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arXiv 2109.04992astro-ph.GA
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MIGHTEE-HI:过去十亿年的重子Tully-Fisher关系

MIGHTEE-HI: The baryonic Tully-Fisher relation over the last billion years

Anastasia A. Ponomareva, Wanga Mulaudzi, Natasha Maddox, Bradley S. Frank, Matt J. Jarvis, Enrico M. Di Teodoro, Marcin Glowacki, Renée C. Kraan-Korteweg, Tom A… 展开作者

Anastasia A. Ponomareva, Wanga Mulaudzi, Natasha Maddox, Bradley S. Frank, Matt J. Jarvis, Enrico M. Di Teodoro, Marcin Glowacki, Renée C. Kraan-Korteweg, Tom A. Oosterloo, Elizabeth A. K. Adams, Hengxing Pan, Isabella Prandoni, Sambatriniaina H. A. Rajohnson, Francesco Sinigaglia, Nathan J. Adams, Ian Heywood, Rebecca A. A. Bowler, Peter W. Hatfield, Jordan D. Collier, Srikrishna Sekhar

摘要:

利用MIGHTEE巡天早期科学数据中的67个星系样本,我们研究了基于HI的重子Tully-Fisher关系(bTFr),覆盖了10亿年的$\sim$($0 \leq z \leq 0.081 $)。我们认为bTFr基于两种不同的旋转速度的措施:全球HI配置文件和$\rm V_{out}$的宽度,测量作为最外层的旋转速度从解决HI旋转曲线。这两种关系都表现出与最佳拟合关系($σ_{\perp}=0.07\pm0.01$)正交的非常低的固有散射,与$z \simeq 0$处的重复样本相当。该关系的斜率相似且与$ z \simeq 0$研究一致(PDMATHAMT的$3.66^{+0.35}_{-0.29}$和$\rm V_{out}$的$3.47^{+0.37}_{-0.30}$)。我们没有发现bTFr在过去10亿年中演化的证据,并且我们样本中的所有星系都符合与红移和旋转速度测量无关的相同关系。我们的研究结果建立了一个参考所有未来的研究,基于HI的bTFr作为红移的函数,将进行与正在进行的深SKA探路者调查。

英文摘要:

Using a sample of 67 galaxies from the MIGHTEE Survey Early Science data we study the HI-based baryonic Tully-Fisher relation (bTFr), covering a period of $\sim$one billion years ($0 \leq z \leq 0.081 $). We consider the bTFr based on two different rotational velocity measures: the width of the global HI profile and $\rm V_{out}$, measured as the outermost rotational velocity from the resolved HI rotation curves. Both relations exhibit very low intrinsic scatter orthogonal to the best-fit relation ($σ_{\perp}=0.07\pm0.01$), comparable to the SPARC sample at $z \simeq 0$. The slopes of the relations are similar and consistent with the $ z \simeq 0$ studies ($3.66^{+0.35}_{-0.29}$ for $\rm W_{50}$ and $3.47^{+0.37}_{-0.30}$ for $\rm V_{out}$). We find no evidence that the bTFr has evolved over the last billion years, and all galaxies in our sample are consistent with the same relation independent of redshift and the rotational velocity measure. Our results set up a reference for all future studies of the HI-based bTFr as a function of redshift that will be conducted with the ongoing deep SKA pathfinders surveys.

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