J/A+A/697/A38 CS4G Disc Galaxy Extension (Sanchez-Alarcon+, 2025)
The Complete Spitzer Survey of Stellar Structure in Galaxies (CS4G).
Sanchez-Alarcon P.M., Salo H., Knapen J.H., Comeron S., Roman J.,
Watkins A.E., Buta R.J., Laine S., Falcon-Ramirez J.M., Anetjaervi M.,
Athanassoula E., Bosma A., Gadotti D.A., Hinz J.L., Ho L.C., Holwerda B.W.,
Janz J., Kim T., Koda J., Laine J., Laurikainen E., Madore B.F.,
Menendez-Delmestre K., Peletier R.F., Querejeta M., Ruokanen A., Sheth K.,
Zaritsky D.
<Astron. Astrophys. 697, A38 (2025)>
=2025A&A...697A..38S 2025A&A...697A..38S (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Galaxies, IR ; Photometry, infrared ; Optical
Morphology ; Radial velocities ; Rotational velocities
Keywords: catalogs - surveys - galaxies: general - galaxies: photometry -
galaxies: stellar content - galaxies: structure -
Abstract:
The Spitzer Survey of Stellar Structure in Galaxies (S4G) together
with its Early Type Galaxy (ETG) extension stands as the mostextensive
dataset of deep, uniform mid-infrared (MIR, 3.6 and 4.5um) imaging for
a sample of 2817 nearby (<40Mpc) galaxies. The velocity criterion used
to select the original sample results in an additional 422 galaxies
without HI detection that ought to have been included in the S4G on
the basis of their optical recession velocities.
In order to create a complete magnitude, size and volume-limited
sample of nearby galaxies we collect 3.6um and i-band images using
archival data from different surveys and complete it with new
observations for the missing galaxies. We present the Complete Spitzer
Survey of Stellar Structure in Galaxies (CS4G), encompassing a sample
of 3239 galaxies with consistent imaging, surface brightness profiles
and photometric parameters.
Following the original strategy of the survey, we produce masks,
surface brightness profiles, and curves of growth using reduced and
masked 3.6um and i-band images. From these profiles, we derive the
integrated quantities: total magnitude, stellar mass, concentration
parameter, and galaxy size. We derive a recipe for the conversion
between optical i-band and 3.6um. We present new morphological revised
T-types and we showcase mid-IR scaling relations for the stellar mass,
galaxy size, concentration index, and morphological type.
We improve the masking procedure and increase the number of pixels
masked out by a factor of five improving the masking of fainter
regions over previous S4G data. Our photometric parameters from i-band
imaging yield consistent measurements with the original sample (S4G)
and its ETG extension in the 3.6um band. The new Disc Galaxy (DG)
extension consists of galaxies with a wide morphological range
(-5<THL<10 according to HyperLeda) and a mass range of
6<log(M*/M☉)<11. The galaxies in the DG sample have an average
mass of log(M*/M☉)=9.21, an average galaxy isophotal radius at
25.5mag/arcsec2 of R25.5=7.1kpc, and an average concentration
index of C82=2.92.
We complete the S4G sample by incorporating 422 galaxies into the
original dataset. Our revised classification based on 3.6um and i-band
imaging suggests that many galaxies in the DG sample are ellipticals
(T←4 for 29 galaxies). The new galaxies constitutes 15% of the total
previous sample (S4G+ETG), but in the lower-mass bin
(M*<109M☉), the disc galaxy extension increases the sample by
30%. The CS4G includes at least 99.94% of the complete sample of
nearby galaxies. We make the images and surface brightness profiles
available to the community together with the conjunct catalogue of the
whole CS4G dataset with consistent photometric measurements for 3239
galaxies. The CS4G will enable a wide set of investigations into
galaxy structure and evolution, and complement optical, near-infrared
and MIR imaging to be obtained in coming years with Euclid, Rubin,
Roman and other research projects.
Description:
Mosaic science images, mask images, surface brightness radial profiles
and photometric parameters for the 422 disc galaxies are presented.
The main table of the photometric parameters of the CS4G sample also
incorporates the parameters from the S4G and the ETG extension. Each
galaxy has a directory inside galaxies. The mosaic images are stored
in P1 directory, mask images in the P2 directory, and surface
brightness profiles (dynamic and fixed) in the P3 directory.
