Blog 28 Black holes near the center of the Milky Way by award-winning author Mark Kingston Levin PhD.

Figure 1. The supermassive black hole at the center of the Milky Way is surrounded by a swarm of smaller black holes, according to new research. Scientists were able to pinpoint at least 12 black hole binaries, where a black hole is siphoning material from a companion star. Credit: Columbia University.

All Galaxies seem to be held and may be formed with the aid of this massive black at the center. There is also dark matter everywhere holding are worlds from falling apart.

Figure 2. The Hubble Space Telescope shows the heavens in detail.

The researchers can investigate the past like this because of the time it takes light to travel large, cosmic distances. Light quickly fills a room when a lamp turns on, but the light from faraway galaxies can take billions of years to reach the eyes of an observer standing on Earth. So, the objects or events someone sees through a telescope may have happened eons ago. Telescopes, therefore, can act as time machines for scientists.
“We used large amounts of data … to literally slice the universe in cosmic time and time-travel to the distant past with 16 well-defined cosmic-time destinations,” said Sergio Santos, a team researcher at Lancaster University in the United Kingdom, in a recent statement about the findings. [26 Cosmic Photos from the Hubble Space Telescope’s Ultra Deep Field]

Figure 3. Show galaxies some close and some very far each with an average of 200 million stars in each.

Figure 4. The deep field is located above near the big dipper.

This is a map of the cube of space-time covered in the new survey by David Sobral of Lancaster University and the research team. It shows the “look-back time” to the galaxies in billions of years. The circles mark the positions of the 4,000 galaxies from the study. The colors represent the degree of redshift seen. Bluer circles indicate galaxies seen in the more recent past (less redshifted). Green, yellow, orange and red circles indicate successively higher redshifts; they are galaxies that are located progressively further back in time.

Credit: David Sobral
David Sobral, an astrophysics researcher at Lancaster University, led the team of scientists in their work charting out the primitive universe. They spotted these early galaxies using the Subaru Telescope in Hawaii and the Isaac Newton Telescope in the Canary Islands off the coast of northern Africa.

The team searched for distant galaxies emitting Lyman-alpha radiation, an ultraviolet wavelength associated with young galaxies bursting with star formation. Using 16 different narrow- and medium-band filters, the Lancaster-led team of researchers studied the ancient galactic past in a region of the sky in the constellation Sextans, in an area called the COSMOS field.
Their findings provide insights about the early stages of galaxy formation, the researchers said. They found young worlds that were intensely compact and bursting with stars that were bluer and hotter and that had lower amounts of metal elements compared to the stars of today.

“Some of these galaxies should have evolved to become like our own, and thus we are seeing what our galaxy may have looked like 11 [billion] to 13 billion years ago,” researcher Ana Paulino-Afonso, a Ph.D. student in Lancaster and Lisbon, Portugal and co-author on the study, said in the statement.

“The bulk of the distant galaxies we found are only about 3,000 light-years across in size, while our Milky Way is about 30 times larger,” Paulino-Afonso added. “Their compactness likely explains many of their exciting physical properties that were common in the early universe.”

The work was announced April 4 2018 at the European Week of Astronomy and Space Science conference in Liverpool, England. The team also published their findings in two papers in the journal Monthly Notices of the Royal Astronomical Society.

Figure 5. The COSMOS field in the constellation of Sextans is seen here in infrared light. This region is associated with the part of the sky analyzed by David Sobral of Lancaster University and his research team. Credit: ESO/UltraVISTA team/TERAPIX/CNRS/INSU/CASU

The COSMOS field in the constellation of Sextans is seen here in infrared light. This region is associated with the part of the sky analyzed by David Sobral of Lancaster University and his research team.

Credit: ESO/UltraVISTA team/TERAPIX/CNRS/INSU/CASU
Astronomers have produced one of the largest 3D maps of the young universe, where they pinpoint 4,000 early galaxies from the ancient past — many of which may resemble the Milky Way in its infancy.

The researchers can investigate the past like this because of the time it takes light to travel large, cosmic distances. Light quickly fills a room when a lamp turns on, but the light from faraway galaxies can take billions of years to reach the eyes of an observer standing on Earth. So, the objects or events someone sees through a telescope may have happened eons ago. Telescopes, therefore, can act as time machines for scientists.

“We used large amounts of data … to literally slice the universe in cosmic time and time-travel to the distant past with 16 well-defined cosmic-time destinations,” said Sergio Santos, a team researcher at Lancaster University in the United Kingdom, in a recent statement about the findings. [26 Cosmic Photos from the Hubble Space Telescope’s Ultra Deep Field]

Figure 6. Sagittarius A is what scientist call the supermassive black hole at the center of the Milky Way galaxy, which is over 4 million times the mass of the sun. Credit: AP

Researchers studying galaxy believe there is be a supermassive black hole at the center of nearly every galaxy, just like the one in the Milky Way. These black holes help bind galaxies, which helps hold them together along with dark matter. The black hole at the center of the Milky Way, Sagittarius A, is more than four million times more massive then our sun.

2019-01-15T14:46:02+00:00 January 15th, 2019|Blog|