Title: GalMod: a Galactic synthesis population model Show Chinese title

Title: GalMod：银河系合成种群模型

Abstract: We present a new Galaxy population synthesis Model (GalMod). GalMod is a star-count model featuring an asymmetric bar/bulge as well as spiral arms and related extinction. The model, initially introduced in Pasetto et al. (2016b), has been here completed with a central bar, a new bulge description, new disk vertical profiles and several new bolometric corrections. The model can generate synthetic mock catalogs of visible portions of the Milky Way (MW), external galaxies like M31, or N-body simulation initial conditions. At any given time, e.g., a chosen age of the Galaxy, the model contains a sum of discrete stellar populations, namely bulge/bar, disk, halo. These populations are in turn the sum of different components: the disk is the sum of spiral arms, thin disks, a thick disk, and various gas components, while the halo is the sum of a stellar component, a hot coronal gas, and a dark matter component. The Galactic potential is computed from these population density profiles and used to generate detailed kinematics by considering up to the first four moments of the collisionless Boltzmann equation. The same density profiles are then used to define the observed color-magnitude diagrams in a user-defined field of view from an arbitrary solar location. Several photometric systems have been included and made available on-line and no limits on the size of the field of view are imposed thus allowing full sky simulations, too. Finally, we model the extinction adopting a dust model with advanced ray-tracing solutions. The model's web page (and tutorial) can be accessed at www.GalMod.org. Show Chinese abstract

Abstract: 我们提出了一种新的星系人口合成模型（GalMod）。 GalMod 是一种星计数模型，具有不对称的棒/核球，以及旋臂和相关的消光。 该模型最初在 Pasetto 等人（2016b）中介绍，此处已补充了中心棒、新的核球描述、新的盘垂直剖面和多种新的光度校正。 该模型可以生成可见部分银河系（MW）、类似 M31 的外部星系或 N 体模拟初始条件的合成模拟目录。 在任何给定时间，例如银河系选定的年龄，该模型包含离散恒星种群的总和，即核球/棒、盘、晕。 这些种群本身是不同组件的总和：盘是旋臂、薄盘、厚盘和各种气体成分的总和，而晕是恒星成分、热冕状气体和暗物质成分的总和。 银河势能从这些种群密度剖面计算得出，并通过考虑无碰撞玻尔兹曼方程的前四个矩来生成详细的运动学。 然后使用相同的密度剖面，在用户定义的视场内从任意太阳位置定义观测到的颜色-星等图。 已包含并在线提供了几种测光系统，对视场大小没有限制，从而允许全天空模拟。 最后，我们采用具有先进光线追踪解决方案的尘埃模型来模拟消光。 该模型的网页（和教程）可访问 www.GalMod.org。