arXiv 1109.32072011-09astro-ph.IMastro-ph.GA

GalMass：一个智能手机应用程序估计银河质量

GalMass: A Smartphone Application for Estimating Galaxy Masses

Kyle R. Stewart

备注：: Revision fixed a crucial typo in one of the fitting function parameters in Table 1 (0.740 -> 10.740). IDL code duplicating the provided fitting function conversions between Mhalo, Mstar, Mgas is available at http://krstewart.com/galmass/galmass.pro

摘要：

本说明记录了已在Android Market上发布的智能手机应用程序“GalMass”所使用的方法。GalMass估算了中心星系的晕维里质量（Mvir）、恒星质量（Mstar）、气体质量（Mgas）和星系气体分数作为红移（z<2）的函数，上述质量中的任何一个作为输入参数。为了在Mvir和Mstar之间进行转换（在任一方向上），GalMass使用拟合函数来近似Conroy & Wechsler（2009），Moster et al.（2010）或Behroozi et al.（2010）的丰度匹配模型。GalMass使用半经验拟合来观察星系气体分数，以在Mstar和Mgas之间进行转换，如Stewart et al.（2009）所述。

英文摘要：

This note documents the methods used by the smartphone application, "GalMass," which has been released on the Android Market. GalMass estimates the halo virial mass (Mvir), stellar mass (Mstar), gas mass (Mgas), and galaxy gas fraction of a central galaxy as a function of redshift (z<2), with any one of the above masses as an input parameter. In order to convert between Mvir and Mstar (in either direction), GalMass uses fitting functions that approximate the abundance matching models of either Conroy & Wechsler (2009), Moster et al. (2010), or Behroozi et al. (2010). GalMass uses a a semi-empirical fit to observed galaxy gas fractions to convert between Mstar and Mgas, as outlined in Stewart et al. (2009).

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。