Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12104/40738
Title: Distance determination to PNe using the extinction-distance method
Author: Navarro, S.G.
Corradi, R.L.M.
Mampaso, A.
Issue Date: 2011
Abstract: We present individual distances to three PNe: NGC 6537, NGC 6781 and NGC 7027, determined by the extinction-distance method. These objects are part of a larger sample (35) of PNe that we observed at ORM. In order to apply this method, and to obtain accurate distances, we determined the spectral type of 40 to 60 stars in the line of sight of each PNe. This implied the necessity of classifying few thousands of stellar spectra with S/N ratio between 10 and 60. To solve such need we developed an ANN system to perform automatic spectral classification which could classify spectra with S/N ratio as low as 20 with an accuracy better than 2 spectral subtypes. In this poster we compare the accuracy of such distances with previous distance determinations using other methods. We conclude that it is possible to use this method to obtain the distance of a large number of PNe with better precision. � 2012 International Astronomical Union.
URI: http://www.scopus.com/inward/record.url?eid=2-s2.0-84865711627&partnerID=40&md5=b287d1ab1d7451ebc7fbd3d853de0b9c
http://hdl.handle.net/20.500.12104/40738
Appears in Collections:Producción científica UdeG

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