252 citations · 300 across the 3 of their papers we have counts for
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astro-ph2007★ 29 cited
The S2N2 metallicity calibrator and the abundance gradient of M 33
K. Viironen, G. Delgado-Inglada, A. Mampaso +2
We introduce the log(Ha/[SII]6717+6731) vs. log(Ha/[NII]6583) (S2N2) diagnostic diagram as metallicity and ionisation parameter indicator for HII regions in external galaxies. The…
astro-ph2001★ 19 cited
New candidate planetary nebulae in M81
L. Magrini, M. Perinotto, R. L. M. Corradi +1
A 34 x 34 arcmin field centred on the spiral galaxy M81 has been searched for emission-line objects using the prime focus wide field camera (WFC) of the 2.54 m Isaac Newton Telesco…