SIMBAD references

2008ApJ...672L.103K - Astrophys. J., 672, L103-L106 (2008/January-2)

Strangulation in galaxy groups.

KAWATA D. and MULCHAEY J.S.

Abstract (from CDS):

We use a cosmological chemodynamical simulation to study how the group environment impacts the star formation (SF) properties of disk galaxies. The simulated group has a total mass of M ∼ 8x10^ 12^ M and a total X-ray luminosity of LX∼ 1041 erg/s. Our simulation suggests that ram pressure is not sufficient in this group to remove the cold disk gas from a Vrot∼ 150 km/s galaxy. However, the majority of the hot gas in the galaxy is stripped over a timescale of approximately 1 Gyr. Since the cooling of the hot-gas component provides a source for new cold gas, the stripping of the hot component effectively cuts off the supply of cold gas. This in turn leads to a quenching of SF. The galaxy maintains the disk component after the cold gas is consumed, which may lead to a galaxy similar to an S0. Our self-consistent simulation suggests that this strangulation mechanism works even in low-mass groups, providing an explanation for the lower SF rates in group galaxies relative to galaxies in the field.

Abstract Copyright:

Journal keyword(s): Galaxies: Evolution - Galaxies: Kinematics and Dynamics - Galaxies: Stellar Content - Methods: Numerical

Simbad objects: 2

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