Galactic restrictions on iron production by various Types of supernovae

Abstract

We propose a statistical method for decomposition of contributions to iron production from various sources: supernovae Type II and the subpopulations of supernovae Type Ia -- prompt (their progenitors are short-lived stars of ages less then $\sim$100 Myr) and tardy (whose progenitors are long-lived stars of ages $>$100 Myr). To do that, we develop a theory of oxygen and iron synthesis which takes into account the influence of spiral arms on amount of the above elements synthesized by both the supernovae Type II and prompt supernovae Ia. We solve this task without of any preliminary suppositions about the ratio among the portions of iron synthesized by the above sources. The relative portion of iron synthesized by tardy supernovae Ia for the life-time of the Galaxy is $\sim$35 per cent (in the present ISM this portion is $\sim$50 per cent). Correspondingly, the total portion of iron supplied to the disc by supernovae Type II and prompt supernovae Ia is $\sim$65 per cent (in the present ISM this portion is $\sim$50 per cent). The above result slightly depends on the adopted mass of oxygen and iron synthesized during one explosion of supernovae and the shape (bimodal or smooth) of the so-called Delay Time Distribution function. The portions of iron mass distributed between the short-lived supernovae are usually as follows: depending on the ejected masses of oxygen or iron during one supernovae Type II event the relative portion of iron, supplied to the Galactic disc for its age, varies in the range 12 - 32 per cent (in the present ISM 9-25 per cent); the portion supplied by prompt supernovae Ia to the Galactic disc is 33 - 53 per cent (in ISM 26 - 42 per cent).

16 pages, 8 figures, 2 tables accepted to Mon. Not. R. Astron. Soc

References in corpus (10)

• Cold gas accretion in galaxies
• HERMES: a high-resolution fibre-fed spectrograph for the Mercator telescope
• Galaxy Evolution in Cosmological Simulations With Outflows I: Stellar Masses and Star Formation Rates
• The present-day star formation rate of the Milky-Way determined from Spitzer detected young stellar objects
• A new calibration of Galactic Cepheid Period-Luminosity relations from B to K bands, and a comparison to LMC PL relations
• The Distribution of the Elements in the Galactic Disk II. Azimuthal and Radial Variation in Abundances from Cepheids
• A new formulation of the Type Ia SN rate and its consequences on galactic chemical evolution
• Evidence for short-lived SN Ia progenitors
• Reddenings of FGK supergiants and classical Cepheids from spectroscopic data
• Is it possible to reveal the lost siblings of the Sun?

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