NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-26 T11:11:57 PDT
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For refcode 2008MNRAS.384.1045K:
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NED Abstract

Copyright by Royal Astronomical Society. 2008MNRAS.384.1045K Spectroscopy of two PN candidates in IC 10 A. Y. Kniazev, S. A. Pustilnik and D. B. Zucker Abstract. We present the results of the first spectroscopic observations of two planetary nebula (PN) candidates in the Local Group dwarf irregular galaxy IC 10. Using several spectral classification diagrams, we show that the brightest PN candidate (PN 7) is not a PN, but rather a compact H II region consisting of two components with low electron number densities. After the rejection of this PN candidate, the IC 10 PN luminosity function cut-off becomes very close to the standard value. With the compiled spectroscopic data for a large number of extragalactic PNe, we analyse a series of diagnostic diagrams to generate quantitative criteria for separating PNe from unresolved H II regions. We show that, with the help of the diagnostic diagrams and the derived set of criteria, PNe can be distinguished from H II regions with an efficiency of ~99.6 per cent. With the obtained spectroscopic data, we confirm that another, 1.7 mag fainter PN candidate (PN 9) is a genuine PN. We argue that, based on all currently available PNe data, IC 10 is located at a distance of 725^+63^_-33_ kpc [distance modulus (m - M) = 24.30^+0.18^_-0.10_]. Key words: planetary nebulae: general, galaxies: evolution, galaxies: individual: IC10, galaxies: irregular, Local Group
Retrieve 16 NED objects in this reference.
Please click here for ADS abstract

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