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A retrospective look at Sirius B in its red supergiant phase



 
 
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Old May 22nd 09, 05:52 PM posted to alt.astronomy,sci.space.policy,sci.space.history,misc.education.science,uk.sci.astronomy
BradGuth
external usenet poster
 
Posts: 21,544
Default A retrospective look at Sirius B in its red supergiant phase

On May 19, 9:27*am, BradGuth wrote:
On Apr 27, 4:47 am, BradGuth wrote:



Red giant stars are many, and yet still a little hard to come by, as
only a few public images of whatever is within 1000 light years seem
to exist that fit within the color saturated eye-candy profiles that
we’ve been taught to accept. *However, the visible spectrum is
extremely limited as to what is otherwise technically accessible from
just above and below our genetically limited and thus inferior visual
spectrum. (seems entirely odd that our human evolution was so careless
in having discarded so much visual capability, in that other creatures
seem to have a far wider visual spectrum capability that includes some
UV and IR)
“Red Giant Star Found to Have Massive Tail”
*http://www.efluxmedia.com/news_Red_G...Have_Massive_T...
*Mira A of several hundred solar radii (UV colorized as bluish): “A
dying star situated 400 light years away from us exhibits an unusual
and massive tail of heated gas that spreads for more than 13 light
years.”
*http://en.wikipedia.org/wiki/Mira
*http://www.nasa.gov/mission_pages/galex/20070815/a.html
Sirius B could have been much like an image of Mira A, except a whole
lot larger (1000 solar radii), as viewed in visible and near IR
*http://xmm.esac.esa.int/external/xmm...osium/173770_m...
Mira A and lots more composite observationology from FAS
*http://www.fas.org/irp/imint/docs/rst/Sect20/A6.html
There are many possibilities, as for how Sirius B used to function as
a truly massive (9 solar mass) star, thereby extremely hot and fast
burning prior to becoming a red supergiant, creating an impressive
planetary nebula phase before ending as the little white dwarf. *For
all we know Sirius B was even a variable kind of red giant and then
perhaps a slow nova flashover phase prior to finishing off as the
white dwarf.
These following examples are probably similar or perhaps representing
a slightly smaller version of what the Sirius star/solar system looked
like once Sirius B had started turning itself from an impressive red
supergiant into a white dwarf of perhaps 1/8th its original mass,
taking roughly 64~96,000 years for this explosive mass shedding phase
to happen. *A few tens of billions of years later is when such a white
dwarf eventually becomes a black dwarf, kind of black diamond spent
star, in that our universe may or may not be quite old enough to
display such examples.
*http://en.wikipedia.org/wiki/Planetary_nebula
*http://en.wikipedia.org/wiki/Helix_Nebula
*http://en.wikipedia.org/wiki/Cat%27s_Eye_Nebula
*http://apod.nasa.gov/apod/ap031207.html
*http://www.uv.es/jrtorres/index6.html
Betelgeuse has been a massive red giant at 20+ fold the mass of our
sun, and likely worth nearly 3 fold the mass of the original Sirius B,
and currently expanded to 1000 solar radii, and it'll be truly
impressive nova whenever it transforms into a white dwarf nearly the
size of Jupiter.
The soon to be renewed and improved Hubble should accomplish the
improved spectrum and resolution of most everything, along with other
existing and soon to be deployed telescopes should give us even better
composite examples of what Sirius B used to look like. *This may give
some of us a better interpretation as to what transpired right next
door to us, as well as having unavoidably contributed to some of what
our solar system has to offer.


Sirius B was quite recently (in cosmological terms of the universe
age) a very impressive red supergiant of 1000 solar radii. *When the
helium flashover phase happened it was a truly significant event that
may have lasted for several minutes, as well as having given off a
good dosage of hard-X-rays and gamma. *Sirius B would also have lost
its tidal radius grip on any number of secondary stars, planets and
moons, that except Sirius C went elsewhere, including a few items that
may have headed towards our relatively passive and nearby solar
system.

Even so, this terrific flashover event should actually still be
visible to us as a secondary/recoil of reflected photons, possibly
even as coming off the original molecular cloud that created Sirius in
the first place, and as such simply can not be too far away unless
having been entirely blown away as though uniformly disbursed by the
Sirius B solar wind and subsequent red supergiant phase. *However, the
remaining 99.999% of that molecular cloud still has to exist
somewhere.

