Результаты исследований: Вклад в журнал › Статья › Рецензирование
Результаты исследований: Вклад в журнал › Статья › Рецензирование
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TY - JOUR
T1 - Parameters of the spiral structure of the galaxy from data on δ Cephei stars
AU - Popova, M.
PY - 2006
Y1 - 2006
N2 - We determined the locations of Galactic spiral arm segments for various age groups from the available data on the positions, ages, radial velocities, and proper motions of 440 δ Cephei variables using a previously developed technique. We obtained such parameters of the Galactic spiral structure as the arm pitch angle, [Figure not available: see fulltext.], and the pattern speed, ΩP = 21.7 ± 2.8 km s-1 kpc-1, which are comparable to [Figure not available: see fulltext.] and ΩP = 20.4 ± 2.5 km s-1 kpc-1, respectively, determined previously from open star clusters. Based on the radial velocities and proper motions of the sample stars, we derived the rotation curve of the Galaxy for the range of Galactocentric distances approximately from 6 to 15 kpc. Using the pattern speed, we determined the positions of the corotation region and the inner and outer Lindblad resonances. We estimated the perturbation amplitudes of the Galactic velocity field, f R = -1.8 ± 2.5 km s-1 and f 0 = +4.0 ± 3.4 km s -1. © Pleiades Publishing, Inc., 2006.
AB - We determined the locations of Galactic spiral arm segments for various age groups from the available data on the positions, ages, radial velocities, and proper motions of 440 δ Cephei variables using a previously developed technique. We obtained such parameters of the Galactic spiral structure as the arm pitch angle, [Figure not available: see fulltext.], and the pattern speed, ΩP = 21.7 ± 2.8 km s-1 kpc-1, which are comparable to [Figure not available: see fulltext.] and ΩP = 20.4 ± 2.5 km s-1 kpc-1, respectively, determined previously from open star clusters. Based on the radial velocities and proper motions of the sample stars, we derived the rotation curve of the Galaxy for the range of Galactocentric distances approximately from 6 to 15 kpc. Using the pattern speed, we determined the positions of the corotation region and the inner and outer Lindblad resonances. We estimated the perturbation amplitudes of the Galactic velocity field, f R = -1.8 ± 2.5 km s-1 and f 0 = +4.0 ± 3.4 km s -1. © Pleiades Publishing, Inc., 2006.
UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=000238679600005
UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=33645749024
U2 - 10.1134/S1063773706040049
DO - 10.1134/S1063773706040049
M3 - Article
VL - 32
SP - 244
EP - 251
JO - Astronomy Letters
JF - Astronomy Letters
SN - 1063-7737
IS - 4
ER -
ID: 42304268