2012MNRAS.421.2155J

Query : 2012MNRAS.421.2155J

2012MNRAS.421.2155J - Mon. Not. R. Astron. Soc., 421, 2155-2160 (2012/April-2)

The role of large-scale magnetic fields in galaxy NGC 891: can magnetic fields help to reduce the local mass-to-light ratio in the galactic outskirts?

JALOCHA J., BRATEK L., PEKALA J. and KUTSCHERA M.

Abstract (from CDS):

We address the problem of the influence of large-scale magnetic fields on galactic rotation for the example of the spiral galaxy NGC 891. Based on its rotation curve and the surface density of H I we determine, in the framework of the global disc model, the surface density of matter. Then, based on the surface brightness, we determine the corresponding profile of the local mass-to-light ratio. We also model the vertical gradient of azimuthal velocity in the quasi-circular-orbit approximation, and compare it with measurements. We discuss what factors may influence the rotation of matter in NGC 891 and how this can translate to changes in the profile of the local mass-to-light ratio. In particular, we discuss the possible effect of magnetic fields on the motion of ionized gas, and, consequently, on the determination of the profile of the local mass-to-light ratio. Finally, we put forward the hypothesis that the asymmetry in magnetic fields observed in NGC 891 might be responsible for the observed anomalous behaviour of the vertical gradient.

Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS

Journal keyword(s): galaxies: individual: NGC 891 - galaxies: kinematics and dynamics - galaxies: magnetic fields - galaxies: spiral - galaxies: structure

Errata: erratum vol. 443, p. 2436 (2014)

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 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1741 2

Query : 2012MNRAS.421.2155J

Basic data :
NGC 891 -- HII Galaxy
Other object types: otypes_help 		G (2009MNRAS,LEDA,...), Rad (B3,B3VLA,...), IR (IRAS,ISOSS,...), GiG (2007ApJ,[CHM2007]), smm (JCMTSE,JCMTSF), H2G (2011A&A), AG? (2020MNRAS), NIR (2MASS)
ICRS coord. (ep=J2000) : 		02 22 32.907 +42 20 53.95 (Infrared) [ ] C 2006AJ....131.1163S
FK4 coord. (ep=B1950 eq=1950) : 		02 19 24.157 +42 07 15.58 [ ]
Gal coord. (ep=J2000) : 		140.382248 -17.415247 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 528 [~] / z(spectroscopic) 0.001763 [~] / cz 528.47 [~]
   (Opt) D 2009MNRAS.398..722T
Morphological type: 		SA(s)b? D 2013AJ....145..137K
Angular size (arcmin): 		12.30 2.45 22 (Opt) D 2003A&A...412...45P
Fluxes (7) :
U 11.08 [0.18] D 2007ApJS..173..185G
B 10.81 [0.18] D 2007ApJS..173..185G
V 9.93 [0.18] D 2007ApJS..173..185G
R 7.86 [~] D 2009MNRAS.398..722T
J 7.256 [0.017] C 2006AJ....131.1163S
H 6.362 [0.017] C 2006AJ....131.1163S
K 5.938 [0.017] C 2006AJ....131.1163S
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 3
: 42 		: 76 Display criteria :

Identifiers (40) :
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NGC 891 ISOSS J02225+4221 PLCKERC -100 G140.41-17.39 Z 538-52
B3 0219+421 JCMTSE J022233.0+422050 PSCz Q02193+4207 Z 0219.4+4207
B3VLA 0219+421 JCMTSF J022233.0+422050 TC 454 [BTW2003] J0222+4219
BWE 0219+4207 LEDA 9031 TIC 293122165 [CAB95] IRAS F02194+4207
6C 021924+420732 2MASS J02223247+4220494 UGC 1831 [CHM2007] LDC 160 J022232.90+4220539
7C 021924.60+420736.00 2MASX J02223290+4220539 UZC J022233.4+422102 [M98c] 021924.3+420710
GB6 B0219+4207 MCG+07-05-046 VLSS J0222.5+4221 [NKB95] N0891
87GB 021924.1+420706 MITG J022231+4220 WB 0219+4207 [SLK2004] 299
IRAS F02194+4207 MY 021923.8+420734.9 WN B0219.4+4207 [TT2009] 2
IRAS 02193+4207 MY 021923.8+422113.3 ZOAG G140.38-17.42 [VDD93] 15

References (1741 between 1850 and 2026) (Total 1741)
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 : 14    Distance : 14   

   

Observing logs
Herschel : 30    ISO : 34    XMM : 1   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : NGC 891

Link by name to the catalogue in VizieR :

NGC 891 BWE 0219+4207 IRAS F02194+4207 IRAS 02193+4207 2MASS J02223247+4220494
2MASX J02223290+4220539 MITG J022231+4220 UGC 1831 WN B0219.4+4207

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