Additionally, we include the CVRHS morphological classifications for
all the new galaxies, following Buta et al. (2015ApJS..217...32B 2015ApJS..217...32B,
Cat. J/ApJS/217/32).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
catalog.dat 1829 3239 *CS4G catalogue
cs4g.fits 2880 1238 fits version of CS4G catalogue
galaxies/* . 422 Directory containing all data products for the
422 new galaxies
--------------------------------------------------------------------------------
Note on catalog.dat: Values without measurements are denoted with -999.
Bands 1 and 2 refer to the 3.6 and 4.5um bands of Spitzer.
Bands 3 refer to the i-band. Converted 3.6um parameters for the DG extension
are stored in Band 1.
--------------------------------------------------------------------------------
See also:
J/PASP/122/1397 : Spitzer Survey of Stellar Structure in Galaxies (Sheth+ 2010)
J/A+A/569/A91 : Optical imaging for S4G (Knapen+, 2014)
J/ApJS/219/4 : S4G pipeline 4: multi-component decompositions (Salo+, 2015)
J/ApJS/217/32 : S4G galaxy morphologies in the CVRHS system (Buta+, 2015)
J/A+A/660/A69 : S4G extension for nearby early-type galaxies (Watkins+, 2022)
https://www.ipac.caltech.edu/doi/irsa/10.26131/IRSA425 : S4G Dataset DOI
https://irsa.ipac.caltech.edu/data/SPITZER/S4G/galaxies :
IRSA webpage containing all data for the S4G galaxies
Description of file: galaxies/*/P3/*profile.fits
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 20 F20.16 pix sma Semi-major axis length (pixel)
22- 46 F25.20 --- intens Mean isophotal intensity
48- 69 F22.19 --- int_err Error in isophotal intensity
(RMS / sqrt(NDATA))
71- 95 F25.19 --- pix_var Estimate of pixel variance
(RMS * sqrt(SAREA))
97-117 F21.18 --- rms Root-mean-square scatter around isophotal
intensity
119-137 F19.17 --- ellip Ellipticity
139-159 F21.19 --- ellip_err Ellipticity error
161-178 F18.14 deg pa Position angle (degrees counterclockwise
from +y)
180-200 F21.19 deg pa_err Position angle error
202-208 F7.3 pix x0 Ellipse X center (pixel)
210-231 F22.18 pix x0_err Error of X center (pixel)
233-239 F7.3 pix y0 Ellipse Y center (pixel)
241-262 F22.18 pix y0_err Error of Y center (pixel)
264-287 E24.17 --- grad Local radial intensity gradient
289-309 E21.16 --- grad_error Gradient error
311-332 F22.17 --- gradrerror Gradient relative error
334-353 F20.14 --- tflux_e Total flux enclosed by ellipse
355-374 F20.14 --- tflux_c Total flux enclosed by circle
376-380 I5 --- npix_e Total number of valid pixels inside ellipse
382-386 I5 --- npix_c Total number of valid pixels inside circle
388-410 F23.20 --- a3 3rd harmonic deviations from ellipse
412-434 F23.18 --- a3_err 3rd harmonic deviation errors
436-457 E22.16 --- b3 3rd harmonic deviations from ellipse
459-483 F25.19 --- b3_err 3rd harmonic deviation errors
485-506 E22.16 --- a4 4th harmonic deviations from ellipse
508-531 F24.19 --- a4_err 4th harmonic deviation errors
533-556 F24.20 --- b4 4th harmonic deviations from ellipse
558-580 F23.18 --- b4_err 4th harmonic deviation errors
582-584 I3 --- ndata Number of valid data points on isophote
586-588 I3 --- nflag Number of flagged data points on isophote
590-591 I2 --- niter Number of iterations
593-593 I1 --- stop_code Stop condition code
595-597 F3.1 pix sarea Average sector area on isophote (pixel)
--------------------------------------------------------------------------------
Notes: Surface brightness profiles for all the galaxies in the sample. For each
isophote, the parameters of the elliptical regions are fitted.
--------------------------------------------------------------------------------
Description of file: galaxies/name/P3/*fx2a.fits
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 F19.15 arcsec radius Semi-major axis on arcseconds?
21- 42 F22.18 counts intensity Mean intensity inside the ellipse
44- 65 F22.19 counts intensity_err Error on the mean intensity
(RMS / sqrt(NDATA))
67- 86 F20.14 counts flux Total flux enclosed by ellipse
88-105 F18.15 counts flux_err Error on total flux.
