Questions tagged [magnetic-field]
Questions regarding magnetic fields.
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Why has Venus's atmosphere not been stripped away by solar wind?
This answer on Space Exploration to a question about Mars says that one reason Mars has such a thin atmosphere is because it lacks a magnetic field to protect it from the effect of double solar winds.
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What would Aurora look like if no magnetic field was present around the Earth?
The greatest part of the Earth is protected from the Solar wind by its magnetic field. This field makes the wind particles (mainly protons and electrons) the beauty of Aurora appear.
Suppose the ...
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How is it determined that the X-ray and radio intensity come from a magnetic field bridge between two clusters of galaxies?
Gizmodo's Astronomers Spot Mysterious, 10-Million-Light-Year-Long Magnetic Field Connecting Two Galaxy Clusters shows the image below, and Space.com's A Weird 'Radio Bridge' 10 Million-Light Years ...
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Why did Venus not lose its atmosphere without a magnetic field?
It is often stated that the magnetosphere not only shields the planet from cosmic radiation, but also prevents atmospheric loss. Why then did Venus not lose most of its atmosphere if it doesn't have a ...
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Are there collected data about the direction of rotation of black holes and the direction of the magnetic field?
Is there a relation between the direction of rotation of black holes or neutron stars and the magnetic dipole moment of BH or neutron stars? BTW, are there different directions of this two parameters ...
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How much magnetic attraction is there between the Sun and Earth?
How much magnetism is there between the Earth and Sun? Would the distance from the Sun differ for not the Earth iron core and how much?
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Why would a black hole's magnetic hair being short-lived not violate the no-hair conjecture, but long-lived hair would? How long is "long-lived"?
Phys.org's Magnetic 'balding' of black holes saves general relativity prediction says:
There is a potentially hairy threat to the conjecture, though. Black holes can be born with a strong magnetic ...
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Are there neutron stars whose magnetic axis and rotating axis are the same, and if so what will happen?
I know that there's probably a higher chance of having a neutron star that has its magnetic axis inclined to the rotational axis rather than having it perfectly aligned.
If they are not aligned, the ...
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Magnetic fields of peculiar HgMn A type stars
Do HgMn (peculiar A type) stars really possess global magnetic fields? See, for example, this paper by Hubrig et al. from 2012.
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Were effects of a planetary magnetic field reversal observed on other planets than Earth?
From geological records in rocks and minerals we know that the magnetic field of Earth changed its polarity multiple times in the history. See Geomagnetic reversal.
Was a similar process of a ...
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How can only 1 magnetic pole of the Sun change at a time?
I read some news stories about the current Solar maximum and the flipping of the magnetic poles. They say that one of the magnetic poles has switched polarity and the other will switch in about a ...
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Can magnetism escape a black hole?
I know light, and practically nothing but gravity can escape a black hole. My question is: can magnetism escape a black hole?
A couple things that convince me it can are:
Jupiter's magnetic field ...
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Are sunspots vertically displaced from the surrounding photospheric plasma?
While reading a paper on the helioseismology of sunspots (Cameron, et al.), very brief reference is made to the "vertical displacement of a blob of plasma." This caused me to wonder if the emissive ...
user14781
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How do magnetic fields mess with astronomers' observations?
Does anyone else watch 'Dr. Becky' on YouTube?
Her March 'Night Sky News' video, subtitled 'The biggest black hole burp, a wobbly Milky Way & Betelgeuse is brighter' says that...
Obviously lots ...
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What triggers solar flares?
The sun is a big ball of hot plasma which contains free electrons. However, how does the absence of metallic elements in the sun generate the magnetic field to orchestrate these free electrons to ...
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How does an accreting black hole acquire magnetic fields?
There is actually a similar question on this site: Can magnetism escape a black hole?, however the answers do not focus on accretion, which is my main concern, so I start a new one.
In Kip Thorne's ...
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Strength of the relationship between very large solar flares, coronal mass ejections, and solar proton events?
In the years 774-775 and 993-994, there were large peaks in Earth's atmospheric radiocarbon (14C) concentration. While the cause was initially disputed, Mekhaldi et al.'s 2015 study of annually ...
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Are there areas within Jupiter's magnetosphere without powerful radiation?
I know Jupiter has powerful radiation belts, but I'm wondering if there are places within the magnetosphere that are relatively calm. I'm asking about Jupiter (a gas giant we know) because I'm curious ...
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Do planets repel?
I know gravity is the result of mass. Gravity is nothing but the attractive force on a body due to its mass. I have a question that may be silly. In magnetism we have attraction and repulsion. Earth ...
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What exactly are infrared dark clouds and what is the significance of the orientation of their magnetic fields?
In the video Why NASA's SOFIA Telescope On A Plane is "Perfectly Balanced" after about 10:04 SOFIA associate director James Jackson says:
We have a ...
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What do these statements about interstellar magnetic fields really mean?
Quanta Magazine's The Hidden Magnetic Universe Begins to Come Into View is a fascinating review of a rapidly evolving field in astronomy.
It contains some statements that I feel are important to ...
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Can the Hubble expansion inject energy in AGN and quasar outflows?
I found this article about the behavior of quasar outflows in cosmology and how they can create a magnetic field.
In section 2.1.4., the authors say that when a quasar produces a "wave" or ...
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What are Ellerman bombs and how can we identify them?
Have you ever heard about Ellerman bombs? Spaceweather.com talks about them on their news page. You could see some of them around sunspot AR2835:
Ellerman bombs are magnetic explosions about one-...
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Can Magnetars destroy planets?
Magnetars are the most magnetic things in our universe. Because of how powerful their magnetic fields are, they could split every single atom apart from each other in our body.
Because of this could ...
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Is the magnetic field strength of a star predictable from mass, composition, age and angular momentum alone?
This answer to Which stellar properties can we describe as “first principles” in which we can derive the rest? contains an intriguing bit:
That states that composition and mass are the two key ...
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