J/A+AS/118/557 J/A+AS/118/557 Near-IR photometry of 86 galaxies. II. R S De Jong Astron. Astrophys. Suppl. Ser. 118 557 1996 1996A&AS..118..557D J/A+A/313/377 : Near-IR photometry of 86 galaxies. IV. (de Jong 1996) Galaxies, photometry galaxies: fundamental parameters galaxies: photometry galaxies: spiral galaxies: structure methods: data analysis surveys In this Paper I present a new two-dimensional decomposition technique, which models the surface photometry of a galaxy with an exponential light profile for both bulge and disk and, when necessary, with a Freeman bar. The new technique w as tested for systematic errors on both artificial and real data and compared with widely used one-dimensional decomposition techniques, where the luminosity profile of the galaxy is used. The comparisons indicate that a decomposition of the two-dimensional image of the galaxy with an exponential light profile for both bulge and disk yields the most reproducible and representative bulge and disk parameters. An extensive error analysis was made to determine the reliability of the model parameters. If the model with an exponential bulge profile is a reasonable description of a galaxy, the maximum errors in the derived model parameters are of order 20%. The uncertainties in the model parameters will increase, if the exponential bulge function is replaced by other often used bulge functions as the de Vaucouleurs law. All decomposition methods were applied to the optical and near-infrared data set presented by de Jong & van der Kruit (1994), which comprises 86 galaxies in six passbands.

RAh Right Ascension 2000 (hours) h RAm Right Ascension 2000 (minutes) min DE- Declination 2000 (sign) --- DEd Declination 2000 (degrees) deg DEm Declination 2000 (minutes) arcmin UGC Name of galaxy in UGC <VII/26> --- Names Other names --- UGC Name of galaxy in UGC <VII/26> --- QBmag =-999 Q parameter for B band number=1 Q parameter as in thesis 1: photometric 2: 0.0-0.2 mag error 3: 0.2-0.5 4: 0.5-1.0 5: >1.0 -999 not available in this passband --- QVmag =-999 Q parameter for V band number=1 Q parameter as in thesis 1: photometric 2: 0.0-0.2 mag error 3: 0.2-0.5 4: 0.5-1.0 5: >1.0 -999 not available in this passband --- QRmag =-999 Q parameter for R band number=1 Q parameter as in thesis 1: photometric 2: 0.0-0.2 mag error 3: 0.2-0.5 4: 0.5-1.0 5: >1.0 -999 not available in this passband --- QImag =-999 Q parameter for I band number=1 Q parameter as in thesis 1: photometric 2: 0.0-0.2 mag error 3: 0.2-0.5 4: 0.5-1.0 5: >1.0 -999 not available in this passband --- QHmag =-999 Q parameter for H band number=1 Q parameter as in thesis 1: photometric 2: 0.0-0.2 mag error 3: 0.2-0.5 4: 0.5-1.0 5: >1.0 -999 not available in this passband --- QKmag =-999 Q parameter for K band number=1 Q parameter as in thesis 1: photometric 2: 0.0-0.2 mag error 3: 0.2-0.5 4: 0.5-1.0 5: >1.0 -999 not available in this passband --- UGC Name of galaxy in UGC <VII/26> --- Bfcs Central surface brightness of the disk mag/arcsec+2 e_Bfcs Formal fit error in Bfcs (real uncertainty in general much larger) mag/arcsec+2 Bfsc Scale length of disk arcsec e_Bfsc Formal fit error in Bfsc arcsec Bfes Central! (not effective) surface brightness of bulge mag/arcsec+2 e_Bfes Formal fit error in Bfes mag/arcsec+2 Bfer Bulge scale length (not effective radius) arcsec e_Bfer Formal fit error in Bfer arcsec Bfbc Central brightness of the bar mag/arcsec+2 e_Bfbc Formal fit error in Bfbc mag/arcsec+2 