Talk:Calvera (X-ray source)

Calvera is remarkable among young neutron stars in its high galactic latitude; stars capable of forming type II supernovae typically die off within 50 million years, which restricts the time they have to travel away from their birth cluster.

However, the progenitor of Calvera may be able to survive long enough if it had merged with a second star, likely a companion in a close binary. Assuming the two components have an equal 5 solar masses, the pair may be able to survive for ~100 Myr, which provides ample time for the star to be perturbed into the thick disk.

As the two stars expanded into red giants, their enlarged photospheres engulfed the other, and the cores merged due to drag. The merged star, now with over 6-8 solar masses, would not have time to expel its mass in time and would collapse on in itself to form a neutron star.

^ Please do not insert this into the article as this is both WP:OR and citation needed. Perhaps a researcher may take inspiration from this. Pancakes321 (talk) 15:27, 8 September 2025 (UTC)

It has been proposed in this section that Calvera (X-ray source) be renamed and moved to Calvera (neutron star)Calvera (neutron star). A bot will list this discussion on the requested moves current discussions subpage within an hour of this tag being placed. The discussion may be closed 7 days after being opened, if consensus has been reached (see the closing instructions). Please base arguments on article title policy, and keep discussion succinct and civil. Please use {{subst:requested move}}. Do not use {{requested move/dated}} directly. Links: current log • target log • direct move

Calvera (X-ray source) → Calvera (neutron star)Calvera (neutron star) – This seems like a better disambiguator, saying what it is (a neutron star), not just that it emits X-rays. However the page was originally created with this title, and moved to the current title in 2009 with the comment See original paper dubbed "Calvera". I guess that's this paper, which uses some uncertain wording – it would seem its status as a neutron star was unconfirmed (if likely) at the time, but it seems clearly confirmed now; recent sources consistently refer to it as a neutron star or pulsar. SevenSpheres (talk) 15:51, 18 April 2026 (UTC)

Support I think it's very clear that the new proposed has more clearly tells about the object. Abdullah1099 (talk) 13:19, 19 April 2026 (UTC)