# Questions tagged [neutron-stars]

A neutron star is the final stage of the graviational collapse of a massive supergiant star. Except for black holes, neutron stars are the smallest and densest currently known class of stellar objects

383 questions
Filter by
Sorted by
Tagged with
38 views

### Solving TOV equations that describes neutron stars in modified f(R, T) gravity

Sorry for the long post, tldr at bottom. I'm trying to use standard RK4 code in C/C++ to solve a coupled system of 2 modified TOV equations in f(R,T) gravity and reproduce some of the results of this ...
• 21
142 views

### How can we model the primordial Universe while the interior of a neutron star and comparable states of matter are still mostly unknown?

There is something I never quite understood about the physics of the primordial Universe. There are states of matter at high temperature/high pressure that are still, today, poorly understood. The ...
• 1,109
1 vote
70 views

### Numerically solving frame-dragging equation in Hartle-Thorne formalism

I'm trying to write a Python code to implement Hartle-Thorne approximation formalism for rotating neutron stars. In this formalism, I am required to solve the following second order differential ...
• 13
111 views

### Are pure quark stars possible?

Has it been established that structures formed from quarks (like quark stars: https://en.wikipedia.org/wiki/Quark_star) are possible in principle ? I have read about the possibility that inside ...
• 2,466
53 views

### Strength of a phase-transition

I'm currently studying neutron stars for a summer research project, and it uses the terms 'weak' and 'strong' transition for nuclear matter in its literature. Can someone explain (in terms that a ...
47 views

### Mass formation of a neutron star Vs White dwarf

I have been researching the different outcomes of a star's death. I understand that the main factor is the star's mass at the end of its life, along with others such as its metallicity. Well, the ...
• 161
550 views

### Does the formation of a neutron star always require a supernova explosion?

Is a supernova explosion an essential condition for the formation of a neutron stars?
• 141
139 views

### Supressing proton and neutron decay?

I was wondering whether the decay of neutrons and protons (if they happen to be able to decay, as it is predicted by some GUTs) could be avoided in some cases. Let's begin with neutrons: In principle ...
• 2,466
62 views

• 2,908
241 views

1 vote
68 views

### Is it possible for two neutron star to merge into a larger neutron star?

Is it possible for two low mass neutron star to merge into a larger neutron star, or will this always result in a black hole? What would this event likely look like?
• 2,908
43 views

### Do gravitational waves change the period of spinning neutron stars?

I imagine that gravitational waves can increase and decrease the diameter of a neutron star as they pass through it.Do they alter the speed at which it spins?
68 views

### Approximation concerning gravitational waves from binary neutron star

I'm interested in studying two neutron stars orbiting each other and producing gravitational waves. In textbooks the calculation for the power of the radiation is done by considering the neutron stars ...
53 views

### If a star ran out all hydrogen fuel and still could maintain equilibrium by some outer forces, what would it then look like without its gases?

We know when a star runs out of its main hydrogen fuel, thermonuclear fusion ceases. Gravity stars pulling it and there is no force anymore to counter the gravity so the star crashes or dies at a ...
156 views

### Pulsar rotation

Pulsars are said to be spinning objects from which two beams of radiation emanate in opposite directions. Observed pulse rates range from on the order of one pulse per second to hundreds of pulses per ...
162 views

### Neutron star vs. Islands of stability

"Neutron stars" are said to be almost entirely composed of neutrons. The islands of stability principle recognizes an upper limit to the number of neutrons that can be introduced to an atom. ...
256 views

### Why is magnetic flux conserved in neutron star formation?

So in studying the topic of neutron stars I've encountered one particular detail that I've found no good explanation for. Most resources I have found say that the strong magnetic fields of neutron ...
570 views

### How can there be superconducting protons and neutrons inside an incredibly hot neutron star?

It is hard enough for me to try to wrap my head around the idea of superconducting particles other than electrons (especially neutrons!), .... Given the insanely hot temperatures inside a neutron star ...
• 4,509
77 views

### Do the free neutrons in a neutron star sometimes decay and immediately re-form?

Is there any way of confirming this, one way or the other? Would it affect any of the star's 'observeables', so to speak? I know that two similar questions are up on Stack Exchange-physics, and I ...
• 4,509
56 views

### What portion of a neutron star's mass is in the form of gravitational energy? [closed]

The reason this question is being asked is that in the case of black holes around 100% of their mass is stored in their gravitational field and I am wondering if neutron stars come close. It is known ...
• 1,534
1 vote
23 views

### What are phenomenological models and ab-initio models in terms of dense matter?

I've tried to grasp the concept of phenomenological and microscopical ab-initio models when it comes to EOS of neutron star matter . I can understand the meaning of them in general, but I find it ...
1 vote
97 views

### How does a neutron star "reheat" itself by ohmic dissipation of its magnetic field?

@ProfRob's answer to Neutron star accurate visualization ends with: ...How their temperatures evolve after this is highly uncertain and none have been observed. The problem is that neutron stars have ...
• 6,263