J/A+AS/118/557 Near-IR photometry of 86 galaxies. II. (de Jong 1996)
Near-infrared and optical broadband surface photometry of 86
face-on disk dominated galaxies.
II. A two-dimensional method to determine bulge and disk parameters.
De Jong R.S.
<Astron. Astrophys. Suppl. Ser. 118, 557 (1996)>
=1996A&AS..118..557D 1996A&AS..118..557D (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, photometry
Keywords: methods: data analysis - surveys - galaxies: fundamental parameters -
galaxies: photometry - galaxies: spiral - galaxies: structure
Description:
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.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
galaxies 34 86 List of galaxies
phot 40 86 Photometry information for the different
passbands
tableef 391 86 Decompositions using the 1D technique with an
exponential bulge
tableff 391 86 Decompositions using the 1D technique with
R^(1/2) law bulge
tableqf 391 86 Decompositions using the 1D technique with
R^(1/4) law bulge
tablef 773 86 Decompositions using the 2D technique,
exponential bulge and Freeman bar
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See also:
J/A+A/313/377 : Near-IR photometry of 86 galaxies. IV. (de Jong 1996)
Byte-by-byte Description of file: galaxies
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right Ascension J2000 (hours)
4- 7 F4.1 min RAm Right Ascension J2000 (minutes)
9 A1 --- DE- Declination J2000 (sign)
10- 11 I2 deg DEd Declination J2000 (degrees)
13- 14 I2 arcmin DEm Declination J2000 (minutes)
16- 20 I5 --- UGC [1/12921] Name of galaxy in UGC VII/26
22- 34 A13 --- Names Other names
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Byte-by-byte Description of file: phot
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- UGC [1/12921] Name of galaxy in UGC VII/26
8- 11 I4 --- QBmag [1/5]?=-999 Q parameter for B band (1)
13- 16 I4 --- QVmag [1/5]?=-999 Q parameter for V band (1)
18- 21 I4 --- QRmag [1/5]?=-999 Q parameter for R band (1)
23- 26 I4 --- QImag [1/5]?=-999 Q parameter for I band (1)
30- 33 I4 --- QHmag [1/5]?=-999 Q parameter for H band (1)
37- 40 I4 --- QKmag [1/5]?=-999 Q parameter for K band (1)
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Note (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
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablef
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- UGC [1/12921] Name of galaxy in UGC VII/26
8- 13 F6.3 mag/arcsec+2 Bfcs ? Central surface brightness of the disk
16- 21 F6.3 mag/arcsec+2 e_Bfcs ? Formal fit error in Bfcs (real
uncertainty in general much larger)
24- 29 F6.3 arcsec Bfsc ? Scale length of disk
32- 37 F6.3 arcsec e_Bfsc ? Formal fit error in Bfsc
40- 45 F6.3 mag/arcsec+2 Bfes ? Central! (not effective) surface
brightness of bulge
48- 53 F6.3 mag/arcsec+2 e_Bfes ? Formal fit error in Bfes
56- 61 F6.3 arcsec Bfer ? Bulge scale length (not effective radius)
64- 69 F6.3 arcsec e_Bfer ? Formal fit error in Bfer
72- 77 F6.3 mag/arcsec+2 Bfbc ? Central brightness of the bar
80- 85 F6.3 mag/arcsec+2 e_Bfbc ? Formal fit error in Bfbc
88- 93 F6.3 arcsec Bfma ? Bar major axis
