Hα Imaging of Early-type(Sa-Sab) Spiral Galaxies

Details Hα Imaging of Early-type(Sa-Sab) Spiral Galaxies Hα Imaging of Early-type(Sa-Sab) Spiral Galaxies

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.7615h&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #76.15; Bulletin of the American Astronomical Society, Vol. 29, p.1331

Astronomy and Astrophysics

Astronomy

Scientific paper

Hα imaging of Early-type (Sa-Sab) Spirals A recent analysis of the IRAS database indicates that the massive star formation rates in early-type(Sa-Sab) spirals are comparable to the massive star formation rates in late-type spirals. We are conducting an Hα imaging survey of a complete sample of nearby (D <= 40Mpc), bright (m(B) <= 12.1), early-type spirals to confirm the results obtained by IRAS. Our preliminary results indicate that a majority of these galaxies show either signs of interaction, and/or host nuclear starbursts. The occurence of nuclear starbursts in early-type spirals may be related to the propensity for such galaxies to also host Seyfert nuclei. The evidence for interactions suggests that early-type spirals are evolving in the current epoch.

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