Re: Triple Sunset: Planet Discovered in 3-Star System

Orbits can be stable in triple star systems after all the three stars are
bound, but for how long? According to my computer analysis a three
component system is only stable if two of the components are less that 1/100
the mass of tyhe primary. This is a numerical simulation based on eulers
integration to give the solution to a multi-body problem. If the mass of
the second or third component is too high then the third component is
eventually ejected from the systym. This occurs with three nearly equal
masses, one gets ejected.

I doubt if this quasi-stable planetary orbit will be there for ever. But
how stable is "stable". If the separation is big enought between the three
or two primaries then I would of thought stability would be very high, and
as nearly as stable as our solar system.

It is believed by some astronomers that the Sun is bound in a binary with
another star some way off that may be a black dwarf or neutron star.

Chris.

"Brad Guth" <ieisbradguth@xxxxxxxxx> wrote in message
news:1122408211.896478.101090@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>1 Jason H.,
> That's rather downright odd. Here I'd honestly contributed as to the
> matter of an astronomy fact that Sirius-b was likely if not
> astrophysics-101 somewhat required as once upon a time being a
> red-giant, and lo and behold, gosh darn if it seems as though all of
> the topic lights went out. Why the heck is that? or perhaps what's so
> gosh darn taboo/nondisclosure about the Sirius star system?
>
> http://www.solstation.com/stars/sirius2.htm
> Hunt for Sirius C and Substellar Companions
>
> According to Duchner and Brown (2000 preprint -- in postscript), three
> analyses of the proper motion of Sirius found a perturbation in the
> orbit of Sirius B with a period around six years (Ch. Volet, 1932;
> Walbaum and Duvent, 1983; and Benest and Duvent, 1995). The analyses
> did not resolve whether the perturbing body orbits Sirius A or B,
> although dynamical simulations suggest that stable orbits exist around
> both stars at circumstellar distances up to more than half the binary
> system's closest separation of 8.1 AUs (Daniel Benest, 1989). Because
> ancient astronomers believed that Sirius was red in color as late as
> 2,000 years ago, some investigators wonder if the system may have a
> third stellar component, Sirius C, with about five percent of Sol's
> mass that implies a spectral type M5-9 in a six-year elliptical orbit
> around Sirius A (Benest and Duvent, 1995). A recent search for faint
> companions using the Hubble Space Telescope found no supporting
> evidence for a large Jupiter or brown dwarf sized object, although the
> observed positions of Sirius AB -- Gl 244 AB -- differed from published
> orbital elements (Schroeder et al, 2000).
>
> http://www.tcnj.edu/~pfeiffer/AST261Chap3.html
> 4. The majority (about 80 t0 85%) of stars in the solar neighborhood
> are binary stars.
> Single stars like our sol are clearly within the minority.
>
> http://www.siriusresearchgroup.com/articles/ogo3.shtml
> The Sirius Research Group / Email Info@xxxxxxxxxxxxxxxxxxxxxxx
> ~
>
> Life upon Venus offers energy to burn, even though as such it will not
> actually burn within such an O2 starved environment as having been
> hosting a perfectly rational township of a community that includes a
> bridge and a few of your standard rigid airships plus that nifty UFO
> Park-n-Ride Tarmac:
> http://guthvenus.tripod.com/gv-town.htm
> The ESA Russian/China LSE-CM/ISS (Lunar Space Elevator) as situated
> within the ME-L1/EM-L2 zone
> http://guthvenus.tripod.com/lunar-space-elevator.htm
> Venus ETs, Earthly ETs plus a few other somewhat testy topics by; Brad
> Guth / GASA-IEIS
> http://guthvenus.tripod.com/gv-topics.htm
>
> BTW; I've come to realize that other life must have been possible upon
> Venus, at least as of nearly 6 years ago when I'd first interpreted
> upon one of so many radar images (especially of what the 36 look/pixel
> of an 8-bit/pixel worth of roughly 225 m/pixel resolution), as to what
> honestly looks quite community like, although there's also somewhat
> other most interesting natural aspects from such images that doesn't
> quite doesn't jive with the purely hot and nasty sort of roasting world
> as having been artificially painted and otherwise infomercial hyped by
> our MI5/NSA~NASA rusemasters that would like you to believe this is
> entirely my own doings without having a shred of evidence nor having
> made multiple efforts as to sharing with others from the very get-go.
> Of course, I've since come to perceive that our NASA summarily sucks,
> among other nastier if not despicable sorts of things.
>


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