96-101 F6.3 arcsec e_Bfma ? Formal fit error in Bfma
104-109 F6.3 arcsec Bfmi ? Bar minor axis
112-117 F6.3 arcsec e_Bfmi ? Formal fit error in Bfmi
119-125 F7.3 deg Bfpa ? Position angle of the bar
128-133 F6.3 deg e_Bfpa ? Formal fit error in Bfpa
136-141 F6.3 mag/arcsec+2 Vfcs ? Central surface brightness of the disk
144-149 F6.3 mag/arcsec+2 e_Vfcs ? Formal fit error in Vfcs (real
uncertainty in general much larger)
152-157 F6.3 arcsec Vfsc ? Scale length of disk
160-165 F6.3 arcsec e_Vfsc ? Formal fit error in Vfsc
168-173 F6.3 mag/arcsec+2 Vfes ? Central! (not effective) surface
brightness of bulge
176-181 F6.3 mag/arcsec+2 e_Vfes ? Formal fit error in Vfes
183-189 F7.3 arcsec Vfer ? Bulge scale length (not effective radius)
192-197 F6.3 arcsec e_Vfer ? Formal fit error in Vfer
200-205 F6.3 mag/arcsec+2 Vfbc ? Central brightness of the bar
208-213 F6.3 mag/arcsec+2 e_Vfbc ? Formal fit error in Vfbc
216-221 F6.3 arcsec Vfma ? Bar major axis
224-229 F6.3 arcsec e_Vfma ? Formal fit error in Vfma
232-237 F6.3 arcsec Vfmi ? Bar minor axis
240-245 F6.3 arcsec e_Vfmi ? Formal fit error in Vfmi
247-253 F7.3 deg Vfpa ? Position angle of the bar
256-261 F6.3 deg e_Vfpa ? Formal fit error in Vfpa
264-269 F6.3 mag/arcsec+2 Rfcs ? Central surface brightness of the disk
272-277 F6.3 mag/arcsec+2 e_Rfcs ? Formal fit error in Rfcs (real
uncertainty in general much larger)
279-285 F7.3 arcsec Rfsc ? Scale length of disk
287-293 F7.3 arcsec e_Rfsc ? Formal fit error in Rfsc
296-301 F6.3 mag/arcsec+2 Rfes ? Central! (not effective) surface
brightness of bulge
304-309 F6.3 mag/arcsec+2 e_Rfes ? Formal fit error in Rfes
312-317 F6.3 arcsec Rfer ? Bulge scale length (not effective radius)
319-325 F7.3 arcsec e_Rfer ? Formal fit error in Rfer
328-333 F6.3 mag/arcsec+2 Rfbc ? Central brightness of the bar
336-341 F6.3 mag/arcsec+2 e_Rfbc ? Formal fit error in Rfbc
344-349 F6.3 arcsec Rfma ? Bar major axis
351-357 F7.3 arcsec e_Rfma ? Formal fit error in Rfma
360-365 F6.3 arcsec Rfmi ? Bar minor axis
367-373 F7.3 arcsec e_Rfmi ? Formal fit error in Rfmi
375-381 F7.3 deg Rfpa ? Position angle of the bar
384-389 F6.3 deg e_Rfpa ? Formal fit error in Rfpa
392-397 F6.3 mag/arcsec+2 Ifcs ? Central surface brightness of the disk
400-405 F6.3 mag/arcsec+2 e_Ifcs ? Formal fit error in Ifcs (real
uncertainty in general much larger)
408-413 F6.3 arcsec Ifsc ? Scale length of disk
416-421 F6.3 arcsec e_Ifsc ? Formal fit error in Ifsc
424-429 F6.3 mag/arcsec+2 Ifes ? Central! (not effective) surface
brightness of bulge
432-437 F6.3 mag/arcsec+2 e_Ifes ? Formal fit error in Ifes
440-445 F6.3 arcsec Ifer ? Bulge scale length (not effective radius)
448-453 F6.3 arcsec e_Ifer ? Formal fit error in Ifer
456-461 F6.3 mag/arcsec+2 Ifbc ? Central brightness of the bar
464-469 F6.3 mag/arcsec+2 e_Ifbc ? Formal fit error in Ifbc
472-477 F6.3 arcsec Ifma ? Bar major axis
480-485 F6.3 arcsec e_Ifma ? Formal fit error in Ifma
488-493 F6.3 arcsec Ifmi ? Bar minor axis
496-501 F6.3 arcsec e_Ifmi ? Formal fit error in Ifmi
503-509 F7.3 deg Ifpa ? Position angle of the bar
