GHASP: an H α kinematical survey of spiral galaxies – XIII. Distribution of luminous and dark matter in spiral and irregular nearby galaxies using H α and H i rotation curves and WISE photometry
GHASP: an H α kinematical survey of spiral galaxies – XIII. Distribution of luminous and dark matter in spiral and irregular nearby galaxies using H α and H i rotation curves and WISE photometry
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GHASP：螺旋星系的 H α 运动学调查 – XIII 使用 H α 和 H i 旋转曲线和 WISE 光度测量在螺旋和不规则附近星系中发光和暗物质的分布
DOI：
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发表时间：
2019
影响因子：
4.8
通讯作者：
A. Sorgho
中科院分区：
文献类型：
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作者：
M. Korsaga;B. Épinat;P. Amram;C. Carignan;P. Adamczyk;A. Sorgho
利用高分辨率GHASP Fabry-Perot H α RCs和扩展的WHISP H α RCs结合3.4 $mu$m WISE光度法，采用混合旋转曲线（RCs）获得了31个螺旋形和不规则邻近星系的质量模型。目的是比较仅使用H α RCs和光半径内暗物质（DM）晕的性质，包括和排除中性气体成分的质量贡献，以及使用H i或混合RCs时的影响。伪等温（ISO）核心和Navarro-Frenk-White (NFW) cuspy DM晕剖面用于各种基准拟合程序。使用H α rc的质量模型包括或不包括H i气体成分，提供兼容的圆盘M/L。DM光晕与重子参数之间的相关性不依赖于RC。显然，拟合过程之间的差异大于不同数据集之间的差异。混合RCs和H α RCs导致ISO和NFW最佳拟合模型的M/L值较高，但与仅使用H α RCs相比，ISO光晕的中心密度较低，NFW光晕的浓度较高。作为参考，用混合rc推导出的质量模型参数与H i的一致性优于H α rc。ISO密度曲线比NFW曲线更适合RCs，特别是当使用H α或混合RCs时。使用各种数据集确定的光半径处的光晕质量是兼容的，即使它们倾向于与H α rc高估。因此，混合rc是研究光学半径内质量分布的理想方法。
We present the mass models of 31 spiral and irregular nearby galaxies obtained using hybrid rotation curves (RCs) combining high-resolution GHASP Fabry–Perot H α RCs and extended WHISP H i ones together with 3.4 $mu$m WISE photometry. The aim is to compare the dark matter (DM) halo properties within the optical radius using only H α RCs with the effect of including and excluding the mass contribution of the neutral gas component, and when using H i or hybrid RCs. Pseudo-isothermal (ISO) core and Navarro–Frenk–White (NFW) cuspy DM halo profiles are used with various fiducial fitting procedures. Mass models using H α RCs including or excluding the H i gas component provide compatible disc M/L. The correlations between DM halo and baryon parameters do not strongly depend on the RC. Clearly, the differences between the fitting procedures are larger than between the different data sets. Hybrid and H i RCs lead to higher M/L values for both ISO and NFW best-fitting models but lower central densities for ISO haloes and higher concentration for NFW haloes than when using H α RCs only. The agreement with the mass model parameters deduced using hybrid RCs, considered as a reference, is better for H i than for H α RCs. ISO density profiles better fit the RCs than the NFW ones, especially when using H α or hybrid RCs. Halo masses at the optical radius determined using the various data sets are compatible even if they tend to be overestimated with H α RCs. Hybrid RCs are thus ideal to study the mass distribution within the optical radius.
DOI：
10.1088/0004-637x/782/2/90
发表时间：
2014-01
期刊：
The Astrophysical Journal
影响因子：
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作者：
M. Cluver;M. Cluver;T. Jarrett;A. Hopkins;S. Driver;S. Driver;J. Liske;M. Gunawardhana;M. Gunawardhana;M. Gunawardhana;E. Taylor;A. Robotham;M. Alpaslan;I. Baldry;Michael J. I. Brown;J. Peacock;C. Popescu;R. Tuffs;A. Bauer;J. Bland-Hawthorn;M. Colless;B. Holwerda;M. Lara-López;K. Leschinski;Á. López-Sánchez;Á. López-Sánchez;P. Norberg;M. Owers;Lingyu Wang;S. Wilkins
通讯作者：
M. Cluver;M. Cluver;T. Jarrett;A. Hopkins;S. Driver;S. Driver;J. Liske;M. Gunawardhana;M. Gunawardhana;M. Gunawardhana;E. Taylor;A. Robotham;M. Alpaslan;I. Baldry;Michael J. I. Brown;J. Peacock;C. Popescu;R. Tuffs;A. Bauer;J. Bland-Hawthorn;M. Colless;B. Holwerda;M. Lara-López;K. Leschinski;Á. López-Sánchez;Á. López-Sánchez;P. Norberg;M. Owers;Lingyu Wang;S. Wilkins