2007ApJ...664..204S

Query : 2007ApJ...664..204S

2007ApJ...664..204S - Astrophys. J., 664, 204-214 (2007/July-3)

Modeling noncircular motions in disk galaxies: application to NGC 2976.

SPEKKENS K. and SELLWOOD J.A.

Abstract (from CDS):

We present a new procedure to fit nonaxisymmetric flow patterns to two-dimensional velocity maps of spiral galaxies. We concentrate on flows caused by barlike or oval distortions to the total potential, which may arise either from a non-axially symmetric halo or a bar in the luminous disk. We apply our method to high-quality CO and Hα data for the nearby, low-mass spiral NGC 2976, previously obtained by Simon et al., and find that a barlike model fits the data at least as well as their model with large radial flows. We find supporting evidence for the existence of a bar in the baryonic disk. Our model suggests that the azimuthally averaged central attraction in the inner part of this galaxy is larger than estimated by these authors. It is likely that the disk is also more massive, which will limit the increase to the allowed dark halo density. Allowance for barlike distortions in other galaxies may either increase or decrease the estimated central attraction.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Dark Matter - galaxies: individual (NGC 2976) - Galaxies: Kinematics and Dynamics - Galaxies: Spiral - Galaxies: Structure

Simbad objects: 1

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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 NGC 2976 GiG 09 47 15.458 +67 54 58.97 11.77 11.03 10.16 9.51   ~ 712 1

Query : 2007ApJ...664..204S

Basic data :
NGC 2976 -- Galaxy towards a Group of Galaxies
Other object types: otypes_help 		GiP (), G (2014AJ,HIJASS,...), Rad (BWE,GB6,...), GiG (2007ApJ,[CHM2007]), IR (IRAS,PSCz), AG? (2020MNRAS), Opt (SDSS)
ICRS coord. (ep=J2000) : 		09 47 15.458 +67 54 58.97 (Infrared) [ ] C 2006AJ....131.1163S
FK4 coord. (ep=B1950 eq=1950) : 		09 43 09.838 +68 08 52.58 [ ]
Gal coord. (ep=J2000) : 		143.914428 +40.902510 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 3 [~] / z(spectroscopic) 0.000010 [~] / cz 3.00 [~]
   (Rad) D 2020ApJ...902..145K
Morphological type: 		SA C 2019MNRAS.488..590B
Angular size (arcmin): 		4.05263 2.92316 66 (Opt) B 2023ApJS..269....3M
Fluxes (12) :
U (AB) 11.77 [0.03] C 2014MNRAS.445..881C
B (AB) 11.03 [0.03] C 2014MNRAS.445..881C
V 10.16 [0.13] D 2007ApJS..173..185G
R (AB) 9.51 [0.03] C 2014MNRAS.445..881C
J 8.345 [0.020] C 2006AJ....131.1163S
H 7.722 [0.023] C 2006AJ....131.1163S
K 7.524 [0.030] C 2006AJ....131.1163S
u (AB) 13.560 [0.005] C 2009ApJS..182..543A
g (AB) 11.6223 [0.0013] B 2023ApJS..269....3M
r (AB) 10.8914 [0.0012] B 2023ApJS..269....3M
i (AB) 11.385 [0.002] C 2009ApJS..182..543A
z (AB) 10.9961 [0.0018] B 2023ApJS..269....3M
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 7
: 11 		: 54 Display criteria :

Identifiers (26) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NGC 2976 KUG 0943+681 SPB 108 [CHM2007] LDC 842 J094715.45+6754589
BWE 0943+6808 LEDA 28120 TC 516 [CHM2007] HDC 552 J094715.45+6754589
GB6 B0943+6809 2MASX J09471545+6754589 UGC 5221 [M98c] 094310.0+680843
87GB 094307.5+680848 2MASXI J0947167+675449 UZC J094715.3+675500 [MI94] Sm 42
HIJASS J0947+67 MCG+11-12-025 Z 312-23 [VDD93] 95
IRAS 09431+6809 PSCz Q09431+6809 Z 0943.1+6809
IRAS F09431+6809 SDSS J094715.30+675500.1 [B93] 9

References (712 between 1850 and 2026) (Total 712)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 12    Distance : 13   

   

Observing logs
Herschel : 12   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : NGC 2976

Link by name to the catalogue in VizieR :

NGC 2976 BWE 0943+6808 IRAS 09431+6809 IRAS F09431+6809 KUG 0943+681
2MASX J09471545+6754589 SDSS J094715.30+675500.1 UGC 5221

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