Blue Large-Amplitude Pulsators: the Possible Surviving Companions of Type Ia Supernovae

Abstract

The single degenerate (SD) model, one of the leading models for the progenitors of Type Ia supernovae (SNe Ia), predicts that there should be binary companions that survive the supernova explosion which, in principle, should be detectable in the Galaxy. The discovery of such surviving companions could therefore provide conclusive support for the SD model. Several years ago, a new type of mysterious variables was discovered, the so-called blue large-amplitude pulsators (BLAPs). Here we show that all the properties of BLAPs can be reasonably well reproduced if they are indeed such surviving companions, in contrast to other proposed channels. This suggests that BLAPs could potentially be the long-sought surviving companions of SNe Ia. Our model also predicts a new channel for forming single hot subdwarf stars, consistent with a small group in the present hot-subdwarf-star sample.

21 pages, 13 figures, accepted for publication in ApJ

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Cited by in corpus (12)

• Year 1 of the ZTF high-cadence Galactic Plane Survey: Strategy, goals, and early results on new single-mode hot subdwarf B-star pulsators
• Binary evolution pathways of Blue Large-Amplitude Pulsators
• Shell helium-burning hot subdwarf B stars as candidates for blue large-amplitude pulsators
• Identifying Blue Large Amplitude Pulsators from Gaia DR2 & ZTF DR3
• HD 133729: A blue large-amplitude pulsator in orbit around a main-sequence B-type star
• Hydrodynamical simulations for the common-envelope wind model for Type Ia supernovae
• Physical Properties of 29 sdB+dM Eclipsing Binaries in Zwicky Transient Facility
• Observational Parameters of Blue Large-amplitude Pulsators
• OGLE-BLAP-001 and ZGP-BLAP-08: two possible magnetic blue large-amplitude pulsators
• Binary Evolution Pathways to Blue Large-Amplitude Pulsators: Insights from HD 133729
• The oscillation properties of the Blue Large Amplitude Pulsators (BLAPs): relative change rate of periods, excitations, and period relations
• Hot subdwarfs from the surviving companions of the white dwarf + main-sequence channel of Type Ia supernovae