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| Paper: |
The Impact of Bars and Spiral Density Waves on the Relative Frequencies of Supernovae |
| Volume: |
511, Non-Stable Universe: Energetic Resources, Activity Phenomena and Evolutionary Processes |
| Page: |
200 |
| Authors: |
Aramyan, L. S.; Hakobyan, A. A.; Petrosian, A. R.; Barkhudaryan, L. V.; Karapetyan, A. G.; Adibekyan, V.; Turatto, M. |
| Abstract: |
We present the results of the analysis of the impact of bars and spiral density waves on the
relative frequencies of supernovae (SNe). We find that for early-type
Grand-Design (GD) and non-Grand-Design (NGD) galaxies,
the NIa/NCC ratios, i.e., one of the tracers of specific star
formation rate (sSFR), are not significantly different between barred
and unbarred hosts. At the same time, for both barred and unbarred early-type galaxies,
the NIa/NCC ratio in NGD hosts is significantly higher than that in GD,
and for late-type galaxies no any significant difference exists between the NIa/NCC ratios.
Thus, in contrast to bars, the spiral density waves significantly
enhance the relative frequencies of SNe in early-type GD galaxies,
while not in late-type hosts. This result is actual also for
galaxies when barred and unbarred categories are separated. Hence,
the sSFR might be enhanced by density waves in early-type galaxies only. |
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