论文标题
到窄线Seyfert 1 Galaxy NGC 4051的距离
The Cepheid Distance to the Narrow-Line Seyfert 1 Galaxy NGC 4051
论文作者
论文摘要
我们将$ d = 16.6 \ pm 0.3 $ 〜mpc（$μ= 31.10 \ pm0.04 $ 〜mag）得出，基于头孢虫时期的lumuminients和新的Hubble Space Telescope Multiband Imband Imageing。我们使用精确的变量的子样本（分别在光学和近红外子样本中）识别419个cepheid候选候选物，并估计光学和近红外波长的距离（分别为123和47）。我们将独立的光度法和距离估计方法与SH0ES团队使用的光度法和距离估计方法进行了比较，并找到了与0.01〜MAG的一致性。我们获得的距离建议NGC 4051的Eddington比率$ \ dot {m} \约0.2 $，这是狭窄的线seyfert 1星系的典型代表，这与先前距离估计所暗示的看似为odd值不同。对于NGC 4051，我们得出了$ -490 \ pm34 $ 〜km〜s $^{ - 1} $的特殊速度，与其居住的Ursa主要集群的整体运动一致。我们还重新审视了NGC 4051核的能量学，包括其流出率和质量吸积率。
We derive a distance of $D = 16.6 \pm 0.3$~Mpc ($μ=31.10\pm0.04$~mag) to the archetypal narrow-line Seyfert 1 galaxy NGC 4051 based on Cepheid Period--Luminosity relations and new Hubble Space Telescope multiband imaging. We identify 419 Cepheid candidates and estimate the distance at both optical and near-infrared wavelengths using subsamples of precisely-photometered variables (123 and 47 in the optical and near-infrared subsamples, respectively). We compare our independent photometric procedures and distance-estimation methods to those used by the SH0ES team and find agreement to 0.01~mag. The distance we obtain suggests an Eddington ratio $\dot{m} \approx 0.2$ for NGC 4051, typical of narrow-line Seyfert 1 galaxies, unlike the seemingly-odd value implied by previous distance estimates. We derive a peculiar velocity of $-490\pm34$~km~s$^{-1}$ for NGC 4051, consistent with the overall motion of the Ursa Major Cluster in which it resides. We also revisit the energetics of the NGC 4051 nucleus, including its outflow and mass accretion rates.
