Astrolunch: Chanda Jog

Tue, 26/10/202112:30-13:30

Title: Lopsided Spiral Galaxies
Abstract: The light distribution in many spiral galaxies is observed to be lopsided,
or extended along one side, as in M 101. This indicates an azimuthal mass
asymmetry (m=1). Lopsidedness is ubiquitous and occurs in stars and gas,
in the outer disk as well as the central region. Its typical measured amplitude
is high (~ 10 %), making it a common feature of spiral galaxies. Its origin and
dynamics are not yet fully understood; typical physical mechanisms proposed
for its origin are tidal encounters and gas accretion. The lopsidedness has
a strong impact on the dynamics and evolution of a galaxy. In this talk, I will
describe our contributions over the years to various aspects of this topic and
the related open problems.