论文标题
$ω_ {\ rm bar} $在NGC 5597中，来自VLA HI 21厘米观测值
$Ω_{\rm bar}$ in NGC 5597 from VLA HI 21 cm Observations
论文作者
论文摘要
我们报告了非常大的阵列B构型观测值，该观测值是原子氢21 cm线的发射，从禁止的磁盘Galaxy NGC 5597以7.1“ x 4.2”的角度分辨率为单位。使用共振方法，并假设恒星条的旋律半径与半轴轴的比率是统一的（$ \ \ \ \ \ \ \ \ \ artcal {r} \ equiv r _ {\ rm cr}/a _ {\ rm bar} = 1 $），我们估计bar bar y Martel bar and the the the and the the the and the the Angulate bar} $ bar。 \ sim 15.3 $ km s $^{ - 1} $ kpc $^{ - 1} $。 $ω_ {\ rm bar} $的恒定值交叉$ω_ {\ rm Gas} +κ（r）/4 $在距离$ \ sim 6.73 $ kpc时，这将对应于外部M = 4共振的北螺旋结构的空间位置。 $ω_ {\ rm bar} $的该值类似于在附近的其他明亮的禁止的星系中估计的值，这些星系表现出透明环（附近ILR）或外环（OLR附近）。
We report Very Large Array B-configuration observations of the atomic hydrogen 21 cm line emission from the barred disk galaxy NGC 5597 at an angular resolution of 7.1" x 4.2". Using the resonance method, and assuming the ratio of the corotation radius to the semi-major axis of the stellar bar is unity ($\mathcal{R} \equiv R_{\rm CR}/a_{\rm bar} = 1$), we estimate the angular pattern speed of the stellar bar to be, $Ω_{\rm bar} \sim 15.3$ km s$^{-1}$ kpc$^{-1}$. This constant value for $Ω_{\rm bar}$ crosses $Ω_{\rm gas} + κ(R)/4$ at a distance $\sim 6.73$ kpc which would correspond to the spatial location of the north spiral structure near an outer m=4 resonance. This value of $Ω_{\rm bar}$ is similar to the values estimated for other bright nearby barred galaxies that exhibit circumnuclear rings (near ILR) or outer rings (near OLR).
