J/MNRAS/433/L30 Velocity gradient and brightness in disc galaxies (Lelli+ 2013)
A scaling relation for disc galaxies: circular-velocity gradient versus central
surface brightness.
Lelli F., Fraternali F., Verheijen M.
<Mon. Not. R. Astron. Soc., 433, L30-L34 (2013)>
=2013MNRAS.433L..30L 2013MNRAS.433L..30L
ADC_Keywords: Galaxies, rotation
Keywords: galaxies: kinematics and dynamics - galaxies: structure - dark matter
Abstract:
For disc galaxies, a close relation exists between the distribution of
light and the shape of the rotation curve. We quantify this relation
by measuring the inner circular-velocity gradient dRV(0) for spiral
and irregular galaxies with high-quality rotation curves. We find that
dRV(0) correlates with the central surface brightness µ0 over
more than two orders of magnitude in dRV(0) and four orders of
magnitudes in µ0. This is a scaling relation for disc galaxies.
It shows that the central stellar density of a galaxy closely relates
to the inner shape of the potential well, also for low-luminosity and
low-surface-brightness galaxies that are expected to be dominated by
dark matter.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 87 74 Galaxy sample used
refs.dat 93 21 References
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See also:
VII/145 : Nearby Galaxies Catalogue (NBG) (Tully 1988)
VII/198 : Mark III Catalog of Galaxy Peculiar Velocities (Willick+ 1997)
J/AJ/138/332 : LEDA CMD/tip of the red giant branch (Jacobs+, 2009)
J/AJ/112/2471 : The Ursa Major cluster. I. (Tully+ 1996)
J/A+A/390/863 : CCD R Photometry of WHISP Dwarf Galaxies (Swaters, 2002)
J/ApJ/703/1569 : Radial distribution in SINGS galaxies. I. (Munoz-Mateos+ 2009)
J/A+A/370/765 : HI synthesis observations in UMa cluster (Verheijen+, 2001)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Galaxy name
11- 17 A7 --- Type Morphological type
19- 22 F4.1 Mpc Dist Distance
24- 27 F4.1 Mpc e_Dist rms uncertainty on Dist
29- 35 A7 --- Met Method used for distance determination (1)
37- 38 I2 deg i [0/90] Inclination
40 I1 deg e_i rms uncertainty on Inclination
42- 45 F4.1 mag/arcsec2 SuBr0 ?=- R-band surface brightness
47- 49 F3.1 mag/arcsec2 e_SuBr0 ?=- rms uncertainty on SuBr0
51- 53 I3 km/s Vmax Maximum velocity
55- 56 I2 km/s e_Vmax rms uncertainty on Vmax
58- 61 I4 km/s/kpc dRV(0) ?=- Circular-velocity gradient
63- 66 I4 km/s/kpc e_dRV(0) ?=- rms uncertainty on dRV(0)
68- 71 F4.1 kpc R90 Radius where the rotation curve reaches
90% of its maximum velocity
73- 74 I2 --- m [1/10]?=- Best fitting polynomial order
76- 79 F4.2 --- chi2nu ?=- χ2 value (per d.o.f.)
81 A1 --- r_Dist Dist reference, in refs.dat file
82 A1 --- --- [,]
84 A1 --- r_SuBr0 SuBr0R reference, in refs.dat file
85 A1 --- --- [,]
87 A1 --- r_dRV(0) dRV(0) reference, in refs.dat file
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Note (1): Methods as follows:
TF = Tully-Fischer relation
TRGB = tip of the red giant branch
Ceph = Cepheids
Cluster = cluster distance
Vflow = Hubble flow
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1 A1 --- Ref reference code
3- 21 A19 --- BibCode BibCode
23- 50 A28 --- Aut Author's name
51- 93 A43 --- Com Comments
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Jul-2014