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J/other/RMxAA/44.161      HII regions in NGC 5055                 (Rozas+, 2008)
HII regions in NGC 5055. II. Physical properties.
    Rozas M.
   <Rev. Mex. Astron. Astrofis., 44, 161-170 (2008)>
   =2008RMxAA..44..161R
ADC_Keywords: Galaxies, peculiar ; H II regions ; Photometry, CCD ; Abundances

Keywords: galaxies: individual (NGC 5055) - galaxies: kinematics and dynamics -
          galaxies: spiral

Abstract:
    In this paper, using CCD observations of the galaxy NGC 5055 in the
    emission lines of Halpha and Hbeta (Rozas, 2007RMxAA, submitted),
    together with CCD observations in the narrow-band filters of [OII],
    [OIII], [SII], and S[III] lines we have calculated the equivalent
    widths, excitations, ionization hardness, ionization parameters and
    metallicities for the regions catalogued in Rozas (2007RMxAA,
    submitted).

Description:
    The observations and data reductions procedures for the Halpha and
    Hbeta images are summarized in Paper I (Rozas, 2007RMxAA, submitted).
    The observations of NGC 5055 in the other lines were made during the
    same nights of June 14-18 2005 with the 0.84m telescope of the
    Observatorio Astronomico Nacional in the Sierra San Pedro Martir.
Objects:
    -----------------------------------------
       RA   (2000)   DE     Designation(s)
    -----------------------------------------
    13 15 49.3  +42 01 46   NGC 5055 = M 63
    -----------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        19      274   NGC 5055 [OII], [OIII], [SII] and [SIII] fluxes
table3.dat        18      274   NGC 5055 R23 parameter, oxygen abundance and
                              ionization hardness parameter


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label      Explanations

   1-  3  I3    ---     [R2008]    Region sequential number (location undefined)
   5-  7  I3    ---     [OII]/Hb   ? [OII]/Hbeta abundance ratio (1)
   9- 11  I3    ---     [OIII]/Hb  ? [OIII]/Hbeta abundance ratio (1)
  13- 15  I3    ---     [SII]/Hb   ? [SII]/Hbeta abundance ratio (1)
  17- 19  I3    ---     [SIII]/Hb  ? [SIII]/Hbeta abundance ratio (1)

Note (1): All the quantities are relative to Hbeta=100 and are corrected for
           extinction.


Byte-by-byte Description of file: table3.dat

   Bytes Format Units   Label     Explanations

   1-  3  I3    ---     [R2008]   Region sequential number (location undefined)
   5-  8  F4.2  ---     R23       ? R23 parameter (1)
  10- 13  F4.2  ---  12+log(O/H)  ? 12+log(O/H) abundance
  15- 18  F4.2  ---     eta       ? Ionization hardness parameter (2)

Note (1): R23 defined as:
          R23=[I([OII]3727)+I([OIII]4959,5007)]/I(Hbeta)
Note (2): η is defined as
         η = (([OII]3726,3729)/([OIII]4959,5007))
               / (([SII]3717,6731)/([SIII]9069,9532))


History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    27-Jan-2009