Astronomers May Have Solved the Mystery Surrounding Blue Supergiant Stars
Video Credit: Wibbitz Top Stories - Duration: 01:31s - Published
Astronomers May Have Solved the Mystery Surrounding Blue Supergiant Stars
Astronomers May Have Solved, the Mystery Surrounding , Blue Supergiant Stars.
'Newsweek' reports that astronomers now believe
that some of the brightest and hottest stars in existence
may be the result of collisions between two other stars.
Scientists have long sought to determine
how these intensely bright stars,
known as blue supergiants, are formed.
.
According to a new paper published by
'The Astrophysical Journal Letters,' scientists
suggest that blue supergiants are the result
of two binary stars merging into one.
Blue supergiants, which are about 16 to 40
times the mass of our sun, are some of
the most massive stars in the universe.
.
Their intensely hot surface temperatures
are often two to five times hotter than our
sun and over 10,000 times more luminous.
'Newsweek' reports that the latest research
looked at 59 early B-Type blue supergiant
stars in the Large Magellanic Cloud,
a satellite galaxy of our own Milky Way galaxy.
.
We simulated the mergers
of evolved giant stars with
their smaller stellar companions
over a wide range of parameters,
taking into account the interaction
and mixing of the two stars
during the merger, Athira Menon, study author and an astrophysicist at the Instituto
de Astrofísica de Canarias (IAC) in Spain, via 'Newsweek'.
The newly-born stars
live as blue supergiants
throughout the second
longest phase of a star's life,
when it burns helium in its core, Athira Menon, study author and an astrophysicist at the Instituto
de Astrofísica de Canarias (IAC) in Spain, via 'Newsweek'.
The results obtained explain
why blue supergiants are found
in the so-called 'evolutionary gap'
from classical stellar physics,
a phase of their evolution where
we would not expect to find stars, Artemio Herrero, study co-author and a researcher at the Instituto
de Astrofísica de Canarias (IAC) in Spain, via 'Newsweek'.
The team reportedly hopes to continue its
investigation into the role that merging stars
could play in the formation of galaxies, as well as how
blue supergiants form neutron stars or black holes.
.
The team reportedly hopes to continue its
investigation into the role that merging stars
could play in the formation of galaxies, as well as how
blue supergiants form neutron stars or black holes.
Astronomers Think Powerful , Magnetic Winds Drive Growth , of Supermassive Black Holes.
'Newsweek' reports that scientists may have
unraveled the mystery of how supermassive
black holes are able to become so massive.
According to a new paper, a powerful magnetic
wind, comparable to water swirling around
a drain, is what allows these massive cosmic
phenomena to reach such immense sizes.
A supermassive black hole is typically millions to
billions of times more massive than our own sun
and is often found at the center of most galaxies. .
The paper, which was published in the journal 'Astronomy
and Astrophysics,' focused on the black hole at the
center of a galaxy about 120 million light-years from Earth.
This galaxy, known as ESO320-G030, is much more
active than our own Milky Way, with a rate of star
formation 10 times that of our own galaxy.
Using the Atacama Large Millimeter Array (ALMA) telescope,
researchers found a strong, rotating, magnetized
wind spinning around the center of the black hole.
Using the Atacama Large Millimeter Array (ALMA) telescope,
researchers found a strong, rotating, magnetized
wind spinning around the center of the black hole.
Since this galaxy is very
luminous in the infrared,
telescopes can resolve
striking details in its center. , Susanne Aalto, study co-author and a professor
of radio astronomy at Chalmers University
of Technology, via 'Newsweek'.
'Newsweek' reports that the team now hopes to observe the
centers of other galaxies to confirm if this process is what
enables a supermassive black hole's immense growth.
Far from all questions about this
process are answered. In our
observations we see clear evidence
of a rotating wind that helps
regulate the growth of the
galaxy's central black hole. , Mark Gorski, study co-author and an astronomer
at Chalmers University of Technology and
Northwestern University, via 'Newsweek'.
Now that we know what to look for,
the next step is to find out how
common a phenomenon this is.
