Surviving companions of Type Ia supernovae: theory and observations. (arXiv:1812.04977v1 [astro-ph.SR])
<a href="http://arxiv.org/find/astro-ph/1/au:+Ruiz_Lapuente_P/0/1/0/all/0/1">Pilar Ruiz-Lapuente</a>

We review the theoretical background and the observational searches made for
surviving companions of Type Ia supernovae. Theory comprises the
characteristics of the stellar binary companions of the exploding white dwarfs
at the time of the supernova outburst and the expected effects on them of the
explosion, as well as their subsequent evolution. That includes space
velocities, rotation, luminosities (with discussion of possible mechanisms
producing very faint companions) .

We then present the searches already made in the Galactic remnants of Type Ia
supernovae and we assess the results obtained up to now using ground-based
telescopes and the {it Hubble Space Telescope}. The same is done for the
remnants of this type in the Large Magellanic Cloud. In both cases, we also
characterize already identified remnants which are currently being investigated
or that will be explored in the near future. We finally discuss the prospects
to elucidate from those searches, using the {it Hubble Space Telescope},
astrometric results from the {it Gaia} space mission and the next generation
of very large ground–based telescopes, which stellar systems do actually
produce Type Ia supernovae.

We review the theoretical background and the observational searches made for
surviving companions of Type Ia supernovae. Theory comprises the
characteristics of the stellar binary companions of the exploding white dwarfs
at the time of the supernova outburst and the expected effects on them of the
explosion, as well as their subsequent evolution. That includes space
velocities, rotation, luminosities (with discussion of possible mechanisms
producing very faint companions) .

We then present the searches already made in the Galactic remnants of Type Ia
supernovae and we assess the results obtained up to now using ground-based
telescopes and the {it Hubble Space Telescope}. The same is done for the
remnants of this type in the Large Magellanic Cloud. In both cases, we also
characterize already identified remnants which are currently being investigated
or that will be explored in the near future. We finally discuss the prospects
to elucidate from those searches, using the {it Hubble Space Telescope},
astrometric results from the {it Gaia} space mission and the next generation
of very large ground–based telescopes, which stellar systems do actually
produce Type Ia supernovae.

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