Emission-line maps with OSIRIS-TF: The case of M101

Bibcode
2013RMxAC..42...20M
Méndez-Abreu, J.
Bibliographical reference

Fourth Science Meeting with the GTC (Eds. C. Muñoz-Tuñón & J. M. Rodríguez-Espinosa) Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias) Vol. 42, pp. 20-21 (2013) (http://www.astroscu.unam.mx/~rmaa/)

Advertised on:
5
2013
Number of authors
1
IAC number of authors
1
Citations
0
Refereed citations
0
Description
We investigate the suitability of GTC/OSIRIS Tunable Filters (TFs) for obtaining emission-line maps of extended objects. We developed a technique to reconstruct an emission-line image from a set of images taken at consecutive central wavelengths. We demonstrate the feasibility of the reconstruction method by generating a flux calibrated Hα image of the well-known spiral galaxy M101. We tested our emission-line fluxes and ratios by using data present in the literature. We found that the differences in both Hα fluxes and N II/Hα line ratios are ~15% and ~50%, respectively. These results are fully in agreement with the expected values for our observational setup. The proposed methodology will allow us to use OSIRIS/GTC to perform accurate spectrophotometric studies of extended galaxies in the local Universe.
Type
Non-refereed
Galaxies
Star formation

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