Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.2703b&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #27.03; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the results of a photometric survey of optical emission line regions in M33. Using data from the Local Group Galaxy Survey (LGGS see Massey et al, 2006)), we created continuum-subtracted H-alpha, [OIII] and [SII] emission line images and used flux contours on the H-alpha images to define emission line regions. To date, we have obtained photometric measurements for over 2850 H -alpha emission regions, with a faint flux limit of 10 -15 ergs-sec-1-cm-2 in the outer regions of the galaxy. Our global H Ι region luminosity function displays a broad peak centered at a luminosity of 6 x 10 35 ergs-sec-1 and extends to fainter luminosities than previously published surveys. We used the H-alpha-defined emission regions to determine fluxes for the [OIII] and [SII] images and created RGB images combining the calibrated emission images from all three filters. These RGB emission line images are being used with our [OIII]/ H-alpha and [SII]/ H-alpha line ratios and published catalogs to develop visual diagnostic tools to identify H II regions, planetary nebulae and supernova remnants in M33. Additional results from the LGGS data are being presented elsewhere at this meeting; see Massey et al and McNeill et al.
Adhikari Arpita
Blaha Cindy
Gavilan L.
Hodge Paul
Martin Rafael
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