107-113 F7.1 npixels Number of valid pixels inside the ellipse
115-131 F17.14 deg pa Position angle
133-135 F3.1 deg pa_err Error on position angle
137-154 F18.16 eps Ellipticity
156-158 F3.1 eps_err Ellipticity error
160-164 F5.1 pix x Ellipse X center (pixel)
166-170 F5.1 pix y Ellipse Y center (pixel)
--------------------------------------------------------------------------------
Notes: Fixed surface brightness profiles spaced by 2 arcseconds for all the
galaxies in the sample. The parameters of the elliptical regions are
fixed.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: catalog.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 23 A23 --- Object Galaxy ID (object)
25- 39 F15.11 deg RAdeg Right Ascension (J2000) (ra)
41- 55 F15.11 deg DEdeg Declination (J2000) (dec)
57- 76 F20.15 arcsec sma1-25p5 ?=-999 Semi major axis at
25.5mag/arcsec2 in the
3.6um band (AB) (sma1_25p5)
78- 100 F23.18 deg pa1-25p5 ?=-999 Position angle at
25.5mag/arcsec2 in the
3.6um band (AB) (pa1_25p5)
102- 125 F24.19 --- ellip1-25p5 ?=-999 Ellipticity at
25.5mag/arcsec2 in the
3.6um band (AB) (ellip1_25p5)
127- 146 F20.15 arcsec sma1-26p5 ?=-999 Semi major axis at
26.5mag/arcsec2 in the
3.6um band (AB) (sma1_26p5)
148- 170 F23.18 deg pa1-26p5 ?=-999 Position angle at
26.5mag/arcsec2 in the
3.6um band (AB) (pa1_26p5)
172- 195 F24.19 --- ellip1-26p5 ?=-999 Ellipticity at
26.5mag/arcsec2 in the
3.6um band (AB) (ellip1_26p5)
197- 216 F20.15 arcsec sma2-25p5 ?=-999 Semi major axis at
25.5mag/arcsec2 in the
4.5um band (AB) (sma2_25p5)
218- 240 F23.18 deg pa2-25p5 ?=-999 Position angle at
25.5mag/arcsec2 in the
4.5um band (AB) (pa2_25p5)
242- 264 F23.18 --- ellip2-25p5 ?=-999 Ellipticity at
25.5mag/arcsec2 in the
4.5um band (AB) (ellip2_25p5)
266- 285 F20.15 arcsec sma2-26p5 ?=-999 Semi major axis at
26.5mag/arcsec2 in the
4.5um band (AB) (sma2_26p5)
287- 308 F22.17 deg pa2-26p5 ?=-999 Position angle at
26.5mag/arcsec2 in the
4.5um band (AB) (pa2_26p5)
310- 332 F23.18 --- ellip2-26p5 ?=-999 Ellipticity at
26.5mag/arcsec2 in the
4.5um band (ellip2_26p5)
334- 354 F21.16 mag mag1 ?=-999 Asymptotic integrated magnitude
at 3.6um (AB) (mag1)
356- 377 F22.17 mag e_mag1 ?=-999 Error on the integrate
magnitude in the 3.6um (AB) (emag1)
379- 398 F20.15 mag mag2 ?=-999 Asymptotic integrate magnitude
at 4.5um (AB) (mag2)
400- 422 F23.18 mag e_mag2 ?=-999 Error on the integrate
magnitude at 4.5um (AB) (emag2)
424- 444 F21.16 arcsec re1 ?=-999 Effective radius at 3.6um (AB)
(re1)
446- 466 F21.16 arcsec re2 ?=-999 Effective radius at 4.5um (AB)
(re2)
468- 488 F21.16 arcsec sma1-25p5-c ?=-999 Inclination corrected semi
major axis at 25.5 mag/arcsec2 in
the 3.6um band (AB) (sma125p5corr)
490- 510 F21.16 arcsec sma1-26p5-c ?=-999 Inclination corrected semi
major axis at 26.5 mag/arcsec2 in
the 3.6um band (AB) (sma126p5corr)
512- 532 F21.16 arcsec sma2-25p5-c ?=-999 Inclination corrected semi
major axis at 25.5 mag/arcsec2 in
the 4.5um band (AB) (sma225p5corr)
534- 554 F21.16 arcsec sma2-26p5-c ?=-999 Inclination corrected semi
