Questions tagged [stellar-remnants]

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14 votes
1 answer

Could it be possible to detect planets from stars that went supernova through the resulting nebula shape?

It ocurred me, if a star with at least one planetary companion undergoes a nova or supernova, we shoud expect the debris to be deflected to some degree, on exit. To ilustrate it, first let's take the ...
ksousa's user avatar
  • 1,099
2 votes
2 answers

Supernova remnant spectral lines

I have some trouble to find which spectral lines are the ones in this SNR N49 fitted spectrum. They are at 1.3 keV, 1.9keV, 2.5keV, 3.2keV, 3.95keV and maybe at 0.65keV and 6.8keV (approximately). ...
martín canullán's user avatar
3 votes
0 answers

Supernova remnant and ejecta "bullet"

I'm making an X-ray analysis of the source SNR N49. It has a magnetar inside of it that is emitting strongly in Soft ([0.2-1.2] keV), Medium ([1.2-2.5] keV), and Hard ([2.5-8.0] keV) bands. I was ...
martín canullán's user avatar
2 votes
1 answer

Do supernova remnant nebula re-collapse into a star?

We know that nebula sometimes collapse into stars. The particles are attracted to the joint gravitational center of the whole nebula. One type of nebula is a supernova remnant nebula. Unlike a normal ...
cowlinator's user avatar
0 votes
1 answer

What actually is the mass? [closed]

Since high school, I've been told that the definition of mass is "quantity of matter" (which is absolutely wrong, I guess). If mass is actually a quantity of matter and it is a measure of ...
Kavin Ishwaran's user avatar
6 votes
2 answers

Is there a way to calculate the mass of of a stellar remnant given the initial mass of the star?

Assume there is a star in a completely empty region of space, away from any outside influence. Is there a way to calculate the mass of a resulting stellar remnant, a white dwarf, neutron star, or ...
Max0815's user avatar
  • 1,862
3 votes
1 answer

What percent of all stars that have lived (up to now) are stellar remnants?

According to this post, I found that about 90% of all stars are main sequence stars. So I am assuming that the other 10% consists of protostars, older giant stars, and stellar remnants. So I'm ...
slowerthanstopped's user avatar
6 votes
1 answer

What's the big deal with WD 1856+534 b?

A few days ago (september 2020) a planet candidate was announced orbiting white dwarf WD 1856+534. Some media outlets announce it as the First Possible ‘Survivor’ Planet around a white dwarf, while ...
Rafael's user avatar
  • 163
2 votes
2 answers

What kind of radiation do supernova remnants emit?

Do supernova remnants emit EM radiation? Moreover can neutrinos be emitted by these remnants?
learner's user avatar
  • 341
8 votes
2 answers

Properties of low-mass stellar remnants vs the Earth

How does the Earth differ from a (low-mass) stellar remnant, which has stopped fusion and the outer layers of which have been blown away? Could a stellar remnant end up with a similar relative ...
P Varga's user avatar
  • 190
2 votes
1 answer

Does a kilonova leave a high mass remnant?

My understanding of Type Ia supernovae is that they are expected, in most cases, to destroy the white dwarf(s) that went in to them, leaving behind no high density remnants (i.e. no white dwarf, ...
Sean Lake's user avatar
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11 votes
1 answer

Do mixed type remnant collisions produce anything interesting?

The recent detection of a binary neutron star inspiraling and colliding raises an interesting question in my mind. Type Ia supernovae are believed to be caused by white dwarf/regular star pairs and/or ...
Sean Lake's user avatar
  • 2,946
2 votes
2 answers

Does the mass of a collapsing star change?

Does a star, when collapsing into a neutron star, or even a black hole, pick up any significant relativistic mass due to its rapid collapse rate?
change_picture's user avatar