All Questions
Tagged with pulsar astrophysics
9 questions
13
votes
2
answers
1k
views
Why are the magnetic poles of a pulsar so far off the rotational axis, yet stable?
My understanding is that a pulsar is a neutron star whose magnetic poles don't coincide with the rotational poles and whose magnetic poles sweep through Earth (allowing us to hear radio noise).
If we ...
- 301
9
votes
2
answers
447
views
Do the neutrons in neutron stars emit the radio waves?
Neutrons can, especially in extreme circumstances (and large concentrations) emit electromagnetic radiation. I specifically asked about this in Physics S.E. Has a free neutron ever been shown to ...
- 5,585
6
votes
3
answers
300
views
Can't pulsars and stars be used for gravitational wave measurement?
Suppose that we collected photons from a distant star, and they arrive regularly at 15 photons every microsecond onto a CCD, when a gravity wave bends space time, wouldn't the regular 15 photons graph ...
- 4,354
4
votes
2
answers
795
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Pulsars: How do astronomers measure minute changes in period (~picoseconds per year)?
I've been to some talks that mention how stable the period of a millisecond pulsar is over long periods of time. Recently, it was mentioned that astronomers have calculated the change in period over ...
- 499
4
votes
1
answer
420
views
What exactly is "the rotating lighthouse model" in the context of a double pulsar?
The introduction to Testing the rotating lighthouse model with the double pulsar system PSR J0737-3039A/B (open access) says:
The double pulsar system PSR J0737-3039A/B was discovered by Burgay et al....
- 30.7k
2
votes
2
answers
340
views
Can a pulsar also be a magnetar?
I know this is a simplistic question, but I cannot find a straight answer...
Also, is it possible most or all neutron stars are magnetars and/or pulsars? It's just hard to see all of their properties ...
- 5,585
2
votes
1
answer
598
views
How to determine arrival time delay given dispersion measure?
In an online textbook, the following formula is given to calculate the arrival time delay between two frequencies, $v_1, v_2$ in a dispersed radio pulse:
$$t_1 - t_2 = 4.15 \cdot DM [(v_1/\text{GHz})^{...
1
vote
0
answers
141
views
Pulsar signal periodicity detection algorithms?
I am currently working on pulsar signal periodicity detection. Most of the algorithm or paper which i read they use FFT (Fast Fourier Transform) and FFA (Fast Folding Algorithm ). Do we have any other ...
- 11
0
votes
0
answers
178
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How much would you weigh at the equator of the fastest spinning pulsar?
Assuming you have a mass of 70 kg, what would your weight be on the equator of PSR J1748−2446ad?