major axis at 26.5 mag/arcsec2 in
the 4.5um band (AB) (sma226p5corr)
556- 575 F20.15 mag/arcsec2 sb1-eff ?=-999 Surface brightness at the
effective radius in the 3.6um (AB)
(sb1_eff)
577- 596 F20.15 mag/arcsec2 sb1-1kpc ?=-999 Average surface brightness
within 1 kpc at 3.6um (AB) (sb1_1kpc)
598- 617 F20.15 mag/arcsec2 sb2-eff ?=-999 Surface brightness at the
effective radius in the 4.5um (AB)
(sb2_eff)
619- 638 F20.15 mag/arcsec2 sb2-1kpc ?=-999 Average surface brightness
within 1 kpc at 4.5um (AB) (sb2_1kpc)
640- 659 F20.15 MJy/sr sky1 ?=-999 Sky level at 3.6 microns (sky1)
661- 680 F20.15 MJy/sr ssky1 ?=-999 Local, pixel-to-pixel noise at
3.6 microns (ssky1)
682- 701 F20.15 MJy/sr e_sky1 ?=-999 Large scale sky noise at
3.6 microns (esky1)
703- 722 F20.15 MJy/sr sky2 ?=-999 Sky level at 4.5 microns (sky2)
724- 743 F20.15 MJy/sr ssky2 ?=-999 Local, pixel-to-pixel noise at
4.5 microns (ssky2)
745- 764 F20.15 MJy/sr e_sky2 ?=-999 Large scale sky noise at
4.5 microns (esky2)
766- 786 F21.16 --- c31-1 ?=-999 r75/r25 concentration index at
3.6 microns (c31_1)
788- 808 F21.16 --- c82-1 ?=-999 5*log10(r80/r20) concentration
index at 3.6 microns (c82_1)
810- 830 F21.16 --- c31-2 ?=-999 r75/r25 concentration index at
4.5 microns (c31_2)
832- 852 F21.16 --- c82-2 ?=-999 5*log10(r80/r20) concentration
index at 4.5 microns (c82_2)
854- 873 F20.15 mag MAG1 ?=-999 Absolute magnitude at 3.6um
(AB) (mabs1)
875- 894 F20.15 mag MAG2 ?=-999 Absolute magnitude at 4.5um
(AB) (mabs2)
896- 915 F20.15 arcsec sma3-25p5 ?=-999 Semi major axis at
25.5mag/arcsec2 in the i-band (AB)
(sma3_25p5)
917- 936 F20.15 deg pa3-25p5 ?=-999 Position angle at
25.5mag/arcsec2 in the i-band (AB)
(pa3_25p5)
938- 957 F20.15 --- ellip3-25p5 ?=-999 Ellipticity at
25.5mag/arcsec2 in the i-band (AB)
(ellip3_25p5)
959- 978 F20.15 arcsec sma3-26p5 ?=-999 Semi major axis at
26.5mag/arcsec2 in the i-band (AB)
(sma3_26p5)
980- 999 F20.15 deg pa3-26p5 ?=-999 Position angle at
26.5mag/arcsec2 in the i-band (AB)
(pa3_26p5)
1001-1020 F20.15 --- ellip3-26p5 ?=-999 Ellipticity at
26.5mag/arcsec2 in the i-band (AB)
(ellip3_26p5)
1022-1041 F20.15 mag mag3 ?=-999 Asymptotic integrated magnitude
in the i-band (AB) (mag3)
1043-1062 F20.15 mag e_mag3 ?=-999 Error on the integrate
magnitude in the i-band (AB) (emag3)
1064-1083 F20.15 arcsec re3 ?=-999 Effective radius in the i-band
(AB) (re3)
1085-1104 F20.15 arcsec sma3-25p5-c ?=-999 Inclination corrected semi
major axis at 25.5 mag/arcsec^2
in the i-band (AB) (sma325p5corr)
1106-1125 F20.15 arcsec sma3-26p5-c ?=-999 Inclination corrected semi
major axis at 26.5 mag/arcsec^2
in the i-band (AB) (sma326p5corr)
1127-1146 F20.15 mag/arcsec2 sb3-eff ?=-999 Surface brightness at the
effective radius in the i-band (AB)
(sb3_eff)
1148-1167 F20.15 mag/arcsec2 sb3-1kpc ?=-999 Average surface brightness
within 1 kpc in the i-band (AB)
(sb3_1kpc)
1169-1188 F20.15 --- sky3 ?=-999 Sky level in the i-band (sky3)
1190-1209 F20.15 --- ssky3 ?=-999 Local, pixel-to-pixel noise in
