GHASP: an Hα kinematic survey of spiral and irregular galaxies – IX. The near‐infrared, stellar and baryonic Tully–Fisher relations★
GHASP: an Hα kinematic survey of spiral and irregular galaxies – IX. The near‐infrared, stellar and baryonic Tully–Fisher relations★
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GHASP：螺旋星系和不规则星系的 Hα 运动学调查 – 近红外、恒星和重子塔利-费舍尔关系★
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发表时间：
2011
期刊：
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通讯作者：
C. Oliveira
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作者：
S. Torres;S. Torres;B. Épinat;B. Épinat;P. Amram;H. Plana;C. Oliveira
我们首次研究了取自均质法布里-珀罗星系样本的场星系样本的近红外、恒星和重子塔利-费希尔关系[Gassendi HAlpha 螺旋巡天 (GHASP) 巡天]。与其他样本相比，GHASP 的主要优点是最大旋转速度是根据二维速度场估计的，避免了对星系的倾角和位置角的假设。通过将这些数据与 2MASS 光度测定、光学颜色、HI 质量和不同的质光比估计器相结合，我们发现恒星和重子 Tully-Fisher 关系的斜率分别为 4.48 +/- 0.38 和 3.64 +/- 0.28。我们发现，当使用不同的质光比配方时，这些值不会发生显着变化。我们还首次指出，上升的旋转曲线以及不对称的旋转曲线在塔利-费舍尔关系中比平坦的或对称的旋转曲线显示出更大的离散度。利用星系的重子质量和光学半径，我们发现该样本的所有星系的表面重子质量密度几乎恒定。在这项研究中，我们还强调近红外塔利-费舍尔关系在M-H、M-K处存在类似于-20的断裂，并且我们证实晚型星系比早型螺旋星系呈现出更高的总重子质量比，这表明超新星反馈实际上是晚型螺旋中的一个重要问题。由于明确的样本选择标准和数据分析的同质性，GHASP星系的Tully-Fisher关系可以作为研究其他环境和较高红移下这种关系的参考。
We studied, for the first time, the near-infrared, stellar and baryonic Tully-Fisher relations for a sample of field galaxies taken from a homogeneous Fabry-Perot sample of galaxies [the Gassendi HAlpha survey of SPirals (GHASP) survey]. The main advantage of GHASP over other samples is that the maximum rotational velocities were estimated from 2D velocity fields, avoiding assumptions about the inclination and position angle of the galaxies. By combining these data with 2MASS photometry, optical colours, HI masses and different mass-to-light ratio estimators, we found a slope of 4.48 +/- 0.38 and 3.64 +/- 0.28 for the stellar and baryonic Tully-Fisher relation, respectively. We found that these values do not change significantly when different mass-to-light ratio recipes were used. We also point out, for the first time, that the rising rotation curves as well as asymmetric rotation curves show a larger dispersion in the Tully-Fisher relation than the flat ones or the symmetric ones. Using the baryonic mass and the optical radius of galaxies, we found that the surface baryonic mass density is almost constant for all the galaxies of this sample. In this study we also emphasize the presence of a break in the NIR Tully-Fisher relation at M-H,M-K similar to -20 and we confirm that late-type galaxies present higher total-to-baryonic mass ratios than early-type spirals, suggesting that supernova feedback is actually an important issue in late-type spirals. Due to the well-defined sample selection criteria and the homogeneity of the data analysis, the Tully-Fisher relation for GHASP galaxies can be used as a reference for the study of this relation in other environments and at higher redshifts.