Astronomy and Astrophysics – Astronomy
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.0803y&link_type=abstract
American Astronomical Society Meeting 210, #08.03; Bulletin of the American Astronomical Society, Vol. 39, p.103
Astronomy and Astrophysics
Astronomy
Scientific paper
Calculating the star formation rate of an entire galaxy at moderate redshifts has traditionally been accomplished through the use of slit spectroscopy. However this method lacks the ability to reveal the overall structure of the target galaxy. Utilizing the Integral Field Unit of GMOS on Gemini North, we are undertaking a study to map the star-forming regions of distant galaxies. With the H-alpha flux shifted beyond the range of the IFU, we instead measured the star formation rate from the [OII] emission line. Surveying 6 galaxies with strong integrated emission luminosity, we expected to find significant star formation in each. However, only 2 galaxies (SA68-1790 and SA68-3187) showed any detectable [OII] emission in the IFU. SA68-1790 and SA68-3187 are the bluest of the targets but their integrated emission line luminosities and rest-frame B-band magnitudes are faint. Of particular interest is that of all the candidates, SA68-3187 has a large neighboring galaxy and SA68-1790 has at least two faint companions, although chance projection can not be ruled out until redshifts for these companions are secured. How this may be affecting the star formation is currently under investigation. We will also present an improved version of the Gemini data reduction software.
Chun Mark
Takmiya M.
Willmer Christopher
Young Michael
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