space density and they tend to stay close to the Galactic plane. A plausible explanation is that faint MS stars with long lifetime experience long gravitational interaction time result in a short scaleheight. However, for the thick disk, the parameters show a complex trend with absolute magnitude, which may imply the complicated original of the thick disk. For the halo, the intrinsic faint MS stars have large local density and small axial ratio, which indicate a flattened inner halo and a more spherical outer halo.

          Related collections

          Author and article information

          Journal
          14 March 2014
          Article
          10.1093/mnras/stu469
          1403.3490
          02649dc3-9a74-4758-9a6f-b09a5fe17848

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

          History
          Custom metadata
          10 pages, 5 figures, Accepted for publication in MNRAS
          astro-ph.GA

          Comments

          Comment on this article