TABLE OF PHOTOMETRIC AND SPECTROSCOPIC PARAMETERS for 304 CF GALAXIES

General Description

Field Name Description
UGC The galaxy UGC number. The last two entries refer to CGCG reference number
N n, the total number of spectroscopic observations per galaxy;
EPS eps, the ellipticity of the best-fitting isophote on the disk-dominated part of the galaxy profile (see C96);
INCL incl, inclination computed with an intrinsic flattening, q0 = 0.18;
vhel vhel, the heliocentric redshift in km/sec. Defined as the center of symmetry of the rotation curve as measured with Model 2 (cf C97);
vlg vlg, the radial velocity corrected for motion with respect to the Local Group; vlg = vhel + 300 sin(l)cos(b); <-- fix!
vcmb vcmb, the radial velocity in the frame of the Cosmic Microwave Background. The correction uses the motion of the Sun with respect to the CMB frame determined by the COBE dipole anisotropy (Kogut \etal 1993);
dv15q dv15q, the velocity width measured from the flux-weighted rotation profile at 15\% of the total area;
eta15 eta15 = log(dv15q) - 2.5;
dv20q dv20q, same as $W_{15}$ but measured at 20\% of the total area;
eta20 eta20 = log(dv20q) - 2.5;
vmax vmax, maximum velocity of RC model 2 (as in C97);
evmax evmax = log(vmax) - 2.5;
vdisk vdisk (equivalent to v2.2), velocity measured from Model 2 at 2.15 disk scalelengths (peak velocity for pure disk);
evdisk evdisk = log(vdisk) - 2.5;
viso viso, "Isophotal" velocity measured from Model 2 at the isophotal level of 23 mag/arcsec^-2;
eviso eviso = log(eviso) - 2.5;
vopt vopt, the velocity from Model 2 measured at r_opt = 3.2h (optical radius as defined by Persic & Salucci);
evopt evopt = log(vopt) - 2.5;
Whist Whist, the velocity difference between the 10th and 90th (interpolated) percentile points in the ranked distribution of velocities;
ewhist ewhist = log(Whist) - 2.5;
ls_m ls_m, the mean logslope dlogv/dlogr from Model 2 using bootstrap least- square fits between r_disk (=2.15h) and the last fitted velocity point;
ls_r ls_r, the logslope measured from the observed RC between r_disk and the last measured velocity point;
ls23 ls23, the logslope measured from the observed RC between r_disk and 3 exponential disk scale lengths;
n_23 n_23, the number of points used to bootstrap ls_23;
sd23 sd23, the 1 sigma deviation for the 100 random realizations in ls_23;
ls24 ls24, the logslope measured from the observed RC between r_disk and 4 exponential disk scale lengths;
n_24 n_24, the number of points used to bootstrap ls_24;
sd24 sd24, the 1 sigma deviation for the 100 random realizations in ls_24
r23kpc r23kpc, the corrected radius at the 23 r mag arcsec^{-2} isophote in kpc. Isophotal radii are corrected for both Galactic extinction effects and cosmological stretch (as in C96). The transformation to kpc assumes a distance from the vlg redshift and a Hubble constant of 70 km/sec/Mpc;
r24kpc r24kpc. Analogous to r23kpc;
r25kpc r25kpc. Analogous to r23kpc and r24kpc;
rmaxkpc rmaxkpc, the maximum radius in kpc from the last measured detection on either side of the RC;
rmax rmax, same as rmaxkpc but expressed in arcsec;
h_sec h["], the corrected scalelength in arcsec. Values from Broeils & Courteau '96 (1D B/D) were adopted when available. All scalelengths are corrected for cosmological stretch. Galactic extinction is irrelevant;
hkpc hkpc, the corrected disk scalelength in kpc;
rmax_ropt rmax/ropt, the maximum RC radius divided by the optical radius measured at 3.2 disk scalelength;
rmax_h rmax/h, the maximum RC radius divided by the disk scalelength;
rp_h rp/h, radius where the rotation curve peaks (often last point of RC) divided by the disk scalelength;
rmag23 rmag23, the corrected apparent magnitude at the 23 mag arcsec^{-2} level. Isophotal and total magnitudes are corrected for Galactic reddening (abcor) and internal extinction (extcor) (see C96);
rmag24 rmag24, the corrected apparent magnitude at the 24 mag arcsec^{-2} level;
rmag25 rmag25, the corrected apparent magnitude at the 25 mag arcsec^{-2} level;
abcorr abcorr, correction for r-band Galactic extinction (C96);
extcorr extcorr, correction for r-band internal extinction (C96);
rmag rmag (m_r^c), the corrected r-band total extrapolated apparent magnitude;
rm2_2 rm2_2, corrected apparent magnitude measured inside r_disk;
absm23 absm23, absolute magnitude of fully corrected rmag23. Absolute magnitudes are computed using LG redshifts and H0=70;
absm25 absm25, absolute magnitude of fully corrected rmag25;
absm2_2 absm2_2, absolute magnitude of fully corrected rm2_2;
absmr absmr, absolute magnitude of fully corrected rmag. absmr = rmag - 5log D[Mpc] + 25;
absBRC3 absBRC3, absolute magnitude of B-band magnitude from fully corrected RC3 raw magnitudes. The correction for Galactic extinction follows a Burstein-Heiles prescription with $A_B = 0.xx$ and our internal correction uses B_Tcorr = B_T - 1.45*loga/b - loga/b_70 Use $A_B = 1.45$ following Cardiff paper Burstein, Willick, \& Courteau 1996;
B_r B-r color term (51 - 50). The mean value is 0.74 +/- 0.23;
L_B L_B, absolute B-band luminosity in solar units /1E10. Assumes $M_B\odot$ = 5.41;
L_B_star L_B*, absolute B-band luminosity divided by Schecter's L* in the B-band. I use M*B = -19.5 + 5.*alog10H0/100. from Stromlo-APM survey. For H0=70, M*B=-20.27 and L*=1.88E+10 in solar units;
D_T D/T, the ratio if fitted disk light to total measured light for the whole galaxy;
D_M2_2 D/M2_2, the ratio if fitted disk light to measured light inside r_disk;
CSB CSB, central surface brightness from disk fits;
DIST DIST, the distance of the galaxy in Mpc, computed as D = vlg/H0 (Inferred TF distances are discarded since peculiar motions are more uncertain than distance errors);
FACT FACT, conversion factor to change arcseconds into kpc;
Gamma Gamma, the exponent term in Model 2 (see function summary below);
Rt_Ropt Rt/Ropt, the turnaround radius in Model 2 divided by the optical radius;
F F, the Freeman Type (I or II);
QHF QHF, 0/1 if the galaxy is away from/included in the Quiet Hubble flow;

Note

  The rotation curve parameterization (Model 2) has the form: 

     vr =  v_0 + v_c * 1+x^b /  1 + x^g^1/g,  where

       x  = r_t/r-r_0

     where:  a1 = v_0    velocity center
             a2 = r_0    position center
             a3 = v_c    asymptotic velocity  (positive if curve has + slope
                                               negative if curve has - slope)
             a4 = r_t    turnover radius between solid-body and flat part
             a5 = Gamma  sharpness of turnover
             a6 = Beta   flat curve drop-off index

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