The impact of spiral density waves on the star formation distribution: a view from core-collapse supernovae

2018/11/29 by A. G. Karapetyan, A. A. Hakobyan, Karapetyan, A. G. +11
Physics and Astronomy · #Astrophysics and Star Formation Studies #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Gamma-ray bursts and supernovae #astro-ph.GA

paper · pdf · doi:10.48550/arxiv.1811.12001

6 pages, 4 figures; in press: proceedings of the conference "Instability Phenomena and Evolution of the Universe", Communications of Byurakan Astrophys. Obs., Vol. 65, Is. 2, Dec. 2018

arxiv created 2018/11/29 · openalex publication_date 2018/11/29 · arxiv updated 2018/11/30 · openalex created_date 2018/12/11 · openalex updated_date 2026/07/28

Abstract

We present an analysis of the impact of spiral density waves (DWs) on the radial and surface density distributions of core-collapse (CC) supernovae (SNe) in host galaxies with different arm classes. For the first time, we show that the corotation radius normalized surface density distribution of CC SNe (tracers of massive star formation) indicates a dip at corotation in long-armed grand-design (LGD) galaxies. The high SNe surface density just inside and outside corotation may be the sign of triggered massive star formation by the DWs. Our results may support the large-scale shock scenario induced by spiral DWs in LGD galaxies, which predicts a higher star formation efficiency around the shock fronts, avoiding the corotation region.

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