2022MNRAS.512.1765O

Query : 2022MNRAS.512.1765O

2022MNRAS.512.1765O - Mon. Not. R. Astron. Soc., 512, 1765-1780 (2022/May-2)

The SAMI Galaxy Survey: the difference between ionized gas and stellar velocity dispersions.

OH S., COLLESS M., D'EUGENIO F., CROOM S.M., CORTESE L., GROVES B., KEWLEY L.J., VAN DE SANDE J., ZOVARO H., VARIDEL M.R., BARSANTI S., BLAND-HAWTHORN J., BROUGH S., BRYANT J.J., CASURA S., LAWRENCE J.S., LORENTE N.P.F., MEDLING A.M., OWERS M.S. and YI S.K.

Abstract (from CDS):

We investigate the mean locally measured velocity dispersions of ionized gas (σgas) and stars (σ*) for 1090 galaxies with stellar masses log(M*/M☉) ≥9.5 from the SAMI Galaxy Survey. For star-forming galaxies, σ* tends to be larger than σgas, suggesting that stars are in general dynamically hotter than the ionized gas (asymmetric drift). The difference between σgas and σ* (Δσ) correlates with various galaxy properties. We establish that the strongest correlation of Δσ is with beam smearing, which inflates σgas more than σ*, introducing a dependence of Δσ on both the effective radius relative to the point spread function and velocity gradients. The second strongest correlation is with the contribution of active galactic nuclei (AGN) (or evolved stars) to the ionized gas emission, implying that the gas velocity dispersion is strongly affected by the power source. In contrast, using the velocity dispersion measured from integrated spectra (σap) results in less correlation between the aperture-based Δσ (Δσap) and the power source. This suggests that the AGN (or old stars) dynamically heat the gas without causing significant deviations from dynamical equilibrium. Although the variation of Δσap is much smaller than that of Δσ, a correlation between Δσap and gas velocity gradient is still detected, implying that there is a small bias in dynamical masses derived from stellar and ionized gas velocity dispersions.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): galaxies: active - galaxies: evolution - galaxies: fundamental parameters - galaxies: kinematics and dynamics - galaxies: stellar content - galaxies: structure

Simbad objects: 1

goto Full paper

goto View the references in ADS

Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 LEDA 1111969 G 14 31 01.89482 -01 43 01.9849   17.112   16.179   ~ 22 0

Query : 2022MNRAS.512.1765O

Basic data :
LEDA 1111969 -- Galaxy
Other object types: otypes_help 		G (2010MNRAS,LEDA,...), Opt (SDSS)
ICRS coord. (ep=J2000) : 		14 31 01.89482 -01 43 01.9849 (Optical) [ ] C 2020ApJS..249....3A
FK4 coord. (ep=B1950 eq=1950) : 		14 28 26.98661 -01 29 46.1636 [ ]
Gal coord. (ep=J2000) : 		346.64998840 +52.48950912 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 16041 [3] / z(spectroscopic) 0.05502 [0.00001] / cz 16494.6 [3.0]
   (Opt) C 2020ApJS..249....3A
Morphological type: 		S D 2010MNRAS.405..783M
Angular size (arcmin): 		0.319663 0.278299 98 (Opt) B 2023ApJS..269....3M
Fluxes (7) :
B 17.112 [~] D 2001MNRAS.328.1039C
R 16.179 [~] D 2001MNRAS.328.1039C
u (AB) 18.287 [0.039] C 2020ApJS..249....3A
g (AB) 16.952 [0.006] B 2020ApJS..249....3A
r (AB) 16.316 [0.005] B 2020ApJS..249....3A
i (AB) 15.964 [0.005] B 2020ApJS..249....3A
z (AB) 15.8530 [0.0066] B 2023ApJS..269....3M
SIMBAD within arcmin
Overlay Simbad points in this preview
Back
All CDSPortal (CDSPortal)
Send to sendBySAMP sendBySAMP
sedIcon
within arcsec sed-help-icon

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 3 : 38 Display criteria :

Identifiers (6) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

LEDA 1111969 GAMA 485885 SDSS J143101.89-014301.9
2dFGRS TGN209Z117 GAMA J143101.89-014301.9 [CCL2013] 2PIGG n1622 9

References (22 between 1850 and 2026) (Total 22)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
Follow new references on this object
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)

Collections of Measurements Description of Measurements

Velocities : 7   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : LEDA 1111969

Link by name to the catalogue in VizieR :

2dFGRS TGN209Z117 SDSS J143101.89-014301.9

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

The annotation server is currently not available. Sorry for any inconvenience

To bookmark this query, right click on this link: simbad:objects in 2022MNRAS.512.1765O and select 'bookmark this link' or equivalent in the popup menu