Bfma Bar major axis arcsec e_Bfma Formal fit error in Bfma arcsec Bfmi Bar minor axis arcsec e_Bfmi Formal fit error in Bfmi arcsec Bfpa Position angle of the bar deg e_Bfpa Formal fit error in Bfpa deg Vfcs Central surface brightness of the disk mag/arcsec+2 e_Vfcs Formal fit error in Vfcs (real uncertainty in general much larger) mag/arcsec+2 Vfsc Scale length of disk arcsec e_Vfsc Formal fit error in Vfsc arcsec Vfes Central! (not effective) surface brightness of bulge mag/arcsec+2 e_Vfes Formal fit error in Vfes mag/arcsec+2 Vfer Bulge scale length (not effective radius) arcsec e_Vfer Formal fit error in Vfer arcsec Vfbc Central brightness of the bar mag/arcsec+2 e_Vfbc Formal fit error in Vfbc mag/arcsec+2 Vfma Bar major axis arcsec e_Vfma Formal fit error in Vfma arcsec Vfmi Bar minor axis arcsec e_Vfmi Formal fit error in Vfmi arcsec Vfpa Position angle of the bar deg e_Vfpa Formal fit error in Vfpa deg Rfcs Central surface brightness of the disk mag/arcsec+2 e_Rfcs Formal fit error in Rfcs (real uncertainty in general much larger) mag/arcsec+2 Rfsc Scale length of disk arcsec e_Rfsc Formal fit error in Rfsc arcsec Rfes Central! (not effective) surface brightness of bulge mag/arcsec+2 e_Rfes Formal fit error in Rfes mag/arcsec+2 Rfer Bulge scale length (not effective radius) arcsec e_Rfer Formal fit error in Rfer arcsec Rfbc Central brightness of the bar mag/arcsec+2 e_Rfbc Formal fit error in Rfbc mag/arcsec+2 Rfma Bar major axis arcsec e_Rfma Formal fit error in Rfma arcsec Rfmi Bar minor axis arcsec e_Rfmi Formal fit error in Rfmi arcsec Rfpa Position angle of the bar deg e_Rfpa Formal fit error in Rfpa deg Ifcs Central surface brightness of the disk mag/arcsec+2 e_Ifcs Formal fit error in Ifcs (real uncertainty in general much larger) mag/arcsec+2 Ifsc Scale length of disk arcsec e_Ifsc Formal fit error in Ifsc arcsec Ifes Central! (not effective) surface brightness of bulge mag/arcsec+2 e_Ifes Formal fit error in Ifes mag/arcsec+2 Ifer Bulge scale length (not effective radius) arcsec e_Ifer Formal fit error in Ifer arcsec Ifbc Central brightness of the bar mag/arcsec+2 e_Ifbc Formal fit error in Ifbc mag/arcsec+2 Ifma Bar major axis arcsec e_Ifma Formal fit error in Ifma arcsec Ifmi Bar minor axis arcsec e_Ifmi Formal fit error in Ifmi arcsec Ifpa Position angle of the bar deg e_Ifpa Formal fit error in Ifpa deg Hfcs Central surface brightness of the disk mag/arcsec+2 e_Hfcs Formal fit error in Hfcs (real uncertainty in general much larger) mag/arcsec+2 Hfsc Scale length of disk arcsec e_Hfsc Formal fit error in Hfsc arcsec Hfes Central! (not effective) surface brightness of bulge mag/arcsec+2 e_Hfes Formal fit error in Hfes mag/arcsec+2 Hfer Bulge scale length (not effective radius) arcsec e_Hfer Formal fit error in Hfer arcsec Hfbc Central brightness of the bar arcsec e_Hfbc Formal fit error in Hfbc arcsec Hfma Bar major axis arcsec e_Hfma Formal fit error in Hfma arcsec Hfmi Bar minor axis arcsec e_Hfmi Formal fit error in Hfmi arcsec Hfpa Position angle of the bar deg e_Hfpa Formal fit error in Hfpa deg Kfcs Central surface brightness of the disk mag/arcsec+2 e_Kfcs Formal fit error in Kfcs (real uncertainty in general much larger) mag/arcsec+2 Kfsc Scale length of disk arcsec e_Kfsc Formal fit error in Kfsc arcsec Kfes Central! (not effective) surface brightness of bulge mag/arcsec+2 e_Kfes Formal fit error in Kfes mag/arcsec+2 Kfer Bulge scale length (not effective radius) arcsec e_Kfer