A bit concerned

[pgc hunter]

Originally Posted by sjastro

It's interesting that Sirius B is one of the most massive white dwarfs known.

It has a solar mass of around 1, white dwarfs are in the range 0.5-0.6.
I wonder where Sirius B has picked up the extra mass.

Regards

Steven

Does Sirius A taste like chicken? If so, I wouldn't be surprised

[renormalised (Carl)]

Originally Posted by sjastro

If Sirius B was gaining mass at the expense of Sirius A, the centre of mass would be moving towards Sirius B and hence the orbital period of Sirius B would decrease. All of this however is very long term.

I imagine if mass is spiraling into Sirius B, then Sirius B should be an irregular variable.

Steven

True...but given the separation of the two (around 20 AU) I can't see anything happening somehow (thankfully!!!!)

If Sirius was losing mass to the WD, the most likely outcome would be we'd have a recurrent nova in the system. Pretty spectacular from 8.6ly away, but we'd be relatively safe...a lot safer than if it really went pop!!!.

Where Type I's normally occur is in binary systems where one of the stars has filled its Roche Lobe (i.e. it's a red giant/supergiant itself) and the WD is sucking gas from a weakly held surface. In systems where the star is a normal MS star (rare), the WD is orbiting almost on top of the primary, so its tidal disturbances of the star are ripping gas off the surface.

[sjastro]

Originally Posted by pgc hunter

Does Sirius A taste like chicken? If so, I wouldn't be surprised

Clearly Sirius A tastes of Dog.

Steven

[renormalised (Carl)]

Originally Posted by sjastro

It's interesting that Sirius B is one of the most massive white dwarfs known.

It has a solar mass of around 1, white dwarfs are in the range 0.5-0.6.
I wonder where Sirius B has picked up the extra mass.

Regards

Steven

The original star was B type, so you're looking at a 4-5 solar mass star. Bigger the star....larger the WD left over. Most normal MS stars produce WD's in the size range you mentioned, although there are quite a few smaller ones.

[erick (Eric)]

Originally Posted by JimmyH155

Eta Carina??

........I hope it to go pop so I can phone up someone and claim the honour of being first ........

I reckon anyone outside or near a window will know. "Hey? How come it's suddenly daytime again???"

[renormalised (Carl)]

Originally Posted by sjastro

Clearly Sirius A tastes of Dog.

Steven

That's right...it ain't "Chookus Major"

[renormalised (Carl)]

Originally Posted by toryglen-boy

Who do you think i am? Colonel Sanders?




you calling me "chicken" ?

Ok "Marty", no need to get your temporal paradox in a twist

[GrahamL]

Would a blast dissperse angularly as you moved away from it ?
by that I mean by the time the chicken wings and dog legs arrive
would they be scattered over a fairly broad area or is this one two close?

Whats that other type of explosion that jetisons material
straight out of the polar axis? of a star( I'm sketchy memeroied here)
bit like looking down a gun barrel if I remember how it was described. Is there a particularly nasty example pointing at us ?

cheers graham

[kinetic (Steve)]

Originally Posted by pgc hunter

8.5 years of drinking and eating meat like an animal

You would HAVE to have rock band DISASTER AREA hired for the party, PGC.
Along with Hotblack Desiato on keyboards.
Did you know he spent a year dead for tax reasons?
They are the loudest band in the universe.
This band is so loud that fans have to listen from a bunker 30 miles
away

for Douglas Adams fans........

Steve

[sjastro]

Originally Posted by nightstalker

Would a blast dissperse angularly as you moved away from it ?
by that I mean by the time the chicken wings and dog legs arrive
would they be scattered over a fairly broad area or is this one two close?

Gamma rays which are high energy photons are scattered over distance. Any intervening matter such as interstellar gas and dust, solar particles etc will absorb some of the photons energy and change the photon's trajectory.

Even the photons themselves collide with each other and scatter.

Whats that other type of explosion that jetisons material
straight out of the polar axis? of a star( I'm sketchy memeroied here)
bit like looking down a gun barrel if I remember how it was described. Is there a particularly nasty example pointing at us ?

Quasars, Seyfert galaxies , galaxies with active centres can shoot off plasma, X-rays, and UV radiation.

Although the mechanism is not fully understood, a rotating black hole is the common denominator with all these beasties. Some of the rotational energy of the black hole is transferred to the photons or particles in the jet.

Regards

Steven

[MrB (Simon)]

Originally Posted by Vars191

.....will it cause a mass extension on earth

How many blokes would really be concerned about a mass extension?

[renormalised (Carl)]

Originally Posted by kinetic

you would have to have rock band disaster area hired for the party, pgc.
Along with hotblack desiato on keyboards.
Did you know he spent a year dead for tax reasons?
they are the loudest band in the universe.
This band is so loud that fans have to listen from a bunker 30 miles
away

for douglas adams fans........ :d

steve

42

[dugnsuz (Doug)]

Originally Posted by MrB

How many blokes would really be concerned about a mass extension?