Discovery of the companions of millisecond pulsars

Discovery of the companions of millisecond pulsars
An optical image of the globular cluster, 47 Tucanae. Astronomers have identified the orbiting companions to five millisecond pulsars in this cluster and found them all to be white dwarf stars. Credit: South African Astronomical Observatory

When a star with a mass of roughly ten solar masses finishes its life, it does so in a spectacular explosion known as a supernova, leaving behind as remnant "ash" a neutron star. Neutron stars have masses of one-to-several Suns, but they are tiny in size, only tens of kilometers. Neutron stars spin rapidly, and when they have associated rotating magnetic fields to constrain charged particles, these particles emit electromagnetic radiation in a lighthouse-like beam that can sweep past the Earth with great regularity every few seconds or less. Such neutron stars are known as pulsars. Pulsars are dramatic and powerful probes of supernovae, their progenitor stars, and the properties of nuclear matter under the extreme conditions that exist in these stars.

Some pulsars called millisecond pulsars spin much more quickly, and astronomers have concluded that in order to rotate so rapidly these objects must be regularly accreting material from a nearly companion star which in a binary orbit with it; the new material helps to spin-up the neutron star, which normally would gradually slow down. There are more than 200 known millisecond pulsars. An understanding of these pulsars has been hampered, however, by the fact that only about a dozen of them have had their companion stars directly detected and studied.

CfA astronomers Maureen van den Berg, Josh Grindlay, and Peter Edmonds and their colleagues used ultraviolet images from Hubble to identify the companion stars to two located in the globular cluster 47 Tucanae. They were also able to confirm a previous but tentative identification, and to confirm two more. They report that each is of these companions is a – an evolved star that can no longer sustain nuclear burning and which has shrunk to a fraction of its original radius. Each of these pulsars spins more than 120 times per second, and the companions orbit quite closely with periods ranging from only 0.43 days to 1.2 days, close enough to easily satisfy the requirements needed for this kind of cosmic cannibalism as the pulsars gradually feed on material from the white dwarfs. The new work significantly increases the number of identified and characterized millisecond companions.


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More information: "Discovery of Near-Ultraviolet Counterparts to Millisecond Pulsars in the Globular Cluster 47 Tucanae," MNRAS 453, 2707, 2015. arxiv.org/abs/1508.05291
Citation: Discovery of the companions of millisecond pulsars (2015, September 28) retrieved 19 May 2019 from https://phys.org/news/2015-09-discovery-companions-millisecond-pulsars.html
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Sep 29, 2015
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Sep 29, 2015
Our theory... hypothesis
please learn the difference between these two when posting, otherwise you look ignorant (and more than a lot foolish)
https://en.wikipe...c_theory

https://en.wikipe...pothesis


Sep 29, 2015
"When a star with a mass of roughly ten solar masses finishes its life, it does so in a spectacular explosion known as a supernova, leaving behind as remnant "ash" a neutron star."

Corection:

Our theory assume that when a star with a mass of roughly ten solar masses finishes its life, it does so in a spectacular explosion known as a supernova, leaving behind as remnant "ash" a neutron star.

This is hypothesis. Not fact.

Thanks dude. Now, the people's understanding capabilities should improve. Duh..

Sep 29, 2015
This comment has been removed by a moderator.

Sep 29, 2015
"Now, the people's understanding capabilities should improve. "

Fundamental processes in nature are closed book to us. We confused the direction of our development, highlighting the matter instead of spirit.
Be objective. Not a ignorant dreamer.

Sep 30, 2015
This is hypothesis. Not fact.

Harvard list of recent supervnovae +observed with telescopes+ :
http://www.cbat.e...vae.html

You'd think they'd notice if there weren't stars before the explosions but not after, yes?

List of neutron star and their energies +observed with telescopes+ from the Max Planck Institute:
http://www3.mpifr...ses.html


