Research output: Contribution to journal › Article › peer-review
On estimation of the pitch angle for spiral arms of galaxies. / Savchenko, Sergey.
In: Astrophysical Bulletin, Vol. 67, No. 3, 2012, p. 310-317.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - On estimation of the pitch angle for spiral arms of galaxies
AU - Savchenko, Sergey
PY - 2012
Y1 - 2012
N2 - The shape of the arms of spiral galaxies is usually described by logarithmic spiralswith constant pitch angles, however, some galaxies display variations of the pitch angle along their spiral arms. We propose a method of determining the pitch angle of the arms in spiral galaxies based on the window Fourier analysis of their images. This method allows us not only to infer the average pitch angle, but also to obtain its value as a function of galactocentric radius. The method is implemented in the form of freely available programs.
AB - The shape of the arms of spiral galaxies is usually described by logarithmic spiralswith constant pitch angles, however, some galaxies display variations of the pitch angle along their spiral arms. We propose a method of determining the pitch angle of the arms in spiral galaxies based on the window Fourier analysis of their images. This method allows us not only to infer the average pitch angle, but also to obtain its value as a function of galactocentric radius. The method is implemented in the form of freely available programs.
KW - galaxies: spiral
KW - galaxies: structure
U2 - 10.1134/S1990341312030078
DO - 10.1134/S1990341312030078
M3 - Article
VL - 67
SP - 310
EP - 317
JO - Astrophysical Bulletin
JF - Astrophysical Bulletin
SN - 1990-3413
IS - 3
ER -
ID: 5488089