- Twenty-six black hole candidates have been identified in Andromeda, aka M31, adding to 9 previously found.
- This is the largest number of possible black holes to date ever found in a galaxy outside of our own Milky Way.
- These are stellar-mass black holes, which are formed by the collapse of a giant star and have masses between five and 10 times the Sun's.
- Researchers used over 150 separate Chandra observations spread over 13 years to obtain these results.
Data from NASA's Chandra X-ray Observatory have been used to discover 26 black hole candidates in the Milky Way's galactic neighbor, Andromeda, as described in our latest press release. This is the largest number of possible black holes found in a galaxy outside of our own.
A team of researchers, led by Robin Barnard of the
Harvard-Smithsonian Center for Astrophysics, used 152 observations of
Chandra spanning over 13 years to find the 26 new black hole candidates.
Nine were known from earlier work. These black holes belong to the stellar-mass black hole category, which means they were created when a massive star collapsed and are about 5 to 10 times the mass of the Sun.
This wide-field view of Andromeda contains optical data from the
Burrell Schmidt telescope of the Warner and Swansey Observatory on Kitt
Peak in Arizona. Additional detail of the core and dust in the spiral
arms comes from an image taken by astrophotographer Vicent Peris using
data from two of his personal telescopes. In this combined optical
image, red, green, and blue show different bands from the visible light
portion of the electromagnetic spectrum.
The inset contains X-ray data from multiple Chandra observations of
the central region of Andromeda. This Chandra image shows 28 of the 35
black hole candidates in this view, visible by mousing over the image.
The other seven candidates can be seen in this Chandra image with a larger field of view.
Chandra X-ray close-up of M31's core, with sources circled.
Seven of the 35 black hole candidates are within only 1,000 light years
of the Andromeda Galaxy's center (mouse over the image for the dotted
circle enclosing these sources). This is more than the number of black
hole candidates with similar properties located near the center of our own Galaxy.
This, however, does not take astronomers by surprise, since the bulge
of stars in the middle of Andromeda is bigger, allowing more black holes
to form.
Eight of the nine black hole candidates that were previously identified are associated with globular clusters,
the ancient concentrations of stars distributed in a spherical pattern
about the center of the galaxy. This also differentiates Andromeda from
the Milky Way as astronomers have yet to find a similar black hole in
one of the Milky Way's globular clusters.
Andromeda, also known as Messier 31 (M31), is a spiral galaxy located
about 2.5 million light years away. It is thought that the Milky Way
and Andromeda will collide
several billion years from now. The black holes located in both
galaxies will then reside in the large, elliptical galaxy that results
from this merger.
These results are available online
and will be published in the June 20th issue of The Astrophysical
Journal. Many of the Andromeda observations were made within Chandra's
Guaranteed Time Observer program.
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Visitor Comments (3)
Want to see more.
Posted by gray kolya on Thursday, 06.13.13 @ 09:00am
It appears to me, that, eventually all the black holes will join up
in every galaxy, with gravity being so powerful, all the galaxies
will be attracted to each other, and all the black holes will eventually
join together to form one black hole, and then BANG a new Universe.
in every galaxy, with gravity being so powerful, all the galaxies
will be attracted to each other, and all the black holes will eventually
join together to form one black hole, and then BANG a new Universe.
Posted by RON on Thursday, 06.13.13 @ 08:58am
Very important information &great photos
Posted by Rajika RUwini on Thursday, 06.13.13 @ 02:49am
Andromeda Galaxy
Data from NASA's Chandra X-ray Observatory have been used to discover 26
black hole candidates in the Milky Way's galactic neighbor, Andromeda,
as described in our latest press release. This is the largest number of possible black holes found in a galaxy outside of our own.
A team of researchers, led by Robin Barnard of the Harvard-Smithsonian Center for Astrophysics, used 152 observations of Chandra spanning over 13 years to find the 26 new black hole candidates. Nine were known from earlier work. These black holes belong to the stellar-mass black hole category, which means they were created when a massive star collapsed and are about 5 to 10 times the mass of the Sun.
