Comments on: Contact Binary https://briankoberlein.com/2015/10/28/contact-binary/ Brian Koberlein Tue, 19 Feb 2019 13:26:59 +0000 hourly 1 https://wordpress.org/?v=5.0.3 By: Jpatrick https://briankoberlein.com/2015/10/28/contact-binary/#comment-3175 Wed, 28 Oct 2015 18:02:53 +0000 https://briankoberlein.com/?p=5400#comment-3175 From the abstract:

“.. dynamical masses — M1=28.63±0.30M⊙ and M2=28.85±0.30M⊙” . Thus the two blue giants are estimated to be just under 30 solar masses each.

The system is about 160,000 light years away

]]> By: RichK https://briankoberlein.com/2015/10/28/contact-binary/#comment-3174 Wed, 28 Oct 2015 15:06:06 +0000 https://briankoberlein.com/?p=5400#comment-3174 but/when/one/explodes/won’t/it/strip/the/other/of/enough/matter/to/preclude/a/blackhole/from/forming?

]]> By: Richard https://briankoberlein.com/2015/10/28/contact-binary/#comment-3173 Wed, 28 Oct 2015 15:01:12 +0000 https://briankoberlein.com/?p=5400#comment-3173 The article does not indicate either the combined or the relative masses of the binary or its constitute stars, although the illustration would seem to indicate that they are least within an order of magnitude of each others mass/size or one would surely already be significantly consuming the other: which was also not indicated. Therefore, would it not be safe to assume that the disruptive potential of either star toward its co-binary to be roughly equivalent so that it matters not which star implodes first??

This raises in me three or four questions regarding the plausibility of this contact type O binary forming a close black hole binary:

Would star B survive the supernova of star A or so not be so degraded as to unable to proceed to a back hole producing sized supernova?;

If so, would the contact or near contact proximity remain–that is neither star is ejected from the system, as we have seen wherein close companion stars have been eject during supernova events (ex. US 708 noted in the Pan-STARRS1 survey results published on http://www.keckobservatory.org, Mar 2015)? And lastly;

Presuming the answer is yes to both of my first two questions, would not the the now black hole (ex-star A) start consuming star B so rapidly and and so violently as to disrupt the latter through direct consumption and/or tidal disruption, and/or by the intense outward radiation of such a large, rapid and close accretion & consumption process do likewise and prevent star B from proceeding on to a black hole producing supernova because of lost mass and/or severe tidal/physical/mass disruption?

In the unlikely event that they should both happen to implode at the same time, wouldn’t that be sufficient to eject both of them from the binary?

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