J/ApJ/859/2 Fundamental stellar & halo data for local galaxies (Lapi+, 2018)
Precision scaling relations for disk galaxies in the local universe.
Lapi A., Salucci P., Danese L.
<Astrophys. J., 859, 2-2 (2018)>
=2018ApJ...859....2L 2018ApJ...859....2L (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby; Magnitudes, absolute; Rotational velocities;
Optical
Keywords: dark matter; galaxies: formation; galaxies: kinematics and dynamics;
galaxies: spiral
Abstract:
We build templates of rotation curves as a function of the I-band
luminosity via the mass modeling (by the sum of a thin exponential
disk and a cored halo profile) of suitably normalized, stacked data
from wide samples of local spiral galaxies. We then exploit such
templates to determine fundamental stellar and halo properties for a
sample of about 550 local disk-dominated galaxies with high-quality
measurements of the optical radius Ropt and of the corresponding
rotation velocity Vopt. Specifically, we determine the stellar M*
and halo MH masses, the halo size RH and velocity scale VH, and
the specific angular momenta of the stellar j* and dark matter jH
components. We derive global scaling relationships involving such
stellar and halo properties both for the individual galaxies in our
sample and for their mean within bins; the latter are found to be in
pleasing agreement with previous determinations by independent methods
(e.g., abundance matching techniques, weak-lensing observations, and
individual rotation curve modeling). Remarkably, the size of our
sample and the robustness of our statistical approach allow us to
attain an unprecedented level of precision over an extended range of
mass and velocity scales, with 1σ dispersion around the mean
relationships of less than 0.1dex. We thus set new standard local
relationships that must be reproduced by detailed physical models,
which offer a basis for improving the subgrid recipes in numerical
simulations, that provide a benchmark to gauge independent
observations and check for systematics, and that constitute a basic
step toward the future exploitation of the spiral galaxy population as
a cosmological probe.
Description:
Throughout this work, we adopt the standard flat cosmology (Planck
Collaboration XIII 2016A&A...594A..13P 2016A&A...594A..13P) with round parameter values:
matter density ΩM=0.32, baryon density Ωb=0.05, Hubble
constant H0=100h.km/s/Mpc with h=0.67, and mass variance
σ8=0.83 on a scale of 8h-1.Mpc. Stellar masses and SFRs (or
luminosities) of galaxies are evaluated assuming the Chabrier
(2003PASP..115..763C 2003PASP..115..763C) initial mass function.
We have built templates of rotation curves as a function of luminosity
via the mass modeling (by the sum of a thin exponential disk and a
cored halo profile) of suitably normalized, stacked data from wide
samples of local spiral galaxies (Section 2.1). We have then exploited
such templates to determine fundamental stellar and halo properties
for a sample of about 550 local disk-dominated galaxies (Section 2.2).
The relevant quantities for each galaxy in our sample are summarized
in Table 2.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 41 533 Data sample and relevant quantities
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See also:
VII/34 : ESO/Uppsala Survey of the ESO(B) Atlas (Lauberts 1982)
VI/30 : Plates of the ESO / SERC Sky Survey (Holmberg+ 1974-)
J/A+A/612/L6 : j-M law from dwarf to massive spirals (Posti+, 2018)
J/AJ/152/157 : Mass models for 175 disk galaxies with SPARC (Lelli+, 2016)
J/MNRAS/425/2741 : Parameters of Spiral galaxies from SDSS 7 (Hall+, 2012)
J/MNRAS/417/2347 : Tully-Fisher relation for SDSS galaxies (Reyes+, 2011)
J/ApJS/99/501 : Spiral galaxies rotation curves (Persic+ 1995)
J/ApJS/81/413 : Southern sky survey of 1355 spiral gal. (Mathewson+, 1992)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- ESO ESO identifier (1)
9- 14 F6.2 mag IMag [-23.8/-18.4] Absolute I band magnitude (1)
16- 19 F4.2 [kpc] logRd [0/1] log exponential disk scale-length (2)
21- 24 F4.2 [km/s] logVopt [1.6/2.6] log optical velocity (2)
26- 30 F5.2 [Msun] logM* [7.7/11.8] log stellar mass (2)
32- 35 F4.2 [km/s.kpc] logj* [1.9/3.8] log specific stellar angular
momentum (2)
37- 41 F5.2 [Msun] logMH [10.3/13.3] log Hydrogen mass (2)
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Note (1): Galaxies are sorted in order of brightening I-band magnitudes.
Note (2): Typical statistical uncertainties on the tabulated quantities are of
order: 0.1dex on logRd, 0.03dex on logVopt, 0.12dex on logM*,
0.1dex on logj*, and 0.15dex on logMH.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 03-Apr-2019