512-517 F6.3 deg e_Ifpa ? Formal fit error in Ifpa
520-525 F6.3 mag/arcsec+2 Hfcs ? Central surface brightness of the disk
528-533 F6.3 mag/arcsec+2 e_Hfcs ? Formal fit error in Hfcs (real
uncertainty in general much larger)
535-541 F7.3 arcsec Hfsc ? Scale length of disk
544-549 F6.3 arcsec e_Hfsc ? Formal fit error in Hfsc
552-557 F6.3 mag/arcsec+2 Hfes ? Central! (not effective) surface
brightness of bulge
560-565 F6.3 mag/arcsec+2 e_Hfes ? Formal fit error in Hfes
568-573 F6.3 arcsec Hfer ? Bulge scale length (not effective radius)
576-581 F6.3 arcsec e_Hfer ? Formal fit error in Hfer
584-589 F6.3 mag/arcsec+2 Hfbc ? Central brightness of the bar
592-597 F6.3 arcsec e_Hfbc ? Formal fit error in Hfbc
600-605 F6.3 arcsec Hfma ? Bar major axis
608-613 F6.3 arcsec e_Hfma ? Formal fit error in Hfma
616-621 F6.3 arcsec Hfmi ? Bar minor axis
624-629 F6.3 arcsec e_Hfmi ? Formal fit error in Hfmi
631-637 F7.3 deg Hfpa ? Position angle of the bar
640-645 F6.3 deg e_Hfpa ? Formal fit error in Hfpa
648-653 F6.3 mag/arcsec+2 Kfcs ? Central surface brightness of the disk
656-661 F6.3 mag/arcsec+2 e_Kfcs ? Formal fit error in Kfcs (real
uncertainty in general much larger)
664-669 F6.3 arcsec Kfsc ? Scale length of disk
672-677 F6.3 arcsec e_Kfsc ? Formal fit error in Kfsc
680-685 F6.3 mag/arcsec+2 Kfes ? Central! (not effective) surface
brightness of bulge
688-693 F6.3 mag/arcsec+2 e_Kfes ? Formal fit error in Kfes
696-701 F6.3 arcsec Kfer ? Bulge scale length (not effective radius)
704-709 F6.3 arcsec e_Kfer ? Formal fit error in Kfer
712-717 F6.3 mag/arcsec+2 Kfbc ? Central brightness of the bar
720-725 F6.3 mag/arcsec+2 e_Kfbc ? Formal fit error in Kfbc
728-733 F6.3 arcsec Kfma ? Bar major axis
736-741 F6.3 arcsec e_Kfma ? Formal fit error in Kfma
744-749 F6.3 arcsec Kfmi ? Bar minor axis
752-757 F6.3 arcsec e_Kfmi ? Formal fit error in Kfmi
759-765 F7.3 deg Kfpa ? Position angle of the bar
768-773 F6.3 deg e_Kfpa ? Formal fit error in Kfpa
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tableqf
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- UGC [1/12921] Name of galaxy in UGC VII/26
8- 13 F6.3 mag/arcsec+2 Bfcs ? Central surface brightness of the disk
16- 21 F6.3 mag/arcsec+2 e_Bfcs ? Fit error due to sky uncertainties in Bfcs
23- 29 F7.3 arcsec Bfsc ? Scale length of disk
32- 37 F6.3 arcsec e_Bfsc ? Fit error due to sky uncertainties in Bfsc
40- 45 F6.3 mag/arcsec+2 Bfes ? Effective surface brightness of bulge
48- 53 F6.3 mag/arcsec+2 e_Bfes ? Fit error due to sky uncertainties in Bfes
55- 61 F7.3 arcsec Bfer ? Effective radius of the bulge
62- 69 F8.3 arcsec e_Bfer ? Fit error due to sky uncertainties in Bfer
72- 77 F6.3 mag/arcsec+2 Vfcs ? Central surface brightness of the disk
80- 85 F6.3 mag/arcsec+2 e_Vfcs ? Fit error due to sky uncertainties in Vfcs
88- 93 F6.3 arcsec Vfsc ? Scale length of disk
96-101 F6.3 arcsec e_Vfsc ? Fit error due to sky uncertainties in Vfsc
104-109 F6.3 mag/arcsec+2 Vfes ? Effective surface brightness of bulge
112-117 F6.3 mag/arcsec+2 e_Vfes ? Fit error due to sky uncertainties in Vfes
119-125 F7.3 arcsec Vfer ? Effective radius of the bulge