Detecting such old photons is much like having an eye-candy time
machine that's always looking back in time, whereas the repaired and
upgraded Hubble should prove as being suited for this worthwhile task
of detecting such old secondary/recoil flashover photons, though newer
astronomy instruments as having been deployed by ESA would certainly
be many tens of fold more sensitive and otherwise specifically capable
of finding this most recent of molecular cloud remainders.

However, seems odd that our own sun would not have attracted some
portion of that very same hydrogen and helium saturated cloud, that is
if there ever was any such molecular cloud of perhaps 120,000 solar
masses to begin with.


The mass of our universe stays exactly the same, no matters what takes
place, but as a whole we seem to keep getting more and more of them
photons (mostly of those we can’t see) and possibly even more of those
free/rogue electrons and positrons. However, is there any limit in
physics as to how many photons this universe or any given cubic light
year can contain?

In addition to whatever a dense molecular cloud of hydrogen and helium
represents as an average population of 1e6/cm3 (1e12/m3) for creating
stars and essentially everything else, how about we start off fairly
small in order to figure out what the maximum number of photons/sec
that a given cubic second or cubic light year (3e8^3 or 27e24 m3) can
possibly contain.

Notice how certain faith-based mindsets (mostly of the Old Testament
and politically skewed types of the republican pretend-Atheist kind)
are continually acting oblivious and/or dumbfounded as to most of
everything around us, especially if such involves anything of ETs or
bad and otherwise unexpectedly spendy as hell. Of course their not
willing to share the truth about much of anything doesn’t exactly
help.

Secondly, notice how they can't ever manage to say with any expertise
or much less supercomputer simulated within peer replicated results,
as to where exactly the very recent creation/birth of the truly
massive Sirius star/solar system took place, other than insisting it
was supposedly nowhere nearby our solar system. However, I find these
highly subjective and typically obfuscation loaded kinds of replies
somewhat disingenuous and/or less believable than LeapFrog published
infomercial physics and their eye-candy science stuff, but then that’s
understandably setting our ‘no child left behind’ of uneducated truth
standards a bit high.
~ BG
  #2  
Old May 23rd 09, 04:13 AM posted to alt.astronomy,sci.space.policy,sci.space.history,misc.education.science,uk.sci.astronomy
BradGuth
external usenet poster
 
Posts: 21,544
Default A retrospective look at Sirius B in its red supergiant phase

On May 22, 9:52*am, BradGuth wrote:
On May 19, 9:27*am, BradGuth wrote:



On Apr 27, 4:47 am, BradGuth wrote:


Red giant stars are many, and yet still a little hard to come by, as
only a few public images of whatever is within 1000 light years seem
to exist that fit within the color saturated eye-candy profiles that
we’ve been taught to accept. *However, the visible spectrum is
extremely limited as to what is otherwise technically accessible from
just above and below our genetically limited and thus inferior visual
spectrum. (seems entirely odd that our human evolution was so careless
in having discarded so much visual capability, in that other creatures
seem to have a far wider visual spectrum capability that includes some
UV and IR)
“Red Giant Star Found to Have Massive Tail”
*http://www.efluxmedia.com/news_Red_G...Have_Massive_T...
*Mira A of several hundred solar radii (UV colorized as bluish): “A
dying star situated 400 light years away from us exhibits an unusual
and massive tail of heated gas that spreads for more than 13 light
years.”
*http://en.wikipedia.org/wiki/Mira
*http://www.nasa.gov/mission_pages/galex/20070815/a.html
Sirius B could have been much like an image of Mira A, except a whole
lot larger (1000 solar radii), as viewed in visible and near IR
*http://xmm.esac.esa.int/external/xmm...osium/173770_m...
Mira A and lots more composite observationology from FAS
*http://www.fas.org/irp/imint/docs/rst/Sect20/A6.html
There are many possibilities, as for how Sirius B used to function as
a truly massive (9 solar mass) star, thereby extremely hot and fast
burning prior to becoming a red supergiant, creating an impressive
planetary nebula phase before ending as the little white dwarf. *For
all we know Sirius B was even a variable kind of red giant and then
perhaps a slow nova flashover phase prior to finishing off as the
white dwarf.
These following examples are probably similar or perhaps representing
a slightly smaller version of what the Sirius star/solar system looked
like once Sirius B had started turning itself from an impressive red
supergiant into a white dwarf of perhaps 1/8th its original mass,
taking roughly 64~96,000 years for this explosive mass shedding phase
to happen. *A few tens of billions of years later is when such a white
dwarf eventually becomes a black dwarf, kind of black diamond spent
star, in that our universe may or may not be quite old enough to
display such examples.
*http://en.wikipedia.org/wiki/Planetary_nebula
*http://en.wikipedia.org/wiki/Helix_Nebula
*http://en.wikipedia.org/wiki/Cat%27s_Eye_Nebula
*http://apod.nasa.gov/apod/ap031207.html
*http://www.uv.es/jrtorres/index6.html
Betelgeuse has been a massive red giant at 20+ fold the mass of our
sun, and likely worth nearly 3 fold the mass of the original Sirius B,
and currently expanded to 1000 solar radii, and it'll be truly
impressive nova whenever it transforms into a white dwarf nearly the
size of Jupiter.
The soon to be renewed and improved Hubble should accomplish the
improved spectrum and resolution of most everything, along with other
existing and soon to be deployed telescopes should give us even better
composite examples of what Sirius B used to look like. *This may give
some of us a better interpretation as to what transpired right next
door to us, as well as having unavoidably contributed to some of what
our solar system has to offer.


