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J/ApJ/706/553       Fluxes in nearby star-forming galaxies      (Boquien+, 2009)
Star-forming or starbursting? The ultraviolet conundrum.
    Boquien M., Calzetti D., Kennicutt R., Dale D., Engelbracht C.,
    Gordon K.D., Hong S., Lee J.C., Portouw J.
   <Astrophys. J., 706, 553-570 (2009)>
   =2009ApJ...706..553B
ADC_Keywords: Galaxies, nearby ; Photometry, infrared ; Abundances ;
              Photometry, ultraviolet ; Photometry, UBVRI ; Photometry, H-alpha
Keywords: galaxies: spiral - infrared: galaxies - ultraviolet: galaxies


Abstract:
    Compared to starburst galaxies, normal star-forming galaxies have been
    shown to display a much larger dispersion of the dust attenuation at
    fixed reddening through studies of the IRX-β diagram (the IR/UV
    ratio "IRX" versus the UV color "β"). To investigate the causes
    of this larger dispersion and attempt to isolate second parameters, we
    have used GALEX UV, ground-based optical, and Spitzer infrared imaging
    of eight nearby galaxies, and examined the properties of individual UV
    and 24um selected star-forming regions. We concentrated on
    star-forming regions, in order to isolate simpler star formation
    histories than those that characterize whole galaxies.

Description:
    The final sample consists of eight nearby star-forming galaxies. Their
    SFRs range from 0.004M☉/yr/kpc2 to 0.046M_☉/yr/kpc2 with
    an average of 0.020±0.021M_☉/yr/kpc2 calculated over the area
    defined by R25.
    We have obtained far- and near-ultraviolet processed count and
    intensity maps from the GALEX archives.
    Ground-based optical images consist of narrowband Hα
    observations as well as broadband U, B, and R observations. Most
    Hα and Spitzer images have been obtained from the Spitzer
    Infrared Nearby Galaxies Survey (SINGS; Kennicutt et al.
    2003PASP..115..928K) archives.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        82        8   Galaxy parameters
table4.dat       139      324   Apertures positions and fluxes


See also:
   J/ApJS/192/6   : A GALEX UV imaging survey of nearby galaxies (Lee+, 2011)
   J/ApJS/190/233 : Spectroscopy and abundances of SINGS galaxies (Moustakas+,
                    2010)
   J/ApJS/178/247 : Hα and [NII] survey in local 11 Mpc (Kennicutt+, 2008)
   J/ApJS/173/185 : GALEX ultraviolet atlas of nearby galaxies (Gil de Paz+,
                    2007)
   J/A+A/446/839  : Hα surface photometry in nearby clusters (Gavazzi+,
                    2006)
   J/ApJS/164/81  : Spectrophotometry of nearby galaxies (Moustakas+, 2006)
   J/ApJ/630/784  : UBVR observations of nearby galaxies (Taylor+, 2005)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   1-  3  A3    ---     ---       [NGC]
   5-  8  I04   ---     NGC       NGC number
      10  A1    ---     ---       [M ]
  12- 14  I3    ---     M         ? Messier number
  16- 20  A5    ---     MType     Morphological type
  22- 23  I2    h       RAh       NED Hour of right ascension (J2000)
  25- 26  I2    min     RAm       NED Minute of right ascension (J2000)
  28- 31  F4.1  s       RAs       NED Second of right ascension (J2000)
      33  A1    ---     DE-       NED Sign of declination (J2000)
  34- 35  I2    deg     DEd       NED Degree of declination (J2000)
  37- 38  I2    arcmin  DEm       NED Arcminute of declination (J2000)
  40- 41  I2    arcsec  DEs       NED Arcsecond of declination (J2000)
  43- 46  F4.2  Mpc     Dist      Distance
  48- 50  I3    deg     PA        Position angle (1)
  52- 55  F4.1  arcmin  amaj      NED Major axis
  57- 60  F4.1  arcmin  bmin      NED Minor axis
  62- 66  F5.2  arcmin  rho25     Radius of the major axis at the
                                  µB=25mag/arcsec2 isophote (2)
  68- 71  F4.2  [-]     [O/H]     Oxygen abundance (12+logO/H (rho=0)) (2)
  73- 77  F5.2  [-]     D[O/H]    O/H gradient normalized to rho25
                                  (Δ[O/H] in dex/ρ25) (2)
  79- 82  F4.2  ---     [NII]/Ha  ? The mean [NII]/[Hα] ratio (3)