And if this is a stage which all
galaxies with supermassive
black holes go through,
what happens to them next?, Mark Gorski, study co-author and an astronomer
at Chalmers University of Technology and
Northwestern University, via 'Newsweek'
Credit: Wibbitz Top Stories Duration: 01:31Published
Scientists Use 'Dyson Sphere' , Signature to Search for , Potential Alien Life.
Decades ago, physicist Freeman Dyson theorized that a
shell made of solar panels that surrounds a star would be
the ultimate energy solution for an advanced civilization. .
One should expect that, within a few
thousand years of its entering the stage
of industrial development, any intelligent
species should be found occupying an
artificial biosphere which completely
surrounds its parent star, Freeman Dyson, 1960 paper, via CNN.
CNN reports that the concept took
hold and the hypothetical megastructures
have come to be called Dyson spheres. .
At the time, Dyson suggested that
these spheres would emit waste heat
as detectable infrared radiation.
The British American physicist suggested
that this unique radiation signature could
be a way of finding extraterrestrial life. .
It would be much more
rewarding to search directly
for intelligence, but technology
is the only thing we have
any chance of seeing, Matías Suazo, Lead study author and a doctoral student
in the department of physics and astronomy
of Uppsala University in Sweden, via CNN.
A new study searched five million stars in the Milky Way
galaxy to find seven candidates that could potentially
be home to an advanced civilization's Dyson sphere.
It’s difficult for us to find
an explanation for these sources,
because we don’t have enough
data to prove what is the real
cause of the infrared glow, Matías Suazo, Lead study author and a doctoral student in
the department of physics and astronomy of
Uppsala University in Sweden, via CNN.
It’s difficult for us to find
an explanation for these sources,
because we don’t have enough
data to prove what is the real
cause of the infrared glow, Matías Suazo, Lead study author and a doctoral student in
the department of physics and astronomy of
Uppsala University in Sweden, via CNN.
They could be Dyson spheres,
because they behave like our
models predict, but they could
be something else as well, Matías Suazo, Lead study author and a doctoral student
in the department of physics and astronomy
of Uppsala University in Sweden, via CNN.
The team's findings were published
in the journal 'Monthly Notices of
the Royal Astronomical Society.'
Credit: Wibbitz Top Stories Duration: 01:31Published
Gaia Telescope Reveals Precise , Date of the Milky Way's Last , Act of Galactic Cannibalism.
Space.com reports that the latest findings from the Gaia
space telescope suggest that our Milky Way Galaxy may
have cannibalized a smaller galaxy relatively recently. .
The last major collision between the Milky Way
and another galaxy appears to have occurred billions
of years closer to now than previously believed.
Scientists have long known that the
Milky Way was formed through a series
of violent collisions with other galaxies. .
These massive collisions distribute stars
from the consumed galaxy throughout the
halo that surrounds the Milky Way's main disk. .
Galactic cannibalism sends "wrinkles"
through the galaxy, impacting different
families of stars in a number of ways.
Gaia now looks to retell the story of the
Milky Way by quantifying those wrinkles.
We get wrinklier as we age,
but our work reveals that the
opposite is true for the Milky Way.
It’s a sort of cosmic Benjamin Button,
getting less wrinkly over time. , Thomas Donlon, Study team leader of the Rensselaer Polytechnic
Institute and University of Alabama scientist, via Space.com.
By looking at how these
wrinkles dissipate over time,
we can trace when the Milky Way
experienced its last big crash –
and it turns out this happened billions
of years later than we thought, Thomas Donlon, Study team leader of the Rensselaer Polytechnic
Institute and University of Alabama scientist, via Space.com.
Astronomers have only been aware of these
wrinkles since Gaia discovered them in 2018. .
The latest findings represent the first time they have
been extensively investigated to find the
precise timing of the collision that spawned them.
Credit: Wibbitz Top Stories Duration: 01:30Published
Red Carpet Fashion , at the 2024 Oscars.
Red Carpet Fashion , at the 2024 Oscars.
The 96th Academy Awards
took place on March 10.
The 96th Academy Awards
took place on March 10.
Here's a look at..
Credit: Wibbitz Top Stories Duration: 01:30Published
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