论文标题

由二十年调查确定的M31中NovAE的速率和空间分布

The Rate and Spatial Distribution of Novae in M31 as Determined by a Twenty-Year Survey

论文作者

Rector, Travis A., Shafter, Allen W., Burris, William A., Walentosky, Matthew J., Viafore, Kendall D., Strom, Allison L., Cool, Richard J., Sola, Nicole A., Crayton, Hannah, Pilachowski, Catherine A., Jacoby, George H., Corbett, Danielle L., Rene, Michelle, Hernandez, Denise

论文摘要

基于研究的科学教育计划的一部分进行了一项长期(1995-2016)对附近仙女座银河系(M31)的Novae调查。在调查过程中,180晚观察在亚利桑那州的基特峰完成。总共发现或确认了262名NOVAE,其中40个没有以前没有报告。其中,203个Novae形成了由KPNO/Wiyn 0.9-m望远镜检测到的空间完整样品,内于$ 20' \ TIMES20'$ field以M31核的中心。额外的50名Novae是KPNO 4-M望远镜在较大$ 36'\ times36'$字段中检测到的空间完整样本的一部分。与以前的研究一致,发现两项调查中NOVAE的空间分布遵循M31的凸起光,比星系的整体背景光稍接近。在纠正了调查的限制幅度以及空间和时间覆盖之后,发现M31中的最终NOVA速率为$ R = 40^{+5} _ { - 4} $ yr $^{ - 1} $,这要低于最近的估计。当标准化为M31的$ K $ -Band光度时,此值会产生特定于特定的NOVA速率,$ν_k= 3.3 \ pm0.4 $ yr $^{ - 1} [10^{10} l _ {\ odot,k},k}]^{ - 1} $。通过使用M31的相对红外发光度和我们的Galaxy缩放M31 NOVA速率,可以找到$ R_ \ Mathrm {G} = 28^{+5} _ { - 4} $的Nova速率。

A long-term (1995-2016) survey for novae in the nearby Andromeda galaxy (M31) was conducted as part of the Research-Based Science Education initiative. During the course of the survey 180 nights of observation were completed at Kitt Peak, Arizona. A total of 262 novae were either discovered or confirmed, 40 of which have not been previously reported. Of these, 203 novae form a spatially-complete sample detected by the KPNO/WIYN 0.9-m telescope within a $20'\times20'$ field centered on the nucleus of M31. An additional 50 novae are part of a spatially-complete sample detected by the KPNO 4-m telescope within a larger $36'\times36'$ field. Consistent with previous studies, it is found that the spatial distribution of novae in both surveys follows the bulge light of M31 somewhat more closely than the overall background light of the galaxy. After correcting for the limiting magnitude and the spatial and temporal coverage of the surveys, a final nova rate in M31 is found to be $R=40^{+5}_{-4}$ yr$^{-1}$, which is considerably lower than recent estimates. When normalized to the $K$-band luminosity of M31, this value yields a luminosity-specific nova rate, $ν_K = 3.3\pm0.4$ yr$^{-1} [10^{10} L_{\odot,K}]^{-1}$. By scaling the M31 nova rate using the relative infrared luminosities of M31 and our Galaxy, a nova rate of $R_\mathrm{G}=28^{+5}_{-4}$ is found for the Milky Way.

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