Emission-Line Fluxes of Northern Planetary Nebulae

TL;DR

This paper provides new spectrophotometric emission line flux measurements for 17 northern planetary nebulae, including 12 first-time measurements, expanding the data available for nebular analysis and calibration.

Contribution

It presents the first flux measurements for 12 planetary nebulae and extends emission line flux standards to the Northern hemisphere.

Findings

Line flux measurements for 12 PNe are reported for the first time.

Electron temperatures, densities, and chemical abundances were calculated.

Data supports future photometric and spectrometric studies of nebulae and related objects.

Abstract

We present long slit spectrophotometric emission line fluxes of bright and extended (<5 arcsec in diameter) Planetary Nebulae (PNe) selected from Acker et al. 1992 catalog with suitable equitorial coordinates for Northern hemisphere. In total, 17 PNe have been choosen and observed in 2008--2010. To measure absolute fluxes, broad slit sizes, ranging from 3.5\arcsec to 7.5\arcsec were used and thus equivalent widths of all observable emission line fluxes were also calculated. Among 17 PNe's observed, line flux measurements of 12 of them were made for the first time. This work also aims to extend the sky coverage of emission line flux standards in Northern hemisphere (Dopita & Hua 1997 - 52 PNe in Southern hemisphere; Wright et al. 2005 - 6 PNe in Northern hemisphere). Electron temperatures and densities, and chemical abundances of these PNe were also calculated in this work. These data is expected to lead the photometric or spectrometric further work for absolute emission line flux measurements needed for \hii regions, supernova remnants etc.