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
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