Sirius B was quite recently (in cosmological terms of the universe
age) a very impressive red supergiant of 1000 solar radii. *When the
helium flashover phase happened it was a truly significant event that
may have lasted for several minutes, as well as having given off a
good dosage of hard-X-rays and gamma. *Sirius B would also have lost
its tidal radius grip on any number of secondary stars, planets and
moons, that except Sirius C went elsewhere, including a few items that
may have headed towards our relatively passive and nearby solar
system.


Even so, this terrific flashover event should actually still be
visible to us as a secondary/recoil of reflected photons, possibly
even as coming off the original molecular cloud that created Sirius in
the first place, and as such simply can not be too far away unless
having been entirely blown away as though uniformly disbursed by the
Sirius B solar wind and subsequent red supergiant phase. *However, the
remaining 99.999% of that molecular cloud still has to exist
somewhere.


Detecting such old photons is much like having an eye-candy time
machine that's always looking back in time, whereas the repaired and
upgraded Hubble should prove as being suited for this worthwhile task
of detecting such old secondary/recoil flashover photons, though newer
astronomy instruments as having been deployed by ESA would certainly
be many tens of fold more sensitive and otherwise specifically capable
of finding this most recent of molecular cloud remainders.


However, seems odd that our own sun would not have attracted some
portion of that very same hydrogen and helium saturated cloud, that is
if there ever was any such molecular cloud of perhaps 120,000 solar
masses to begin with.


The mass of our universe stays exactly the same, no matters what takes
place, but as a whole we seem to keep getting more and more of them
photons (mostly of those we can’t see) and possibly even more of those
free/rogue electrons and positrons. *However, is there any limit in
physics as to how many photons this universe or any given cubic light
year can contain?

In addition to whatever a dense molecular cloud of hydrogen and helium
represents as an average population of 1e6/cm3 (1e12/m3) for creating
stars and essentially everything else, how about we start off fairly
small in order to figure out what the maximum number of photons/sec
that a given cubic second or cubic light year (3e8^3 or 27e24 m3) can
possibly contain.

Notice how certain faith-based mindsets (mostly of the Old Testament
and politically skewed types of the republican pretend-Atheist kind)
are continually acting oblivious and/or dumbfounded as to most of
everything around us, especially if such involves anything of ETs or
bad and otherwise unexpectedly spendy as hell. *Of course their not
willing to share the truth about much of anything doesn’t exactly
help.

Secondly, notice how they can't ever manage to say with any expertise
or much less supercomputer simulated within peer replicated results,
as to where exactly the very recent creation/birth of the truly
massive Sirius star/solar system took place, other than insisting it
was supposedly nowhere nearby our solar system. *However, I find these
highly subjective and typically obfuscation loaded kinds of replies
somewhat disingenuous and/or less believable than LeapFrog published
infomercial physics and their eye-candy science stuff, but then that’s
understandably setting our ‘no child left behind’ of uneducated truth
standards a bit high.


Same mass = more and more photons. What gives?

Where's the secondary/recoil of reflected photons from the Sirius B
helium flashover?

~ BG
 




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