SIMBAD references

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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