Note (1): The position angle is calculated manually adjusting an ellipse
     to the galaxy in the R-band image (if available).
Note (2): Data obtained from Zaritsky et al. (1994ApJ...420...87Z) and
     Moustakas et al. (2010, Cat. J/ApJS/190/233).
Note (3): The measured fluxes have been corrected for contamination by the
     [NII] lines accordingly. As no spectrum was available for the
     high-metallicity galaxy NGC 5236, we have assumed [NII]/[Hα]=0.5,
     close to 0.53 found by Kennicutt et al. (2008, Cat. J/ApJS/178/247).


Byte-by-byte Description of file: table4.dat

   Bytes Format Units   Label     Explanations

   1- 13  A13   ---   [BCK2009b]  Identification (NGC NNNN-[U/I]-NN) (1)
  15- 16  I2    h       RAh       Hour of Right Ascension (J2000) (2)
  18- 19  I2    min     RAm       Minute of Right Ascension (J2000) (2)
  21- 24  F4.1  s       RAs       Second of Right Ascension (J2000) (2)
      26  A1    ---     DE-       Sign of the Declination (J2000) (2)
  27- 28  I2    deg     DEd       Degree of Declination (J2000) (2)
  30- 31  I2    arcmin  DEm       Arcminute of Declination (J2000) (2)
  33- 34  I2    arcsec  DEs       Arcsecond of Declination (J2000) (2)
  36- 39  F4.2  mJy     FFUV      Far ultraviolet band flux density (3)
  41- 44  F4.2  mJy     e_FFUV    Uncertainty in FUV
  46- 50  F5.2  mJy     FNUV      Near ultraviolet band flux density (3)
  52- 55  F4.2  mJy     e_FNUV    Uncertainty in NUV
  57- 61  F5.2  mJy     FU        U band flux density (3)
  63- 66  F4.2  mJy     e_FU      Uncertainty in U
  68- 72  F5.2  mJy     FB        B band flux density (3)
  74- 77  F4.2  mJy     e_FB      Uncertainty in B
  79- 84  F6.2  mJy     FR        ?=-99.99 R band flux density (3)
  86- 91  F6.2  mJy     e_FR      ?=-99.99 Uncertainty in R
  93- 98  F6.2  mJy     F8        Aperture corrected 8um band flux density (4)
 100-104  F5.2  mJy     e_F8      Uncertainty in F8
 106-113  F8.3  mJy     F24       Aperture corrected 24um band flux density (4)
 115-120  F6.2  mJy     e_F24     Uncertainty in F24
 122-127  F6.2 10-17W/m2/s Ha     ?=-99.99 Hα flux (3)
 129-134  F6.2 10-17W/m2/s e_Ha   ?=-99.99 Uncertainty in Ha
 136-139  F4.1  arcsec  Re        Effective radius

Note (1): Format: names of the galaxy-band of selection-number. U
     (respectively I) indicates that the aperture has been defined from the
     FUV (resp. 24 micron) image.
Note (2): Position of the barycenter of the apertures.

Note (3): Stellar and ionized gas fluxes have been corrected for the
     Galactic foreground extinction using the Cardelli et al.
     (1989ApJ...345..245C) law.
Note (4): Stellar emission in the 8 micron band has been subtracted using
     the relation presented in Helou et al. (2004ApJS..154..253H):
     Fν(8PAH)=Fν(8)-0.232xFν(3.6).


History:
    From electronic version of the journal
(End)                 Greg Schwarz [AAS], Emmanuelle Perret [CDS]    13-Dec-2011