Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.170..305v&link_type=abstract
(IAU, European Regional Astronomy Meeting, 11th, La Laguna, Spain, July 3-8, 1989) Astrophysics and Space Science (ISSN 0004-640
Astronomy and Astrophysics
Astrophysics
2
Galactic Bulge, Galactic Structure, H I Regions, Radio Emission, Spiral Galaxies, Stellar Activity, Astronomical Photometry, Charge Coupled Devices, Galactic Nuclei, Gravitational Fields, Stellar Luminosity
Scientific paper
Evidence for circumnuclear starbursts in spiral galaxies can take the form of a blue excess near the nucleus, but more frequently (because of dust extinction) H I or radio continuum emission. Such bursts are quite common, even in objects with no interacting companions. One consequence of a burst is to sweep gas outward from the inner zone, so further bursts (and perhaps the initial one) need to be resupplied with gas. This can be effected via a nonaxisymmetric gravitational potential, not necessarily a bar, in the nuclear bulge. Searching for these nonaxisymmetric features, two-dimensional photometry has been obtained from CCD maps in B, V, R, I, and Z bands, for a set of galaxies which have undergone starburst activity.
Beckman John E.
Cepa Jordi
Munoz-Tunon Casiana
Varela Antonia Maria
Vilchez José M.
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