J/ApJ/726/108 Dispersion-supported stellar systems (Tollerud+, 2011)
From galaxy clusters to ultra-faint dwarf spheroidals: a fundamental curve
connecting dispersion-supported galaxies to their dark matter halos.
Tollerud E.J., Bullock J.S., Graves G.J., Wolf J.
<Astrophys. J., 726, 108 (2011)>
=2011ApJ...726..108T 2011ApJ...726..108T
ADC_Keywords: Velocity dispersion ; Galaxies, nearby ; Clusters, galaxy
Keywords: dark matter - galaxies: clusters: general - galaxies: dwarf -
galaxies: elliptical and lenticular, cD -
galaxies: fundamental parameters - Local Group
Abstract:
We examine scaling relations of dispersion-supported galaxies over
more than eight orders of magnitude in luminosity by transforming
standard fundamental plane parameters into a space of mass, radius,
and luminosity. The radius variable r1/2 is the deprojected
(three-dimensional) half-light radius, the mass variable M1/2 is the
total gravitating mass within this radius, and L1/2 is half the
luminosity. We find that from ultra-faint dwarf spheroidals to giant
cluster spheroids, dispersion-supported galaxies scatter about a
one-dimensional "fundamental curve" through this MRL space.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 58 260 Key properties of dispersion-supported stellar systems
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See also:
VII/202 : Globular Clusters in the Milky Way (Harris, 1997)
J/ApJ/711/361 : Local Group dE galaxies. II. (Geha+, 2010)
J/MNRAS/397/1748 : Spectroscopic study of Segue 2 (Belokurov+, 2009)
J/ApJ/692/1464 : Spectroscopy of Segue 1 (Geha+, 2009)
J/ApJ/689/913 : Fundamental planes of early-type galaxies (La Barbera+, 2008)
J/MNRAS/389/1924 : Old stellar systems (globulars-ellipticals) (Forbes+, 2008)
J/MNRAS/380/281 : Faint galactic satellites survey (Martin+, 2007)
J/ApJ/638/725 : Fundamental manifold of spheroids (Zaritsky+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Object name
12- 15 F4.2 [km/s] logsig Log of velocity dispersion
17- 21 F5.2 [kpc] logRe Log of 2-D half-light/effective radius
23- 27 F5.2 [kpc] logr1/2 Log of 3-D (deprojected) half-light radius (1)
29- 33 F5.2 [Lsun] logL1/2 Log of V-band half-luminosity
35- 39 F5.2 [Msun] logM1/2 Log of half-light mass (from Eq.1:
M=3σ2r1/2/G)
41- 45 F5.2 [Msun] logMDM ?=-1 Log of corrected/dark half-light mass (2)
47- 50 A4 --- Type Object type (3)
52- 54 I3 --- Nobj ? Number of objects per bin for E-type data set
56- 58 A3 --- Ref Source code (4)
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Note (1): See Section 3.
Note (2): As described in Section 4. A "-1.0" value indicates nominally
consistent with no dark matter mass within the error bars.
Note (3): Object type as follows:
CSph = Cluster Spheroid as described in Zaritsky et al. (2006, J/ApJ/638/725)
E = bright Elliptical galaxy;
dE = dwarf Elliptical;
dSph = local group dwarf spheroidal;
GC = Galactic globular cluster;
UCD = Ultra Compact Dwarf.
Note (4): Reference as follows:
1 = Zaritsky et al. (2006, Cat. J/ApJ/638/725);
2 = Graves et al. (2009ApJ...698.1590G 2009ApJ...698.1590G);
3 = Geha et al. (2003AJ....126.1794G 2003AJ....126.1794G);
4 = Wolf et al. (2010MNRAS.406.1220W 2010MNRAS.406.1220W);
5 = Harris (1996, Cat. VII/195; superseded by VII/202);
6 = Pryor & Meylan (1993ASPC...50..357P 1993ASPC...50..357P);
7 = Mieske et al. (2008A&A...487..921M 2008A&A...487..921M).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 17-Aug-2012