Wolf-Rayet population in M83 (Hadfield+, 2005)

Details Wolf-Rayet population in M83 (Hadfield+, 2005) Wolf-Rayet population in M83 (Hadfield+, 2005)

Mar 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ycat..34390265h&link_type=abstract

VizieR On-line Data Catalog: J/A+A/439/265. Originally published in: 2005A&A...439..265H

Physics

Galaxies: Spectra, Equivalent Widths, Stars: Variable

Scientific paper

We have observed M83 with the ESO Very Large Telescope UT4 (Yepun) and Focal Reduced/Low Dispersion Spectrograph #2 (FORS2). The detector consists of a mosaic of two 2048x1024 MIT/LL CCDs which in conjunction with the standard collimator provides a field-of-view 6.8'x6.8' and an image scale of 0.126"/pixel. Photometric observations of M83 were made between May-June 2002 with follow-up spectroscopic data being acquired during April-June 2003.
FORS2 was used on 2 June 2002 to obtain narrow-band images with central wavelengths 4684{AA}, 4781{AA} and band widths of 66{AA} and 68{AA} respectively. These were obtained consecutively for each Field in seeing conditions between 0.6-0.8" with individual exposures of 1800s. The {lambda}4684 filter is coincident with the strong WR emission features which incorporates the N III ({lambda}4640{AA}), C III ({lambda}4650{AA}) and He II ({lambda}4686{AA}) emission lines, whereas the latter samples a wavelength region relatively free from emission, providing a measure of the continuum level.
(3 data files).

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