the i-band (ssky3)
1211-1230 F20.15 --- e_sky3 ?=-999 Large scale sky noise in the
i-band (esky3)
1232-1251 F20.15 --- c31-3 ?=-999 r75/r25 concentration index at
i-band (c31_3)
1253-1272 F20.15 --- c82-3 ?=-999 5*log10(r80/r20) concentration
index at i-band (c82_3)
1274-1293 F20.15 mag MAG3 ?=-999 Absolute magnitude in the
i-band (AB) (mabs3)
1295-1314 F20.15 [Msun] logMstar ?=-999 log10 Stellar mass (mstar)
1316-1335 F20.15 pc Dist ?=-999 Estimated distance (dist)
1337-1342 F6.3 Mpc dstd Standard deviation of the
redshift-independent distances (dstd)
1344-1349 F6.3 Mpc dmin Minimum redshift-independent distance
(dmin)
1351-1357 F7.3 Mpc dmax Maximum redshift-independent distance
(dmax)
1359-1365 F7.3 Mpc dmed Median redshift-independent distance
(dmed)
1367-1368 I2 --- f_Dist [-1/3] Distance flag (flag) (1)
1372-1421 A50 --- CVRHS Revised morphological type (CVRHS)
1423-1428 F6.1 --- CVRHS-t ?=-999 Numerical T-type from the
revised classification (CVRHS_t)
1430-1432 A3 --- Sample [S4G, ETG, DG] Sample of the CS4G
(sample)
1434-1437 A4 --- Survey Instrument or survey of the data
(survey)
-------------------------- PARAMETERS FROM HYPERLEDA --------------------------
1439-1442 A4 --- Type Morphological type (type)
1444 A1 --- Bar [B] Bar presence ("B") (bar)
1446 A1 --- Ring [R] Ring presence ("R") (ring)
1448 A1 --- Multiple [M] Multiple system ("M") (multiple)
1450 A1 --- Compact [CD] Compactness
(C=Compact, D=Diffuse) (compactness)
1452-1456 F5.1 --- T Numerical T-type (t)
1458-1460 F3.1 --- e_T Error on the numerical T-type (e_t)
1462-1465 F4.1 0.1arcmin LC Luminosity class (lc)
1467-1469 F3.1 0.1arcmin e_LC Error on lc (e_lc)
1471-1475 F5.3 --- logd25 Logarithmic axis ratio at the
25mag/arcsec^2 isophote (logd25)
1477-1481 F5.3 --- e_logd25 Error on logd25 (e_logd25)
1483-1487 F5.3 --- logr25 Logarithmic axis ratio at the
25mag/arcsec^2 isophote (logr25)
1489-1493 F5.3 --- e_logr25 Error on logr25 (e_logr25)
1495-1500 F6.2 deg pa Position angle of the major axis (pa)
1502-1507 F6.3 mag/arcsec2 brief Mean effective surface brightness
(brief)
1509-1513 F5.3 mag/arcsec2 e_brief Error on brief (e_brief)
1515-1520 F6.3 mag Btot Total apparent B-band magnitude (bt)
1522-1526 F5.3 mag e_Btot Error on bt (e_bt)
1528-1533 F6.3 mag Itot Total apparent I-band magnitude (it)
1535-1539 F5.3 mag e_Itot Error on it (e_it)
1541-1546 F6.3 mag U-Btot Total apparent corrected U-B color
(ubt)
1548-1552 F5.3 mag B-Vtot Total apparent corrected B-V color
(bvt)
1554-1559 F6.3 mag U-Beff Effective U-B color (ube)
1561-1566 F6.3 mag B-Veff Effective B-V color (bve)
1568-1573 F6.2 km/s Vmaxg Apparent maximum rotation velocity
of gas (vmaxg)
1575-1579 F5.2 km/s e_Vmaxg Error on vmaxg (e_vmaxg)
1581-1586 F6.2 km/s Vdis Central velocity dispersion (vdis)
1588-1592 F5.2 km/s e_Vdis Error on vdis (e_vdis)
1594-1598 F5.3 mag mg2 Central Lick Mg2 index (mg2)
1600-1604 F5.3 mag e_mg2 Error on mg2 (e_mg2)
1606-1611 F6.3 mag m21 21-cm line flux in magnitude (m21)