Sep 30, 2015
@Captain...Point some serious scientific sources. Wikipedia is not serious source....
@vikoTROLL
and yet, if you had bothered to read the links, you would have seen the references like:
http://www.nap.ed...pter/2#2

http://www.aaas.o...da.shtml

http://plato.stan...heories/

as well as noticed the following:
https://en.wikipe...theories

also note, the definitions above on Wiki are also general definitions that are well known in science and you can find them defined in ANY science text and they'll state the same information as above

the definitions can also be found at various dictionaries ( http://dictionary...eory?s=t ) or in encyclopedia if you want to pay to get the same information that Wiki will give free

feel free to provide a refute if you can

Sep 30, 2015
@vikoTROLL cont'd
Fundamental processes in nature are closed book to us
obviously you've never heard of QM or QED?
you know... the theories that make your computer possible?
We confused the direction of our development, highlighting the matter instead of spirit
considering there is absolutely NO empirical evidence for a "spirit" whereas we have volumes of validated empirical evidence and experimentation supporting facts we know about the physical world (matter), from QM, QED and physics to Zoology, then i would state that your comment is not only wrong, but stupid

there is science, and there is religion. Science is based upon facts and experiments that can be replicated, etc... you know... EVIDENCE
religion is a set of rules (most often surrounding a faith, which is a belief WITHOUT evidence) that is designed to control others with tenets that cause prejudice and stir hate

there is no room for religion in science

Sep 30, 2015
Be objective. Not a ignorant dreamer.
@viko_mx

So, what's holding you back?
Hmm, of course... ignorance and prejudice.

Oct 04, 2015
@animah

So where is the connection between the lists of recent super novas and the list of observes neutron stars energies? These two are not related in any way.

Oct 04, 2015
The issue here is not about magic power but about control over foundation of physical reality in which we live, which is possible only for the Creator.

Oct 04, 2015
but about control over foundation of physical reality in which we live, which is possible only for the Creator
@vikoTROLL
1- this is, by definition, "magic power"
2- which creator? yours? or the egyptian one? the lakota creator? Usen? Mato? Cherokee?
this is the problem with you religious fanatics: you assume YOUR religion is more important or better than (bigger, faster, more powerful, etc) any other religion... except, if you want to assume just based upon success and longevity, then xtians are FAR behind the pack in belief

last point: just becuase it is YOUR belief doesn't mean it is real
it doesn't even mean it is ANYONE ELSE'S belief... this is most evident in your xtian factions all over the world

and just so you know-
you've directly violated at least TWO of the ten commandments of your own religion, as well as ignored your own biblical teachings!
so if it is not important for even YOU to take seriously, why should anyone else?

Oct 04, 2015
Where is the connection between QM and semiconductor making technology? Photo lithography and ion implantation have nothing to do with QM.
Is there anyone who understands quantum mechanics and if so could you please explain why this theory works with statistical formulations?

Oct 04, 2015
No. There is no magic. As we cad do microprocessors with the help of our knowledge and intelligence, so the Creator ca do new physical reality according to His ideas and will. There is no magic at all. Just different technological levels and levels of access to physical reality.

Oct 04, 2015
Is there anyone who understands quantum mechanics and if so could you please explain why this theory works with statistical formulations?

START HERE: http://www.amazon...on+truck

https://www.goodr...Hurt_You

https://www.goodr...echanics

https://www.goodr...universe

https://www.goodr...ystified

Oct 04, 2015
No. There is no magic.
@vikoTROLL
yep. that's what i've been trying to tell you... your RELIGION is completely based upon the ASSumption of a sky faerie who can auto-magically control everything in the universe: this is MAGIC by definition
thus, ALL stories in the bible which are "eyewitness" are nothing more than fantastical delusions of magical thinking
so the Creator ca do new physical reality according to His ideas and will
and this is called ASSumption and personal conjecture without evidence
you cannot prove this any more than you can prove unicorns ate my cereal this morning
Just different technological levels and levels of access to physical reality
ASSumption that your sky faerie is an advanced life form with levels of control beyond our knowledge is called MAGIC THINKING unless you can prove it

Also note: if said faerie was advanced to that point, it would still mean we are also advancing to said point with science (aka-becoming your god)

Oct 04, 2015
Where is the connection between QM and semiconductor making technology? Photo lithography and ion implantation have nothing to do with QM.

100% wrong. Solid state electronics is based on solid state physics, which is QM applied to solids. Without QM we wouldn't even be doing lithography or ion implantation.
Is there anyone who understands quantum mechanics and if so could you please explain why this theory works with statistical formulations?

As far as I know no one knows.

Oct 04, 2015
No. There is no magic. As we cad do microprocessors with the help of our knowledge and intelligence, so the Creator ca do new physical reality according to His ideas and will. There is no magic at all. Just different technological levels and levels of access to physical reality.

You do not know the difference between physics and magic. Indeed,
"Any sufficiently advanced technology is indistinguishable from magic."
― Arthur C. Clarke, Profiles of the Future: An Inquiry Into the Limits of the Possible

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