127-133 F7.3 arcsec e_Vfer ? Fit error due to sky uncertainties in Vfer
136-141 F6.3 mag/arcsec+2 Rfcs ? Central surface brightness of the disk
144-149 F6.3 mag/arcsec+2 e_Rfcs ? Fit error due to sky uncertainties in Rfcs
152-157 F6.3 arcsec Rfsc ? Scale length of disk
160-165 F6.3 arcsec e_Rfsc ? Fit error due to sky uncertainties in Rfsc
168-173 F6.3 mag/arcsec+2 Rfes ? Effective surface brightness of bulge
176-181 F6.3 mag/arcsec+2 e_Rfes ? Fit error due to sky uncertainties in Rfes
183-189 F7.3 arcsec Rfer ? Effective radius of the bulge
191-197 F7.3 arcsec e_Rfer ? Fit error due to sky uncertainties in Rfer
200-205 F6.3 mag/arcsec+2 Ifcs ? Central surface brightness of the disk
208-213 F6.3 mag/arcsec+2 e_Ifcs ? Fit error due to sky uncertainties in Ifcs
215-221 F7.3 arcsec Ifsc ? Scale length of disk
224-229 F6.3 arcsec e_Ifsc ? Fit error due to sky uncertainties in Ifsc
232-237 F6.3 mag/arcsec+2 Ifes ? Effective surface brightness of bulge
240-245 F6.3 mag/arcsec+2 e_Ifes ? Fit error due to sky uncertainties in Ifes
247-253 F7.3 arcsec Ifer ? Effective radius of the bulge
255-261 F7.3 arcsec e_Ifer ? Fit error due to sky uncertainties in Ifer
264-269 F6.3 mag/arcsec+2 Hfcs ? Central surface brightness of the disk
272-277 F6.3 mag/arcsec+2 e_Hfcs ? Fit error due to sky uncertainties in Hfcs
279-285 F7.3 arcsec Hfsc ? Scale length of disk
287-293 F7.3 arcsec e_Hfsc ? Fit error due to sky uncertainties in Hfsc
296-301 F6.3 mag/arcsec+2 Hfes ? Effective surface brightness of bulge
304-309 F6.3 mag/arcsec+2 e_Hfes ? Fit error due to sky uncertainties in Hfes
311-318 F8.3 arcsec Hfer ? Effective radius of the bulge
320-327 F8.3 arcsec e_Hfer ? Fit error due to sky uncertainties in Hfer
330-335 F6.3 mag/arcsec+2 Kfcs ? Central surface brightness of the disk
338-343 F6.3 mag/arcsec+2 e_Kfcs ? Fit error due to sky uncertainties in Kfcs
346-351 F6.3 arcsec Kfsc ? Scale length of disk
353-359 F7.3 arcsec e_Kfsc ? Fit error due to sky uncertainties in Kfsc
362-367 F6.3 mag/arcsec+2 Kfes ? Effective surface brightness of bulge
369-375 F7.3 mag/arcsec+2 e_Kfes ? Fit error due to sky uncertainties in Kfes
377-383 F7.3 arcsec Kfer ? Effective radius of the bulge
385-391 F7.3 arcsec e_Kfer ? Fit error due to sky uncertainties in Kfer
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Byte-by-byte Description of file: tableff tableef
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- UGC [1/12921] Name of galaxy in UGC VII/26
8- 13 F6.3 mag/arcsec+2 Bfcs ? Central surface brightness of the disk
16- 21 F6.3 mag/arcsec+2 e_Bfcs ? Fit error due to sky uncertainties in Bfcs
23- 29 F7.3 arcsec Bfsc ? Scale length of disk
32- 37 F6.3 arcsec e_Bfsc ? Fit error due to sky uncertainties in Bfsc
40- 45 F6.3 mag/arcsec+2 Bfes ? Central! (not effective) surface
brightness of bulge (1)
48- 53 F6.3 mag/arcsec+2 e_Bfes ? Fit error due to sky uncertainties in Bfes
55- 61 F7.3 arcsec Bfer ? Bulge scale length (not eff. radius) (2)
62- 69 F8.3 arcsec e_Bfer ? Fit error due to sky uncertainties in Bfer
72- 77 F6.3 mag/arcsec+2 Vfcs ? Central surface brightness of the disk
