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J/A+A/309/749 Fundamental plane of early type galaxies (Prugniel 1996)
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The fundamental plane of early-type galaxies: stellar populations and
mass-to-light ratio
Prugniel P., Simien F.
<Astron. Astrophys. 309, 749 (1996)>
=1996A&A...309..749P (SIMBAD/NED BibCode)
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ADC_Keywords: Galaxies, optical; Galactic plane; Populations, stellar
Keywords: galaxies: elliptical & lenticular, cD -
galaxies: fundamental parameters - galaxies: photometry -
galaxies: kinematics and dynamics
Abstract:
We analyse the residuals to the fundamental plane (FP) of elliptical
galaxies as a function of stellar-population indicators; these are
based on the line-strength parameter Mg2 and on UBVRI broad-band
colors, and are partly derived from new observations. The effect of
the stellar populations accounts for approximately half the observed
variation of the mass-to-light ratio responsible for the FP tilt. The
residual tilt can be explained by the contribution of two additional
effects: the dependence of the rotational support, and possibly that
of the spatial structure, on the luminosity.
We conclude to a constancy of the dynamical-to-stellar mass ratio.
This probably extends to globular clusters as well, but the dominant
factor would be here the luminosity dependence of the structure rather
than that of the stellar population. This result also implies a
constancy of the fraction of dark matter over all the scalelength
covered by stellar systems. Our compilation of internal stellar
kinematics of galaxies is appended.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 95 3147 Catalogue of central velocity
dispersion
tablea2.dat 48 883 Catalogue of maximum velocity
of rotation
tablea3.dat 165 287 Bibliographic references for
tablea1 and tablea2
tableb1.dat 72 427 Fundamental parameters for
the galaxies in the sample
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See also:
http://www-obs.univ-lyon1.fr/~prugniel/cgi-bin/hypercat/ :
the HYPERCAT database
J/A+AS/128/299 : Prugniel & Heraudeau, 1998, Photometry of galaxies
J/A+AS/127/117 : Prugniel et al., 1998, Kinematics of galaxies
J/A+AS/132/255 : A catalogue of Mg_2_ indices (Golev+ 1998)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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2- 12 A11 --- Name Galaxy identifier (1)
14- 15 I2 h RAh ? Right Ascension 1950 (hours)
16- 17 I2 min RAm ? Right Ascension 1950 (min)
18- 21 F4.1 s RAs ? Right Ascension 1950 (sec)
22 A1 --- DE- [+-] Sign of declination
23- 24 I2 deg DEd ? Declination 1950 (degrees)
25- 26 I2 arcmin DEm ? Declination 1950 (minutes)
27- 28 I2 arcsec DEs ? Declination 1950 (seconds)
30- 32 I3 km/s sigmam ? Adopted central velocity dispersion (2)
36 A1 --- l_sigma ? Upper (<) or lower (>) limit
37- 41 F5.1 km/s sigma Central velocity dispersion (raw) (3)
42- 46 F5.1 km/s e_sigma ? Mean error on sigma
49- 55 A7 --- Ref_a Acronym of the source reference (4)
57- 59 I3 --- Ref_c Numerical code of the source ref (5)
61 I1 --- Reject ? [1 ] Rejection flag, 1=rejected
63- 95 A33 --- Note Descriptive note or alternative name
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Note (1): The Name has been adopted by descending the hierarchy:
(1) Usual name for the dwarf spheroidal galaxy and the Milky Way,
(2) NGC name,
(3) IC,
(4) UGC or ESO,
(5) PGC (Principal Galaxies Catalogue)
(6) LEDA (Lyon- Meudon Extragalactic Database) internal identifier.
For about 50 object left unfolted into this hierarchy we kept the
designation from the original reference. When Name differed from the
original designation, the latter is indicated in the field Note.
Note (2): The velocity dispersions reported here are from absorption lines,
except for Milky Way and the dwarf spheroidal galaxy: from individual
stellar velocity, and for the references Hui93 (Hui, X. 1993) and
Arna+94 (Arnaboldi et al., 1994): from planetary nebulae.
