TY - JOUR

T1 - A new, purely photometric method for determination of resonance locations in spiral galaxies

AU - Марчук, Александр Александрович

AU - Мосенков, Александр Владимирович

AU - Чугунов, Илья Владимирович

AU - Костюк, Валерия Сергеевна

AU - Скрябина, Мария Николаевна

AU - Решетников, Владимир Петрович

PY - 2024/1/1

Y1 - 2024/1/1

N2 - 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.

AB - 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.

KW - galaxies: fundamental parameters

KW - galaxies: kinematics and dynamics

KW - galaxies: spiral

KW - galaxies: structure

UR - https://www.mendeley.com/catalogue/ec5e6d01-ef71-3112-8b6e-2446979e8313/

U2 - 10.1093/mnrasl/slad141

DO - 10.1093/mnrasl/slad141

M3 - Article

VL - 527

SP - L66–L70

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 1

ER -