A new catalogue of Galactic novae: investigation of the MMRD relation and spatial distribution
A new catalogue of Galactic novae: investigation of the MMRD relation and spatial distribution
复制标题
银河新星的新目录：MMRD关系和空间分布的研究
DOI：
10.1093/mnras/sty432
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发表时间：
2018
影响因子：
4.8
通讯作者：
T. Ak
中科院分区：
文献类型：
--
作者：
A. Ozdonmez;E. Ege;T. Guver;T. Ak
在这项研究中，一个新的银河系新星目录，收集这些源的重要参数，如它们的光变曲线参数，分类，H$\alpha$线的半高宽（FWHM），距离和星际红化的估计。该目录还公布在一个网站上，可通过SQL查询进行搜索，并提供一个在线工具，根据所得出的红化距离关系重新计算新星的距离/红化。利用星表中的新星，研究了银河系中最大星等-衰减率（MMRD）关系的存在性。虽然获得了MMRD关系，但在所得MMRD分布中仍然存在显著的散射。我们认为，MMRD关系可能取决于其他参数，除了下降时间，作为半高宽H$\alpha$，光变曲线的形状。使用两个不同的样本取决于在目录中的距离，并从派生MMRD关系，银河新星的空间分布作为其光谱和速度类的函数进行了研究。对银河系模型参数的研究表明，在标度高度为148和175 pc的情况下，局部爆发密度的最佳估计值分别为3.6和4.2 × 10 - 10 pc-3 yr，而空间密度的变化范围为0.4 - 16 × 10 - 6 pc-3 yr。根据观测到的局部爆发密度和尺度高度推断，银河系的盘新星爆发率在20 ~ 100年之间，平均为67 ~ 17年。
In this study, a new Galactic novae catalogue is introduced collecting important parameters of these sources such as their light curve parameters, classifications, full width half maximum (FWHM) of H$_\alpha$ line, distances and interstellar reddening estimates. The catalogue is also published on a website with a search option via a SQL query and an online tool to re-calculate the distance/reddening of a nova from the derived reddening-distance relations. Using the novae in the catalogue, the existence of a maximum magnitude-rate of decline (MMRD) relation in the Galaxy is investigated. Although an MMRD relation was obtained, a significant scattering in the resulting MMRD distribution still exists. We suggest that the MMRD relation likely depends on other parameters in addition to the decline time, as FWHM H$_\alpha$, the light curve shapes. Using two different samples depending on the distances in the catalogue and from the derived MMRD relation, the spatial distributions of Galactic novae as a function of their spectral and speed classes were studied. The investigation on the Galactic model parameters implies that best estimates for the local outburst density are 3.6 and 4.2 $\times 10^{-10}$ pc$^{-3}$ yr$^{-1}$ with a scale height of 148 and 175 pc, while the space density changes in the range of $0.4 - 16 \ \times 10^{-6}$ pc$^{-3}$. The local outburst density and scale height obtained in this study infer that the disk nova rate in the Galaxy is in the range of $\sim20$ to $\sim100$ yr$^{-1}$ with an average estimate $67^{+21}_{-17}$ yr$^{-1}$.
影响因子：
4.8
作者：
J. Binney;B. Burnett;G. Kordopatis;P. McMillan;Sanjib Sharma;T. Zwitter;O. Bienaymé;J. Bland-Hawthorn-J.
通讯作者：
J. Binney;B. Burnett;G. Kordopatis;P. McMillan;Sanjib Sharma;T. Zwitter;O. Bienaymé;J. Bland-Hawthorn-J.