Relics of subluminous supernovae in metal-poor stars

Abstract

The unique elemental abundance pattern of the carbon-rich stars CS29498-043 and CS22949-037 is characterized by a large excess of magnesium and silicon in comparison with iron. This excess is investigated in the context of a supernova-induced star formation scenario, and it is concluded that these stars were born from the matter swept up by supernova remnants containing little iron and that such supernovae are similar to the least-luminous SNe ever observed, SNe 1997D and 1999br. Comparison of the observed abundance pattern in iron-group elements of subluminous supernovae with those of other supernovae leads to an intriguing implication for explosion, nucleosynthesis, and mixing in supernovae. The observed invariance of these ratios can not be accounted for by a spherically symmetric supernova model.

5 pages including 3 figures, to appear in ApJ Letters February 20 issue

References in corpus (1)

• Peculiar, Low Luminosity Type II Supernovae: Low Energy Explosions in Massive Progenitors?

Cited by in corpus (17)

• First stars V - Abundance patterns from C to Zn and supernova yields in the early Galaxy
• Galactic chemical evolution: Carbon through Zinc
• Carbon Enhanced Metal-Poor Stars. I. Chemical Compositions of 26 Stars
• Detailed Abundances for 28 Metal-poor Stars: Stellar Relics in the Milky Way
• Variations in the Abundance Pattern of Extremely Metal-poor Stars and Nucleosynthesis in Population III Supernovae
• HE0107-5240, A Chemically Ancient Star.I. A Detailed Abundance Analysis
• HE1327-2326, an unevolved star with [Fe/H]<-5.0. I. A Comprehensive Abundance Analysis
• Spectroscopic Studies of Very Metal-Poor Stars with the Subaru High Dispersion Spectrograph. III. Light Neutron-Capture Elements
• SN 2009md: Another faint supernova from a low mass progenitor
• Analysis of the carbon-rich very metal-poor dwarf G77-61
• Principal Component Analysis on Chemical Abundances Spaces
• The Origins of Two Classes of Carbon-Enhanced, Metal-Poor Stars
• Oxygen Overabundance in the Extremely Iron-Poor Star CS29498-043
• Spectroscopic Studies of Extremely Metal-Poor Stars with the Subaru High Dispersion Spectrograph. IV. The alpha-Element-Enhanced Metal-Poor Star BS16934-002
• Excavation of the first stars
• The Hamburg/ESO R-process Enhanced Star survey (HERES) VI. The Galactic Chemical Evolution of Silicon
• A Search for Strongly Mg-enhanced Stars from the Sloan Digital Sky Survey