The external origin of the gas in S0 galaxies

Autor(en)
Francesco Bertola, Lucio M Buson, Werner Zeilinger
Abstrakt

In this Letter we present three new cases of S0 galaxies, namely NGC 2768, NGC 4379, and IC 4889, out of a sample of 15, in which the gas is counterrotating or strongly kinematically decoupled with respect to the stellar body of the galaxy. Assuming gas infall with randomly oriented angular momentum, this result implies that in 40% of the galaxies in our sample, the ionized gas is of external origin. However, several pieces of evidence suggest that the acquisition of external gas in S0 galaxies can be even more general.

Organisation(en)
Institut für Astrophysik
Externe Organisation(en)
Università degli Studi di Padova, INAF - Osservatorio Astronomico di Padova
Journal
The Astrophysical Journal: an international review of astronomy and astronomical physics
Band
401
ISSN
0004-637X
Publikationsdatum
1993
Peer-reviewed
Ja
ÖFOS 2012
103003 Astronomie
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/the-external-origin-of-the-gas-in-s0-galaxies(7980fc81-0e8c-46ee-840a-e6c6f81a5312).html