Note (3): sigmam is a mean of the re-scaled measured velocity dispersion,
(sigma) weighted by the inverse of the squared mean error (e_sigma).
The scaling factors are listed in tablea3.dat (scale).
Note (4): Refers to tablea3.dat
Note (5): Refers to tablea3.dat
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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2- 12 A11 --- Name Galaxy identifier (1)
14- 15 A2 --- Axis [MJ MI PA] Axis used for rotation measure (2)
17- 31 A15 --- Note Note on the galaxy
33- 33 A1 --- l_Vmax ? Upper (<) or lower (>) limit
34- 36 I3 km/s Vmax ? Maximum velocity of Rotation
38- 40 I3 km/s e_Vmax ? Mean error on Vmax
42- 58 A17 --- Ref_a Acronym of the source reference (3)
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Note (1): See tablea1.dat
Note (2): Indicate the axis along which the rotation has been measured,
coded as follow:
MJ: Major axis
MI: Minor axis
PA: Pair axis, for binary galaxies
Note (3): Refers to tablea3.dat
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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2- 4 I3 --- Ref_c Numerical code of the source ref (1)
6- 12 A7 --- Ref_a Acronym of the source reference
13- 17 F5.3 --- Scale ? Scaling factor to be applied (2)
19-165 A147 --- Ref Full text of the reference
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Note (1): References codes in the range [1-138] are present in McElroy 1995
(1995ApJS..100..105M); numbers in the range [201-351] are not;
reference 500 gathers new unpublished measurements from
Observatoire de Haute-Provence observations
Note (2): The raw measurement of the velocity dispersion (sigma in tablea1)
has to be multiplied by the scaling factor Scale to convert it in a
homogeneous scale.
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Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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2- 12 A11 --- Name Galaxy identifier (1)
14- 14 I1 --- SSample [1-6] Sub-sample
16- 20 F5.2 mag Dmod Distance modulus
22- 26 F5.2 mag Bt Total apparent B magnitude (2)
28- 32 F5.2 mag/arcsec2 mue Mean B surface brightness with r_e (3)
33- 37 F5.2 mag U-B ?=9.99 U-B color within r_e, corrected (4)
39- 42 F4.2 mag B-V ?=9.99 B-V color within r_e, corrected (5)
44- 47 F4.2 mag V-R ?=9.99 V-R color within r_e, corrected (6)
49- 52 F4.2 mag V-I ?=9.99 V-I color within r_e, corrected (7)
54- 58 F5.3 mag Mg2 ?=9.999 Mg2 index
60- 62 I3 km/s sigmam Adopted central velocity dispersion (8)
64- 66 I3 km/s Vmax ?=999 Maximum velocity of rotation, (9)
68- 72 F5.2 --- Rfp Residual from the Fundamental Plane
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Note (1): See tablea1.
Note (2): Corrected for galactic absorption (Burstein & Heiles) and k.
Note (3): Mean B surface brightness within the effective circular aperture.
Corrected for galactic absorption (Burstein & Heiles), k and
cosmologic (1+z)**4 dimming.
Note (4): corrected for Galactic absorption with: E(U-B)=0.20 Ab
k-corrected with: (U-B)corr=(U-B)raw+0.055*velocity[km/s]*1.e-4
Note (5): corrected for Galactic absorption with: E(B-V)=0.25 Ab
k-corrected with: (B-V)corr=(B-V)raw+0.095*velocity[km/s]*1.e-4
Note (6): corrected for Galactic absorption with: E(V-R)=0.20 Ab
k-corrected with: (V-R)corr=(V-R)raw+0.030*velocity[km/s]*1.e-4
Note (7): corrected for Galactic absorption with: E(V-I)=0.35 Ab
k-corrected with: (V-I)corr=(V-I)raw+0.030*velocity[km/s]*1.e-4
Note (8): average weighted by the inverse square error of the re-scaled
measurements
Note (9): average weighted by the inverse square error of the MJ measurements
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Courtesy: P. Prugniel, <prugniel@cumulus.univ-lyon1.fr>
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(End) Patricia Bauer [CDS] 12-Jan-1996