Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..393..555g&link_type=abstract
The seventh astrophysical conference: Star formation, near and far. AIP Conference Proceedings, Volume 393, pp. 555-557 (1997).
Astronomy and Astrophysics
Astrophysics
2
Radio Galaxies, Origin, Formation, Evolution, Age, And Star Formation, Magnitudes And Colors, Luminosities
Scientific paper
The three clouds of neutral hydrogen around NGC 5128 (Cen A) are most likely surviving remnants of an earlier merger. One of them, NE of the galaxy, appears to be impacted by the adjacent radio jet to the extent that star formation is currently being triggered and loose chains of blue supergiant stars are observed. Some of these stars excite small H II regions whose velocities correspond very closely to that of the H I which in the area. Distinct from these H II regions is the more diffuse, filamentary gas which extends much further along the radio axis and which appears to be excited by shocks associated with the radio jet itself. It is important to realize that the many blue stars are resolved only because NGC 5128 is so very close for a giant radio galaxy. The reported faint blue extensions and plumes in more distant analogs probably have a similar origin.
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