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Astronomy Reports

, Volume 61, Issue 4, pp 337–341 | Cite as

Collective supernova outbursts and the growth of supershells: Observational manifestations

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Abstract

Numerous supernova outbursts that are correlated in time and space are the main mechanism for the formation of powerful galactic winds and supershells of ionized hydrogen. Information about the dynamics and thermal properties of the gas in shells (bubbles) can be obtained from spectral observations, including those of optical recombination lines. The emission properties of the Hα and Hβ recombination lines and the velocity dispersion of the gas in bubbles formed by numerous supernova outbursts are studied. The appearance of the intensity vs. velocity dispersion (I(H α)−σ) diagram depends on the supernova rate and the age of the bubble. The temperature dependence of the I(Hα)/I(H β) line-intensity ratio (the Balmer decrement) can be used to obtain additional constraints on the evolutionary status of a collective remnant formed by numerous supernova outbursts.

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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  1. 1.Astro Space Center, Lebedev Physical InstituteRussian Academy of SciencesMoscowRussia
  2. 2.Southern Federal UniversityRostov-on-DonRussia
  3. 3.Special Astrophysical ObservatoryRussian Academy of Sciences, Nizhnii ArkhyzKarachaevo-Cherkesskaya RepublicRussia

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