PPAK Integral Field Spectroscopy survey of the Orion Nebula: Data Release

Details PPAK Integral Field Spectroscopy survey of the Orion Nebula: Data Release PPAK Integral Field Spectroscopy survey of the Orion Nebula: Data Release

2006-11-11

arxiv.org/abs/astro-ph/0611363v3

Astronomy and Astrophysics

Astrophysics

13 pages, 8 figures, accepted for publishing in Astronomy & Astrophysics

Scientific paper

10.1051/0004-6361:20066620

We present a low-resolution spectroscopic survey of the Orion nebula which data we release for public use. In this article, we intend to show the possible applications of this dataset analyzing some of the main properties of the nebula. We perform an integral field spectroscopy mosaic of an area of ~5' X 6' centered on the Trapezium region of the nebula, including the ionization front to the south-east. The analysis of the line fluxes and line ratios of both the individual and integrated spectra allowed us to determine the main characteristics of the ionization throughtout the nebula.The final dataset comprises 8182 individual spectra, which sample each one a circular area of \~2.7" diameter. The data can be downloaded as a single row-stacked spectra fits file plus a position table or as an interpolated datacube with a final sampling of 1.5"/pixel. The integrated spectrum across the field-of-view was used to obtain the main integrated properties of the nebula, including the electron density and temperature, the dust extinction, the Halpha integrated flux (after correcting for dust reddening), and the main diagnostic line ratios. The individual spectra were used to obtain line intensity maps of the different detected lines. These maps were used to study the distribution of the ionized hydrogen, the dust extinction, the electron density and temperature, and the helium and oxygen abundance...

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