Tagged Questions

6
votes
2answers
124 views

What stabilizes neutorns against beta decay in a neutron star?

Free neutrons are known to undergo beta decay with a half-life of slightly above 10 minutes. Binding with other nucleons stabilizes the neutrons in an atomic nucleus, but only if the fraction of ...
0
votes
1answer
38 views

Conversion of a star

I need to know what would happen to a star that has size 2 times the solar mass. I guess it would either be a neutron or red giant. Is that right?
7
votes
3answers
158 views

Are Neutron stars transparent?

Neutrons have no charge so they would not, I think, interact with photons. Would a neutron star be transparent?
2
votes
2answers
73 views

Magnetic Pole Emission from Pulsars

I've been reading up on some pulsar emission theory (admittedly written in the 70's and 80's, but I figured that's a good place to start), namely this review by Curtis Michel as well as the book Black ...
8
votes
2answers
156 views

Stellar winds from neutron stars

It seems that this question has not really been explored in the literature. Do isolated neutron stars (which do not accrete material) emit stellar wind? If yes, what composition would it have? If yes, ...
0
votes
1answer
67 views

Regarding binary systems

Are binary systems (in case of stars and other celestial bodies) more favorable than independent existence? I've been going through an article regarding pulsars, where it was stated that 'many pulsars ...
0
votes
1answer
59 views

Gravity and Magnetism on Stars

I am familiar with the fact that Magnetars have a really strong magnetic field and an ordinary star such as the Sun has a very strong gravitational field. But what about the opposite? What is the ...
5
votes
3answers
280 views

Do neutron stars reflect light?

The setup is very simple: you have a regular ($1.35$ to $2$ solar masses) evolved neutron star, and you shine plane electromagnetic waves on it with given $\lambda$. Very roughly, what shall be the ...
9
votes
1answer
57 views

Introduction to neutron star physics

I enjoy thinking about theoretical astrophysics because I want to understand black holes. Given that no one understands black holes, I like to ponder the nearest thing to a black hole: a neutron star! ...
10
votes
0answers
30 views

What allows the modified Urca process to work at lower density than direct Urca in neutron star cooling? [duplicate]

Possible Duplicate: What allows the modified Urca process to work at lower density than direct Urca in neutron star cooling? This comes from an unanswered question over at physics.se: The ...
1
vote
1answer
376 views

Neutron star material

I've read on NASA's page on neutron star that one teaspoonful of that star would weigh over 20 billion ton on Earth. If it was somehow possible to bring it to earth would it: A) Burn and disappear ...
1
vote
2answers
191 views

What about the neutron stars with CMB temperature as dark matter?

Inspired by How do we know that dark matter is dark? and What is the temperature of the surface and core of a neutron star formed 12 billion years ago now equal to?
3
votes
1answer
330 views

neutrinos by formation of “neutron pairs”

Here : http://www.newscientist.com/article/dn20084-neutron-star-seen-forming-exotic-new-state-of-matter.html are news on superfluidity in a neutron star. The necessary bosons they say are pairs of ...
4
votes
2answers
140 views

What is a magnetised neutron star?

I heard the term the other day, but it seems strange to me. My understanding is that neutron stars are made up of neutrons; and neutrons (having no charge) shouldn't be magnetised.
3
votes
3answers
829 views

How neutron stars burn ? Is it decay or fusion or something else?

What makes it burn, what kind of fusion/decay is happening there ? Another question is, what suppose to happen with neutron star on long run ? What if it cools, then what degenerated matter looks ...
3
votes
2answers
264 views

What is the temperature of the surface and core of a neutron star formed 12 billion years ago now equal to?

In what part of the spectrum is it radiating? In the infrared, in the microwave? Or is not radiating anymore at all? In russian: Чему сейчас равна температура поверхности и ядра нейтронной звезды, ...
4
votes
2answers
717 views

Is it possible that all neutron stars are actually pulsars?

I'm assing that what I've been told is true: We can only detect pulsars if their beam(s) of electromagnet radiation is directed at Earth. That pulsars are the same as neutron stars only they emit ...