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J/A+A/551/A82 Line ratios in giant HII region H 1013 (Stasinska+, 2013)
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table3.dat
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Beginning of ReadMe :J/A+A/551/A82 Line ratios in giant HII region H 1013 (Stasinska+, 2013)
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No temperature fluctuations in the giant HII region H 1013.
Stasinska G., Morisset C., Simon-Diaz S., Bresolin F., Schaerer D.,
Brandl B.
<Astron. Astrophys., 551, A82 (2013)>
=2013A&A...551A..82S
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ADC_Keywords: H II regions ; Spectroscopy
Keywords: ISM: abundances - HII regions - galaxies: individual: H 1013
Abstract:
While collisionally excited lines in HII regions allow one to easily
probe the chemical composition of the interstellar medium in galaxies,
the possible presence of important temperature fluctuations casts some
doubt on the derived abundances. To provide new insights into this
question, we have carried out a detailed study of a giant HII region,
H1013, located in the galaxy M101, for which many observational data
exist and which has been claimed to harbour temperature temperature
fluctuations at a level of t^2^=0.03-0.06.
Description:
Cedres & Cepa (2002, Cat. J/A+A/391/809) used CDD observations in
several narrow-band filters to compile a catalogue of 338 HII regions
in the inner parts of M 101 (NGC 5457), also providing information
about their fluxes, extinctions, equivalent widths, spatial
distribution, excitations, radiation hardness, ionization parameters
and metallicities. H1013 is identified as the HII region number
299 in their catalogue.
We use the Halpha and Hbeta continuum-subtracted images (kindly
provided by B. Cedres) in our study. These images were obtained at
the Nordic Optical Telescope with the ALFOSC instrument in direct
imaging mode (spatial resolution of 0.189-arcsec/pix).
Objects:
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RA (2000) DE Designation(s)
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14 03 30.8 +54 21 14 H1013 = HGGK 1013
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