J/ApJ/936/9 LEGA-C parameters for 877 galaxies (Van der Wel+, 2022)
The Mass Scale of High-redshift Galaxies: Virial Mass Estimates Calibrated with
Stellar Dynamical Models from LEGA-C.
Van der Wel A., van Houdt J., Bezanson R., Franx M., D'Eugenio F.,
Straatman C., Bell E.F., Muzzin A., Sobral D., Maseda M.V., de Graaff A.,
Holden B.P.
<Astrophys. J., 936, 9 (2022)>
=2022ApJ...936....9V 2022ApJ...936....9V
ADC_Keywords: Galaxies; Spectra, optical; Positional data
Keywords: Galaxy evolution ; Galaxy dynamics ; Scaling relations ; Galaxy
masses
Abstract:
Dynamical models for 673 galaxies at z=0.6-1.0 with spatially resolved
(long-slit) stellar kinematic data from LEGA-C are used to calibrate
virial mass estimates defined as Mvir=Kσ'*,int2R, with Ka
scaling factor, σ'*,int the spatially integrated stellar
velocity second moment from the LEGA-C survey, and R the effective
radius measured from a Sersic profile fit to Hubble Space Telescope
imaging. The sample is representative for M*>3x1010M☉ and
includes all types of galaxies, irrespective of morphology and color.
We demonstrate that using R=Rsma (the semimajor axis length of the
ellipse that encloses 50% of the light) in combination with an
inclination correction on σ'*,int produces an unbiased Mvir.
We confirm the importance of projection effects on σ'*,int by
showing the existence of a similar residual trend between virial mass
estimates and inclination for the nearby early-type galaxies in the
ATLAS3D survey. Also, as previously shown, when using a Sersic
profile-based R estimate, a Sersic index-dependent correction to
account for nonhomology in the radial profiles is required. With
respect to analogous dynamical models for low-redshift galaxies from
the ATLAS3D survey we find a systematic offset of 0.1dex in the
calibrated virial constant for LEGA-C, which may be due to physical
differences between the galaxy samples or an unknown systematic error.
Either way, with our work we establish a common mass scale for
galaxies across 8Gyr of cosmic time with a systematic uncertainty of
at most 0.1dex.
Description:
Spectra have been obtained with the VIMOS instrument on the Very Large
Telescope. With ∼20hr of integration per object, R∼3500 spectra are
produced with a wavelength coverage between ∼6300 and ∼8800AA.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 85 877 *LEGA-C JAM parameters
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Note on table1.dat: All quantities are calculated within spherical
apertures with radius RSersic,sma.
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See also:
J/MNRAS/414/888 : ATLAS3D project. III. (Emsellem+, 2011)
J/ApJS/203/24 : Structural param of galaxies in CANDELS (van der Wel+, 2012)
J/ApJS/206/8 : COSMOS/UltraVISTA Ks-selected catalogs v4.1 (Muzzin+, 2013)
J/ApJ/777/18 : Stellar mass functions of galaxies to z=4 (Muzzin+, 2013)
J/ApJ/771/85 : Dyn masses of z∼2 quiescent galaxies (van de Sande+, 2013)
J/ApJ/788/72 : Observed sample of z∼0.7 massive galaxies (Gallazzi+, 2014)
J/MNRAS/454/1332 : SFR in galaxies at redshift z∼0.8 (Shetty+, 2015)
J/ApJ/858/60 : z∼0.8 quiescent galaxy kinem from LEGA-C (Bezanson+, 2018)
J/MNRAS/476/1765 : MaNGA E and S galaxies properties (Li+, 2018)
J/ApJS/239/27 : LEGA-C DR2; galaxies in the COSMOS field (Straatman+, 2018)
J/ApJ/877/103 : Half-mass radii ∼7000 galaxies at 1.0≤z≤2.5 (Suess+, 2019)
J/ApJ/923/11 : Stellar kinematics of LEGA-C galaxies (van Houdt+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- LEGA [5/4061] LEGA-C DR3 identifier
6- 11 I6 --- UV [4792/260858] Ultra-VISTA identifier
13- 17 F5.2 Lsun Lg [7.46/11.91] g band luminosity
19- 23 F5.2 [Msun/Lsun] logL/M1 [-1.18/2.76] log g band Mass-to-light
ratio (1)
25- 28 F4.2 [Msun/Lsun] e_logL/M1 [0.02/8.31] The 16% percentile uncertainty
in logL/M1
30- 33 F4.2 [Msun/Lsun] E_logL/M1 [0.02/4.25] The 84% percentile uncertainty
in logL/M1
35- 39 F5.2 [Msun/Lsun] logL/M2 [-0.72/10.78] log g band Mass-to-light
ratio (2)
41- 44 F4.2 [Msun/Lsun] e_logL/M2 [0.01/0.14] The 16% percentile uncertainty
in logL/M2
46- 49 F4.2 [Msun/Lsun] E_logL/M2 [0.01/0.16] The 84% percentile uncertainty
in logL/M2
51- 54 F4.2 --- fDM [0.0/0.94] Dark matter fraction
56- 59 F4.2 --- e_fDM [0.0/0.7] The 16% percentile uncertainty
in fDM
61- 64 F4.2 --- E_fDM [0.04/1.0] The 84% percentile uncertainty
in fDM
66- 70 F5.2 --- Betaz [-0.27/0.45] Vertical anisotropy (3)
72- 75 F4.2 --- e_Betaz [0.08/0.46] The 16% percentile uncertainty
in Betaz
77- 80 F4.2 --- E_Betaz [0.04/0.4] The 84% percentile uncertainty
in Betaz
82- 83 I2 deg i [13/83] Inclination
85- 85 I1 deg e_i [3/6] The 50% percentile uncertainty in i
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Note (1): from the dark matter model.
Note (2): from the no dark matter model.
Note (3): Where Betaz = 1-<v2z>/<v2R>
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 17-Jun-2024