7 votes
Accepted

What are Thorne-Żytkow objects?

I'll try to add a bit of context to the Wikipedia article, though the major references are all available there. The article covers things like the potential formation mechanisms but I guess doesn't ...
  • 2,692
5 votes
Accepted

Are there any known neutron star - supergiant binaries?

One possible formation pathway for TŻOs involves a massive star undergoing mass transfer to a neutron star companion. A common envelope forms, and subsequent friction leads to a merger. High-mass x-...
  • 34.2k
5 votes
Accepted

If a white dwarf collides with a giant star, could it create a TZO?

Thorne and Żytkow's original paper on TŻOs actually opens with a comparison of TŻOs and the type of object you mention, with a white dwarf degenerate core instead of a neutron star degenerate core. ...
  • 34.2k
3 votes

If a white dwarf collides with a giant star, could it create a TZO?

If you slam a white dwarf into a main-sequence star or red giant such that the white dwarf becomes the core you'd get... a red giant (or supergiant). Perhaps that sounds odd but basically the cores ...
  • 2,692
1 vote
Accepted

"Holy grail" future observation to confirm presence of neutron stars in the centers of massive, otherwise conventional stars? (Thorne–Żytkow objects)

Primarily it is thought we will confirm/deny them based on detecting unusually large amounts of certain nuclei in the spectra. Things like lithium and calcium which are hard to get in "normal&...
  • 1,579
1 vote

If a white dwarf collides with a giant star, could it create a TZO?

The outer layers of the star will fall onto the white dwarf, forming an accretion disk as the star stuff spirals in. Like this image shows. When the white dwarf steals enough material to get bigger ...
  • 762

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