1613-1617 F5.3 mag e_m21 Error on m21 (e_m21)
1619-1624 F6.3 mag mFIR Far infrared magnitude (mfir)
1626-1631 F6.1 km/s HRV ?=-999 Heliocentric radial velocity
(cz) from radio measurement (vrad)
1633-1636 F4.1 km/s e_HRV ?=0 Error on vrad (e_vrad)
1638-1645 F8.1 km/s Vopt ?=-999 Heliocentric radial velocity
(cz) from optical measurement (vopt)
1647-1651 F5.1 km/s e_Vopt ?=0 Error on vopt (e_vopt)
1653-1660 F8.1 km/s HVmean ?=-999 Mean Heliocentric radial
velocity (cz) (v)
1662-1666 F5.1 km/s e_HVmean ?=0 Error on v (e_v)
1668-1672 F5.3 mag ABg Galactic extinction in the B-band
(ag)
1674-1678 F5.3 mag ABi Internal extinction due to
inclination in B-band (ai)
1680-1683 F4.1 deg Incl Inclination between line of sight
and polar axis of a galaxy (incl)
1685-1688 F4.2 mag a21 21-cm self absorption (a21)
1690-1694 F5.3 --- lambda lambda (lambda)
1696-1700 F5.3 [0.1arcmin] logdc log of apparent corrected diameter
(dc in 0.1 arcmin) (logdc)
1702-1707 F6.3 mag Btotc Total apparent corrected B-magnitude
(btc)
1709-1714 F6.3 mag Utotc Total apparent corrected U-B color
(ubtc)
1716-1721 F6.3 mag B-Vtotc Total apparent corrected B-V color
(bvtc)
1723-1728 F6.3 mag/arcsec2 bri25 Mean surface brightness within
isophote 25 (bri25)
1730-1735 F6.2 km/s Vrot Maximum rotation velocity corrected
for inclination (vrot)
1737-1741 F5.2 km/s e_Vrot Error on vrot (e_vrot)
1743-1748 F6.3 mag m21c Corrected 21-cm line flux in
magnitude (m21c)
1750-1755 F6.3 mag hic 21-cm index btc-m21c in magnitude
(hic)
1757-1764 F8.1 km/s RVlg Radial velocity (cz) with respect to
the Local Group (vlg)
1766-1773 F8.1 km/s RVgsr Radial velocity (cz) with respect to
the GSR (vgsr)
1775-1782 F8.1 km/s RVvir Radial velocity (cz) corrected for
LG infall onto Virgo (vvir)
1784-1791 F8.1 km/s RV3k Radial velocity (cz) with respect to
the CMB radiation (v3k)
1793-1798 F6.3 mag modz Cosmological distance modulus
(from vvir with lambdaCDM) (modz)
1800-1804 F5.3 mag e_modz Error on modz (e_modz)
1806-1811 F6.3 mag mod0 Distance modulus from distance
measurements (mod0)
1813-1817 F5.3 mag e_mod0 Error on mod0 (e_mod0)
1819-1829 F11.6 mag BMAG ?=-999 Absolute B-band magnitude
(mabs)
--------------------------------------------------------------------------------
Note (1): Distance flag as follows:
-1 = No distance available
0 = Redshift-independent mostly from NED
1 = Redshift from NED
2 = Optical velocity from HL
3 = Radio velocity from HL
--------------------------------------------------------------------------------
Acknowledgements:
Pablo M. Sanchez-Alarcon, pmsa.astro(at)gmail.com
References:
Munoz-Mateos et al., 2015ApJS..219....3M 2015ApJS..219....3M,
The Spitzer survey of stellar structure in galaxies (S4G):
stellar masses, sizes, and radial profiles for 2352 nearby galaxies
Querejeta et al., 2015ApJS..219....5Q 2015ApJS..219....5Q,
The Spitzer survey of stellar structure in galaxies (S4G):
precise stellar mass distributions from automated dust correction at 3.6um
(End) Pablo M. Sanchez-Alarcon [IAC], Patricia Vannier [CDS] 05-Mar-2025