Formal fit error in Kfer arcsec Kfbc Central brightness of the bar mag/arcsec+2 e_Kfbc Formal fit error in Kfbc mag/arcsec+2 Kfma Bar major axis arcsec e_Kfma Formal fit error in Kfma arcsec Kfmi Bar minor axis arcsec e_Kfmi Formal fit error in Kfmi arcsec Kfpa Position angle of the bar deg e_Kfpa Formal fit error in Kfpa deg UGC Name of galaxy in UGC <VII/26> --- Bfcs Central surface brightness of the disk mag/arcsec+2 e_Bfcs Fit error due to sky uncertainties in Bfcs mag/arcsec+2 Bfsc Scale length of disk arcsec e_Bfsc Fit error due to sky uncertainties in Bfsc arcsec Bfes Effective surface brightness of bulge mag/arcsec+2 e_Bfes Fit error due to sky uncertainties in Bfes mag/arcsec+2 Bfer Effective radius of the bulge arcsec e_Bfer Fit error due to sky uncertainties in Bfer arcsec Vfcs Central surface brightness of the disk mag/arcsec+2 e_Vfcs Fit error due to sky uncertainties in Vfcs mag/arcsec+2 Vfsc Scale length of disk arcsec e_Vfsc Fit error due to sky uncertainties in Vfsc arcsec Vfes Effective surface brightness of bulge mag/arcsec+2 e_Vfes Fit error due to sky uncertainties in Vfes mag/arcsec+2 Vfer Effective radius of the bulge arcsec e_Vfer Fit error due to sky uncertainties in Vfer arcsec Rfcs Central surface brightness of the disk mag/arcsec+2 e_Rfcs Fit error due to sky uncertainties in Rfcs mag/arcsec+2 Rfsc Scale length of disk arcsec e_Rfsc Fit error due to sky uncertainties in Rfsc arcsec Rfes Effective surface brightness of bulge mag/arcsec+2 e_Rfes Fit error due to sky uncertainties in Rfes mag/arcsec+2 Rfer Effective radius of the bulge arcsec e_Rfer Fit error due to sky uncertainties in Rfer arcsec Ifcs Central surface brightness of the disk mag/arcsec+2 e_Ifcs Fit error due to sky uncertainties in Ifcs mag/arcsec+2 Ifsc Scale length of disk arcsec e_Ifsc Fit error due to sky uncertainties in Ifsc arcsec Ifes Effective surface brightness of bulge mag/arcsec+2 e_Ifes Fit error due to sky uncertainties in Ifes mag/arcsec+2 Ifer Effective radius of the bulge arcsec e_Ifer Fit error due to sky uncertainties in Ifer arcsec Hfcs Central surface brightness of the disk mag/arcsec+2 e_Hfcs Fit error due to sky uncertainties in Hfcs mag/arcsec+2 Hfsc Scale length of disk arcsec e_Hfsc Fit error due to sky uncertainties in Hfsc arcsec Hfes Effective surface brightness of bulge mag/arcsec+2 e_Hfes Fit error due to sky uncertainties in Hfes mag/arcsec+2 Hfer Effective radius of the bulge arcsec e_Hfer Fit error due to sky uncertainties in Hfer arcsec Kfcs Central surface brightness of the disk mag/arcsec+2 e_Kfcs Fit error due to sky uncertainties in Kfcs mag/arcsec+2 Kfsc Scale length of disk arcsec e_Kfsc Fit error due to sky uncertainties in Kfsc arcsec Kfes Effective surface brightness of bulge mag/arcsec+2 e_Kfes Fit error due to sky uncertainties in Kfes mag/arcsec+2 Kfer Effective radius of the bulge arcsec e_Kfer Fit error due to sky uncertainties in Kfer arcsec UGC Name of galaxy in UGC <VII/26> --- Bfcs Central surface brightness of the disk mag/arcsec+2 e_Bfcs Fit error due to sky uncertainties in Bfcs mag/arcsec+2 Bfsc Scale length of disk arcsec e_Bfsc Fit error due to sky uncertainties in Bfsc arcsec Bfes Central! (not effective) surface brightness of bulge number=1 tableff: add 2.5*lg(39.3305) to get effective surface brightness tableef: add 2.5*lg(5.36019) to get effective surface brightness mag/arcsec+2 e_Bfes Fit error due to sky uncertainties in Bfes mag/arcsec+2 Bfer Bulge scale length (not eff. radius) number=2 tableef: multiply by 1.679 to get effective radius arcsec e_Bfer Fit error due to sky uncertainties in Bfer arcsec Vfcs Central surface brightness of the disk mag/arcsec+2 e_Vfcs Fit error due to sky uncertainties in Vfcs mag/arcsec+2 Vfsc Scale length of disk arcsec e_Vfsc Fit error due to sky uncertainties in Vfsc arcsec Vfes Central! (not effective) surface brightness of bulge number=1 tableff: add 2.5*lg(39.3305) to get effective surface brightness tableef: add 2.5*lg(5.36019) to get effective surface brightness mag/arcsec+2 e_Vfes Fit error due to sky uncertainties in Vfes mag/arcsec+2 Vfer Bulge scale length (not eff. radius) number=2 tableef: multiply by 1.679 to get effective radius arcsec e_Vfer Fit error due to sky uncertainties in Vfer arcsec Rfcs Central surface brightness of the disk mag/arcsec+2 e_Rfcs Fit error due to sky uncertainties in Rfcs mag/arcsec+2 Rfsc Scale length of disk arcsec e_Rfsc Fit error due to sky uncertainties in Rfsc arcsec Rfes Central! (not effective) surface brightness of bulge number=1 tableff: add 2.5*lg(39.3305) to get effective surface brightness tableef: add 2.5*lg(5.36019) to get effective surface brightness mag/arcsec+2 e_Rfes Fit error due to sky uncertainties in Rfes mag/arcsec+2 Rfer Bulge scale length (not eff. radius) number=2 tableef: multiply by 1.679 to get effective radius arcsec e_Rfer Fit error due to sky uncertainties in Rfer arcsec Ifcs Central surface brightness of the disk mag/arcsec+2 e_Ifcs Fit error due to sky uncertainties in Ifcs mag/arcsec+2 Ifsc Scale length of disk arcsec e_Ifsc Fit error due to sky uncertainties in Ifsc arcsec Ifes Central! (not effective) surface brightness of bulge number=1 tableff: add 2.5*lg(39.3305) to get effective surface brightness tableef: add 2.5*lg(5.36019) to get effective surface brightness mag/arcsec+2 e_Ifes Fit error due to sky uncertainties in Ifes mag/arcsec+2 Ifer Bulge scale length (not eff. radius) number=2 tableef: multiply by 1.679 to get effective radius arcsec e_Ifer Fit error due to sky uncertainties in Ifer arcsec Hfcs Central surface brightness of the disk mag/arcsec+2 e_Hfcs Fit error due to sky uncertainties in Hfcs mag/arcsec+2 Hfsc Scale length of disk arcsec e_Hfsc Fit error due to sky uncertainties in Hfsc arcsec Hfes Central! (not effective) surface brightness of bulge number=1 tableff: add 2.5*lg(39.3305) to get effective surface brightness tableef: add 2.5*lg(5.36019) to get effective surface brightness mag/arcsec+2 e_Hfes Fit error due to sky uncertainties in Hfes mag/arcsec+2 Hfer Bulge scale length (not eff. radius) number=2 tableef: multiply by 1.679 to get effective radius arcsec e_Hfer Fit error due to sky uncertainties in Hfer arcsec Kfcs Central surface brightness of the disk mag/arcsec+2 e_Kfcs Fit error due to sky uncertainties in Kfcs mag/arcsec+2 Kfsc Scale length of disk arcsec e_Kfsc Fit error due to sky uncertainties in Kfsc arcsec Kfes Central! (not effective) surface brightness of bulge number=1 tableff: add 2.5*lg(39.3305) to get effective surface brightness tableef: add 2.5*lg(5.36019) to get effective surface brightness mag/arcsec+2 e_Kfes Fit error due to sky uncertainties in Kfes mag/arcsec+2 Kfer Bulge scale length (not eff. radius) number=2 tableef: multiply by 1.679 to get effective radius arcsec e_Kfer Fit error due to sky uncertainties in Kfer arcsec Patricia Bauer CDS 1996Jun18Roelof de Jong <R.S.deJong@durham.ac.uk> J_A+AS_118_557.xml