A new, purely photometric method for determination of resonance locations in spiral galaxies

Q1 Earth and Planetary Sciences

Monthly Notices of the Royal Astronomical Society: Letters Pub Date : 2023-10-01 DOI:10.1093/mnrasl/slad141

Alexander A Marchuk, Aleksandr V Mosenkov, Ilia V Chugunov, Valeria S Kostiuk, Maria N Skryabina, Vladimir P Reshetnikov

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Abstract

ABSTRACT The knowledge of the positions of the corotation resonance in spiral arms is a key way to estimate their pattern speed, which is a fundamental parameter determining the galaxy dynamics. Various methods for its estimation have been developed, but they all demonstrate certain limitations and a lack of agreement with each other. Here, we present a new method for estimating the corotation radius. This method takes into account the shape of the profile across the arm and its width and, thus, only photometric data is needed. The significance of the method is that it can potentially be used for the farthest galaxies with measurable spiral arms. We apply it to a sample of local galaxies from Savchenko et al.(2020) and compare the obtained corotation radii with those previously measured in the literature by other methods. Our results are in good agreement with the literature. We also apply the new method to distant galaxies from the COSMOS field. For the first time, corotation locations for galaxies with photometric redshifts up to z ∼ 0.9 are measured.

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确定螺旋星系共振位置的一种新的纯光度法

旋臂中旋向共振的位置是估计旋臂模式速度的关键，而模式速度是决定星系动力学的基本参数。目前已经开发了各种估算方法，但它们都有一定的局限性，并且彼此之间缺乏一致性。在此，我们提出了一种估计旋转半径的新方法。该方法考虑了臂侧轮廓的形状及其宽度，因此只需要光度数据。该方法的意义在于，它可以潜在地用于具有可测量旋臂的最远星系。我们将其应用于Savchenko et al.(2020)的本地星系样本，并将获得的旋转半径与文献中先前通过其他方法测量的半径进行比较。我们的结果与文献很好地吻合。我们还将新方法应用于来自COSMOS场的遥远星系。第一次测量了光度红移达到z ~ 0.9的星系的旋转位置。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Monthly Notices of the Royal Astronomical Society: Letters Earth and Planetary Sciences-Space and Planetary Science

CiteScore

8.80

自引率

0.00%

发文量

136

期刊介绍： For papers that merit urgent publication, MNRAS Letters, the online section of Monthly Notices of the Royal Astronomical Society, publishes short, topical and significant research in all fields of astronomy. Letters should be self-contained and describe the results of an original study whose rapid publication might be expected to have a significant influence on the subsequent development of research in the associated subject area. The 5-page limit must be respected. Authors are required to state their reasons for seeking publication in the form of a Letter when submitting their manuscript.