This wide-field view of Andromeda contains optical data from the Burrell Schmidt telescope of the Warner and Swansey Observatory on Kitt Peak in Arizona. Additional detail of the core and dust in the spiral arms comes from an image taken by astrophotographer Vicent Peris using data from two of his personal telescopes. In this combined optical image, red, green, and blue show different bands from the visible light portion of the electromagnetic spectrum.
The inset contains X-ray data from multiple Chandra observations of the central region of Andromeda. A larger view can be seen in the Chandra image at this link.
Seven of the 35 black hole candidates are within only 1,000 light years of the Andromeda Galaxy's center. This is more than the number of black hole candidates with similar properties located near the center of our own Galaxy. This, however, does not take astronomers by surprise, since the bulge of stars in the middle of Andromeda is bigger, allowing more black holes to form.
Eight of the nine black hole candidates that were previously identified are associated with globular clusters, the ancient concentrations of stars distributed in a spherical pattern about the center of the galaxy. This also differentiates Andromeda from the Milky Way as astronomers have yet to find a similar black hole in one of the Milky Way's globular clusters.
Andromeda, also known as Messier 31 (M31), is a spiral galaxy located about 2.5 million light years away. It is thought that the Milky Way and Andromeda will collide several billion years from now. The black holes located in both galaxies will then reside in the large, elliptical galaxy that results from this merger.
These results are available online and will be published in the June 20th issue of The Astrophysical Journal. Many of the Andromeda observations were made within Chandra's Guaranteed Time Observer program.
Credits: X-ray: NASA/CXC/SAO/R. Barnard, Z. Lee et al.; Optical: NOAO/AURA/NSF/REU Program/B. Schoening, V. Harvey and Descubre Foundation/CAHA/OAUV/DSA/V. Peris
› Read more/access all images
› Chandra's Flickr photoset
A team of researchers, led by Robin Barnard of the Harvard-Smithsonian Center for Astrophysics, used 152 observations of Chandra spanning over 13 years to find the 26 new black hole candidates. Nine were known from earlier work. These black holes belong to the stellar-mass black hole category, which means they were created when a massive star collapsed and are about 5 to 10 times the mass of the Sun.
This wide-field view of Andromeda contains optical data from the Burrell Schmidt telescope of the Warner and Swansey Observatory on Kitt Peak in Arizona. Additional detail of the core and dust in the spiral arms comes from an image taken by astrophotographer Vicent Peris using data from two of his personal telescopes. In this combined optical image, red, green, and blue show different bands from the visible light portion of the electromagnetic spectrum.
The inset contains X-ray data from multiple Chandra observations of the central region of Andromeda. A larger view can be seen in the Chandra image at this link.
Seven of the 35 black hole candidates are within only 1,000 light years of the Andromeda Galaxy's center. This is more than the number of black hole candidates with similar properties located near the center of our own Galaxy. This, however, does not take astronomers by surprise, since the bulge of stars in the middle of Andromeda is bigger, allowing more black holes to form.
Eight of the nine black hole candidates that were previously identified are associated with globular clusters, the ancient concentrations of stars distributed in a spherical pattern about the center of the galaxy. This also differentiates Andromeda from the Milky Way as astronomers have yet to find a similar black hole in one of the Milky Way's globular clusters.
Andromeda, also known as Messier 31 (M31), is a spiral galaxy located about 2.5 million light years away. It is thought that the Milky Way and Andromeda will collide several billion years from now. The black holes located in both galaxies will then reside in the large, elliptical galaxy that results from this merger.
These results are available online and will be published in the June 20th issue of The Astrophysical Journal. Many of the Andromeda observations were made within Chandra's Guaranteed Time Observer program.
Credits: X-ray: NASA/CXC/SAO/R. Barnard, Z. Lee et al.; Optical: NOAO/AURA/NSF/REU Program/B. Schoening, V. Harvey and Descubre Foundation/CAHA/OAUV/DSA/V. Peris
› Read more/access all images
› Chandra's Flickr photoset
NASA
Guillermo Gonzalo Sánchez Achutegui
ayabaca@gmail.com
ayabaca@hotmail.com
ayabaca@yahoo.com
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