Towards the prediction of molecular parameters from astronomical emission lines using Neural Networks
Towards the prediction of molecular parameters from astronomical emission lines using Neural Networks
复制标题
使用神经网络预测天文发射线的分子参数
DOI:
10.1007/s10686-021-09786-w
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发表时间:
2021
影响因子:
3
通讯作者:
Aladro Re
中科院分区:
文献类型:
--
作者:
Barrientos Alejandro;Holdship Jonathan;Solar Mauricio;Martin Sergio;Rivilla Victor M.;Viti Serena;Mangum Jeff;Harada Nanase;Sakamoto Kazushi;Muller Sebastien;Tanaka Kunihiko;Yoshimura Yuki;Nakanishi Kouichiro;Herrero-Illana Ruben;Muehle Stefanie;Aladro Re
Molecular astronomy is a field that is blooming in the era of large observatories such as the Atacama Large Millimeter/Submillimeter Array (ALMA). With modern, sensitive, and high spectral resolution radio telescopes like ALMA and the Square Kilometer Array, the size of the data cubes is rapidly escalating, generating a need for powerful automatic analysis tools. This work introducesMolPred, a pilot study to perform predictions of molecular parameters such as excitation temperature (Tex) and column density (log(N)) from input spectra by the use of neural networks. We used as test cases the spectra of CO, HCO+, SiO and CH3CN between 80 and 400 GHz. Training spectra were generated with MADCUBA, a state-of-the-art spectral analysis tool. Our algorithm was designed to allow the generation of predictions for multiple molecules in parallel. Using neural networks, we can predict the column density and excitation temperature of these molecules with a mean absolute error of 8.5% for CO, 4.1% for HCO+, 1.5% for SiO and 1.6% for CH3CN. The prediction accuracy depends on the noise level, line saturation, and number of transitions. We performed predictions upon real ALMA data. The values predicted by our neural network for this real data differ by 13% from the MADCUBA values on average. Current limitations of our tool include not considering linewidth, source size, multiple velocity components, and line blending.
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影响因子:
22.7
作者:
G. B. Berriman;S. Groom
通讯作者:
S. Groom
DOI:
10.1117/12.2232436
发表时间:
2016
期刊:
--
影响因子:
--
作者:
Michael Mach;R. Köhler;O. Czoske;K. Leschinski;W. Zeilinger;W. Kausch;T. Ratzka;M. Leitzinger;R. Greimel;N. Przybilla;V. Schaffenroth;M. Güdel;B. Brandl
通讯作者:
B. Brandl
DOI:
--
发表时间:
2015
期刊:
--
影响因子:
--
作者:
C. Vastel;S. Bottinelli;E. Caux;J. Glorian;M. Boiziot
通讯作者:
M. Boiziot
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
J. Lightfoot;F. Wyrowski;D. Muders;F. Boone
通讯作者:
F. Boone