J/ApJ/897/122 Rotational velocities for PHANGS sample of galaxies (Lang+, 2020)
PHANGS CO Kinematics: Disk Orientations and Rotation Curves at 150 pc
Resolution.
Lang P., Meidt S.E., Rosolowsky E., Nofech J., Schinnerer E., Leroy A.K.,
Emsellem E., Pessa I., Glover S.C.O., Groves B., Hughes A.,
Kruijssen J.M.D., Querejeta M., Schruba A., Bigiel F., Blanc G.A.,
Chevance M., Colombo D., Faesi C., Henshaw J.D., Herrera C.N., Liu D.,
Pety J., Puschnig J., Saito T., Sun J., Usero A.
<Astrophys. J., 897, 122 (2020)>
=2020ApJ...897..122L 2020ApJ...897..122L
ADC_Keywords: Galaxies; Interstellar medium; Rotational velocities
Keywords: Galaxy dynamics ; Interstellar medium ; Molecular clouds
Abstract:
We present kinematic orientations and high-resolution (150pc) rotation
curves for 67 main-sequence star-forming galaxies surveyed in CO (2-1)
emission by PHANGS-ALMA. Our measurements are based on the application
of a new fitting method tailored to CO velocity fields. Our approach
identifies an optimal global orientation as a way to reduce the impact
of nonaxisymmetric (bar and spiral) features and the uneven spatial
sampling characteristic of CO emission in the inner regions of nearby
galaxies. The method performs especially well when applied to the
large number of independent lines of sight contained in the PHANGS CO
velocity fields mapped at 1" resolution. The high-resolution rotation
curves fitted to these data are sensitive probes of mass distribution
in the inner regions of these galaxies. We use the inner slope as well
as the amplitude of our fitted rotation curves to demonstrate that CO
is a reliable global dynamical mass tracer. From the consistency
between photometric orientations from the literature and kinematic
orientations determined with our method, we infer that the shapes of
stellar disks in the mass range of log(M*(M☉))=9.0-10.9 probed by
our sample are very close to circular and have uniform thickness.
Description:
This work exploits observations of the Physics at High Angular
Resolution in Nearby GalaxieS Atacama Large Millimeter/submillimeter
Array (PHANGS-ALMA) sample of nearby galaxies with CO (2-1)
emission mapped with ALMA at high (∼1") angular resolution. Details of
the sample selection, ALMA observations, and data processing are
described in detail in A. K. Leroy+, (2020, in preparation).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 66 67 Basic properties of the kinematic PHANGS sample
tabled1.dat 42 2383 Tabulated rotation curves for the full sample of
67 galaxies
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See also:
VII/237 : HYPERLEDA. I. Catalog of galaxies (Paturel+, 2003)
J/AJ/114/2402 : Rotation curves of early-type galaxies (Courteau+, 1997)
J/MNRAS/388/500 : GHASP: Hα data cubes for 108 galaxies (Epinat+, 2008)
J/PASP/122/1397 : Spitzer Survey of Stellar Structure in Galaxies (Sheth+,2010)
J/ApJ/771/59 : Surface brightness S4G face-on galaxie (Munoz-Mateos+,2013)
J/A+A/582/A86 : Catalogue of features in the S4G (Herrera-Endoqui+, 2015)
J/ApJS/219/4 : S4G pipeline 4: multi-component decompositions (Salo+, 2015)
J/AJ/152/157 : Mass models for 175 disk galaxies with SPARC (Lelli+, 2016)
J/ApJ/846/71 : M51 ISM structures from the CO maps of PAWS (Leroy+, 2017)
J/ApJ/860/172 : Cloud-scale molecular gas properties 15 galaxies (Sun+, 2018)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- ID Galaxy identifier
10- 18 F9.5 deg RAdeg [24.17/347.5] Degree of right ascension (J2000)
20- 28 F9.5 deg DEdeg [-73.93/21.69] Degree of declination (J2000)
30- 33 F4.1 Mpc Dist [4.4/26.1] Distance
35- 40 F6.1 km/s Vsys [-220/2408] Systemic velocity
42- 46 F5.1 deg PA [-5/342.3] Position angle
48- 51 F4.1 deg i [4.9/80.5] Disk inclination
53- 56 F4.2 arcsec fCO [0.05/0.56] CO covering fraction
58- 61 F4.2 --- Rbar/Rco [0/1.32] Ratio between bar length and the
extent of the ALMA CO velocity fields
63- 66 F4.2 --- Rco/R25 [0.26/1.21] ratio between the extent of the
ALMA CO velocity fields and the disk size
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Byte-by-byte Description of file: tabled1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- ID Galaxy identifier
10- 16 F7.4 kpc Rad [0.125/11.675] Radius
18- 25 F8.4 km/s VRot [-2.1652/323.116] Rotational velocity
27- 34 F8.4 km/s E_VRot [0.1974/115.9144] Upper uncertainty in VRot (1)
36- 42 F7.4 km/s e_VRot [0.137/77.1384] Lower uncertainty in VRot (1)
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Note (1): Velocity errors are based on the 16th and 84th percentiles of the 100
rotation curve realizations (see Section 3.3.2 for details).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 28-Sep-2021