J/AJ/116/1626 Spiral and lenticular galaxy brightness profiles (Baggett+, 1998)
Bulge-disk decomposition of 659 spiral and lenticular galaxy brightness profiles
Baggett W.E., Baggett S.M., Anderson K.S.J.
<Astron. J. 116, 1626 (1998)>
=1998AJ....116.1626B 1998AJ....116.1626B (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, optical ; Photometry ; Morphology
Keywords: galaxies: photometry - galaxies: spiral
Abstract:
We present one of the largest homogeneous sets of spiral and
lenticular galaxy brightness profile decompositions completed to date.
The 659 galaxies in our sample have been fitted with a de Vaucouleurs
law for the bulge component and an inner-truncated exponential for the
disk component. Of the 659 galaxies in the sample, 620 were
successfully fitted with the chosen fitting functions. The fits are
generally well defined, with more than 90% having rms deviations from
the observed profile of less than 0.35mag. We find no correlations of
fitting quality, as measured by these rms residuals, with either
morphological type or inclination. Similarly, the estimated errors of
the fitted coefficients show no significant trends with type or
inclination. These decompositions form a useful basis for the study of
the light distributions of spiral and lenticular galaxies. The object
base is sufficiently large that well-defined samples of galaxies can
be selected from it.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 132 620 Galaxy fit parameters
table3.dat 46 620 Parameter fractional errors
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See also:
VII/118 : NGC 2000.0 (Sky Publishing, ed. Sinnott 1988)
VII/155 : Third Reference Cat. of Bright Galaxies (RC3) (de Vaucouleurs+ 1991)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- NGC/IC NGC or IC (Cat. VII/118) galaxy name
10- 16 A7 --- Type Revised Hubble type from RC3 (VII/155)
18- 21 F4.1 --- TType T-type from RC3 (VII/155)
23- 26 F4.2 --- R25 Axis ratio [log(a/b)] from RC3 (VII/155)
28- 30 I3 arcsec Range1m Minimum value of first fitting range
31 A1 --- --- [-]
32- 35 I4 arcsec Range1M Maximum value of first fitting range
36 A1 --- --- [,]
37- 39 I3 arcsec Range2m ? Minimum value of second fitting range
40 A1 --- --- [-]
41- 43 I3 arcsec Range2M ? Maximum value of second fitting range
44 A1 --- --- [,]
45- 47 I3 arcsec Range3m ? Minimum value of third fitting range
48 A1 --- --- [-]
49- 51 I3 arcsec Range3M ? Maximum value of third fitting range
53- 57 F5.2 mag/arcsec2 mue ? Bulge effective surface brightness
in V band
59- 64 F6.1 arcsec re ? Bulge effective radius
66- 70 F5.2 mag/arcsec2 mu0 ? Disk central surface brightness in V band
72- 78 F7.2 arcsec r0 ? Disk scale length
80- 84 F5.1 arcsec rh ? Disk hole radius
86- 89 F4.2 mag/arcsec2 rms Unweighted rms deviation of the fit
in V band
91 I1 arcsec Seeing Seeing in arcseconds from the PANBG
93- 97 F5.2 mag/arcsec2 mu0e ? Fully corrected bulge effective surface
brightness in V band
99-105 F7.2 arcsec r0e ? Fully corrected bulge effective radius
107-114 A8 --- Notes [A-J,? ] Notes about individual galaxies (1)
117-118 I2 h RAh Right Ascension J2000 (hours) (2)
119-120 I2 min RAm Right Ascension J2000 (minutes) (2)
121-124 F4.1 s RAs Right Ascension J2000 (seconds) (2)
126 A1 --- DE- Declination J2000 (sign) (2)
127-128 I2 deg DEd Declination J2000 (degrees) (2)
129-130 I2 arcmin DEm Declination J2000 (minutes) (2)
131-132 I2 arcsec DEs ? Declination J2000 (seconds) (2)
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Note (1): most of the notes are unexplained:
A: Prominent arm/bar/ring/dust lane removed from fit
B: Much structure in profile
C: truncated disk fit to a bright arm or lens
D: bar near major axis
E: bar near minor axis
F: bar between axes
G: edge-on
H: box/peanut bulge evident in published image
I: interacting
J: NGC 4891 is not included in the RC3, but it appears to be listed as
NGC 4897. The RC3 data listed are those for NGC 4897
?: Uncertainty flag
Note (2): Position not in original table, added at CDS from RC3 catalogue
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- NGC/IC Galaxy designation
10- 19 F10.4 --- D(Ie) ? Fractional error on bulge effective intensity
(surface intensity at bulge effective radius)
21- 26 F6.3 --- D(re) ? Fractional error on bulge effective radius
28- 32 F5.3 --- D(I0) ? Fractional error on disk central intensity
34- 40 F7.3 --- D(r0) ? Fractional error on disk scale length
42- 46 F5.3 --- D(rh) ? Fractional error on disk hole radius
(disk central cutoff radius)
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History: From AJ electronic version
(End) James Marcout, Patricia Bauer [CDS] 09-Mar-1999