Integral field spectroscopy of the nearby spiral galaxy NGC~5668

Details Integral field spectroscopy of the nearby spiral galaxy NGC~5668 Integral field spectroscopy of the nearby spiral galaxy NGC~5668

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011hsa6.conf..238m&link_type=abstract

Highlights of Spanish Astrophysics VI, Proceedings of the IX Scientific Meeting of the Spanish Astronomical Society (SEA), held

Astronomy and Astrophysics

Astrophysics

Scientific paper

We analyze the full bi-dimensional spectral cube of the nearby spiral galaxy NGC 5668, which was obtained as a mosaic of 6 pointings, covering a total area of 2x3 arcmin^2, obtained with the PPAK Integral Field Unit at the Calar Alto (CAHA) observatory 3.5 m telescope. From these data we the bidimensional spatial distribution maps of the attenuation of the ionized gas (from the Hα/Hβ Balmer decrement), and chemical abundances of oxygen (using strong line methods such as the R_{23}). In addition to these maps, we also extract the spectra of individual HII regions by adding the flux over several PPAK fibers to increase the signal-to-noise ratio of the spectra and reduce the uncertainties in the properties derived. The spectra of these regions are compared with the predictions of evolutionary synthesis models for evolved stellar populations. Both the measurements of spectroscopic indices and the full spectra will be used. Finally, given that most of the properties of the stars, gas, and dust in galaxies vary with radius the spectra of concentric annuli are also extracted and analyzed.

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