2022MNRAS.513.3541B

Query : 2022MNRAS.513.3541B

2022MNRAS.513.3541B - Mon. Not. R. Astron. Soc., 513, 3541-3548 (2022/July-1)

Overestimated inclinations of Milgromian disc galaxies: the case of the ultradiffuse galaxy AGC 114905.

BANIK I., NAGESH S.T., HAGHI H., KROUPA P. and ZHAO H.

Abstract (from CDS):

We present two hydrodynamical star-forming simulations in the Milgromian dynamics (MOND) framework of a gas-rich disc galaxy with properties similar to AGC 114905, which has recently been argued to have a rotation curve (RC) that is inconsistent with the MOND prediction. Our first model considers the galaxy in isolation, while our second model includes an external field of 0.05 \, a_{_0}, the estimated gravitational field from large-scale structure. We show that isophotes in the face-on view can differ from circular at the 50 per cent level. This could mislead observers into overestimating the inclination i between disc and sky planes. Because RCs require a correction factor of 1/sin i, the actual RC could be much higher than that reported by observers. This plausibly reconciles AGC 114905 with MOND expectations.

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

Journal keyword(s): gravitation - galaxies: dwarf - galaxies: fundamental parameters - galaxies: individual: AGC 114905 - galaxies: kinematics and dynamics

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 AGC 114905 LSB 01 25 18.5 +07 21 37           ~ 30 0

Query : 2022MNRAS.513.3541B

Basic data :
AGC 114905 -- Low Surface Brightness Galaxy
Other object types: otypes_help 		G (2018ApJ,AGC), LSB (2017ApJ)
ICRS coord. (ep=J2000) : 		01 25 18.5 +07 21 37 (Optical) [ ] D 2017ApJ...842..133L
FK4 coord. (ep=B1950 eq=1950) : 		01 22 41.7 +07 06 01 [ ]
Gal coord. (ep=J2000) : 		137.5153 -54.5496 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 5435 [3] / z(emission) 0.018297 [0.000010] / cz 5485.17 [3.00]
   (Rad) C 2022ApJS..261...21Y
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Identifiers (1) :
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AGC 114905

References (30 between 1850 and 2026) (Total 30)
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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Velocities : 3    Distance : 2   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : AGC 114905

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