80- 85 F6.3 mag/arcsec+2 e_Vfcs ? Fit error due to sky uncertainties in Vfcs
88- 93 F6.3 arcsec Vfsc ? Scale length of disk
96-101 F6.3 arcsec e_Vfsc ? Fit error due to sky uncertainties in Vfsc
104-109 F6.3 mag/arcsec+2 Vfes ? Central! (not effective) surface
brightness of bulge (1)
112-117 F6.3 mag/arcsec+2 e_Vfes ? Fit error due to sky uncertainties in Vfes
119-125 F7.3 arcsec Vfer ? Bulge scale length (not eff. radius) (2)
127-133 F7.3 arcsec e_Vfer ? Fit error due to sky uncertainties in Vfer
136-141 F6.3 mag/arcsec+2 Rfcs ? Central surface brightness of the disk
144-149 F6.3 mag/arcsec+2 e_Rfcs ? Fit error due to sky uncertainties in Rfcs
151-157 F7.3 arcsec Rfsc ? Scale length of disk
160-165 F6.3 arcsec e_Rfsc ? Fit error due to sky uncertainties in Rfsc
168-173 F6.3 mag/arcsec+2 Rfes ? Central! (not effective) surface
brightness of bulge (1)
176-181 F6.3 mag/arcsec+2 e_Rfes ? Fit error due to sky uncertainties in Rfes
183-189 F7.3 arcsec Rfer ? Bulge scale length (not eff. radius) (2)
191-197 F7.3 arcsec e_Rfer ? Fit error due to sky uncertainties in Rfer
200-205 F6.3 mag/arcsec+2 Ifcs ? Central surface brightness of the disk
208-213 F6.3 mag/arcsec+2 e_Ifcs ? Fit error due to sky uncertainties in Ifcs
215-221 F7.3 arcsec Ifsc ? Scale length of disk
224-229 F6.3 arcsec e_Ifsc ? Fit error due to sky uncertainties in Ifsc
232-237 F6.3 mag/arcsec+2 Ifes ? Central! (not effective) surface
brightness of bulge (1)
240-245 F6.3 mag/arcsec+2 e_Ifes ? Fit error due to sky uncertainties in Ifes
247-253 F7.3 arcsec Ifer ? Bulge scale length (not eff. radius) (2)
255-261 F7.3 arcsec e_Ifer ? Fit error due to sky uncertainties in Ifer
264-269 F6.3 mag/arcsec+2 Hfcs ? Central surface brightness of the disk
272-277 F6.3 mag/arcsec+2 e_Hfcs ? Fit error due to sky uncertainties in Hfcs
279-285 F7.3 arcsec Hfsc ? Scale length of disk
287-293 F7.3 arcsec e_Hfsc ? Fit error due to sky uncertainties in Hfsc
296-301 F6.3 mag/arcsec+2 Hfes ? Central! (not effective) surface
brightness of bulge (1)
304-309 F6.3 mag/arcsec+2 e_Hfes ? Fit error due to sky uncertainties in Hfes
311-318 F8.3 arcsec Hfer ? Bulge scale length (not eff. radius) (2)
320-327 F8.3 arcsec e_Hfer ? Fit error due to sky uncertainties in Hfer
330-335 F6.3 mag/arcsec+2 Kfcs ? Central surface brightness of the disk
338-343 F6.3 mag/arcsec+2 e_Kfcs ? Fit error due to sky uncertainties in Kfcs
346-351 F6.3 arcsec Kfsc ? Scale length of disk
353-359 F7.3 arcsec e_Kfsc ? Fit error due to sky uncertainties in Kfsc
362-367 F6.3 mag/arcsec+2 Kfes ? Central! (not effective) surface
brightness of bulge (1)
369-375 F7.3 mag/arcsec+2 e_Kfes ? Fit error due to sky uncertainties in Kfes
377-383 F7.3 arcsec Kfer ? Bulge scale length (not eff. radius) (2)
385-391 F7.3 arcsec e_Kfer ? Fit error due to sky uncertainties in Kfer
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Note (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
Note (2): tableef: multiply by 1.679 to get effective radius
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Courtesy: Roelof de Jong
(End) Patricia Bauer [CDS] 18-Jun-1996