Is It Snap, Crackle and Pop When Galaxies and Black Holes Merge ? Part II

There is general agreement among astrophysicists, today, that most galaxies contain black holes at their center. It is, therefore, essentially a given that when galaxies merge, so do their resident black holes. Additionally, these same scientists are also hypothesizing that black holes are key controllers of the overall function and integrity of the galaxies they inhabit.

Note: In the image on the top left, "Scientists are watching two supermassive black holes spiral towards each other near the center of a galaxy cluster named Abell 400. Shown in this X-ray/radio composite image are the multi-million degree radio jets emanating from the black holes." Credit: X-ray: NASA/CXC/AIfA/D.Hudson & T.Reiprich et al.; Radio: NRAO/VLA/NRL

Let's stop here and take a moment to view this animation of merging black holes. This is a computer animation from NASA and as you watch keep in mind that, "According to Einstein's math, when two massive black holes merge, all of space jiggles like a bowl of Jell-O as gravitational waves race out from the collision at light speed.

When we watched the animation above, we sensed the intensity and drama of these merging black holes and looked for an even more descriptive and dramatic representation of this unification of celestial power. We found an excellent animation done by the Chandra project at Harvard University, and to dramatize it further we selected a snap from that animation and added a musical score to it. We call it the power dance. Please view the entire Chandra/Harvard animation by clicking here.

The increased research by astrophysicists into black holes, dark energy, and dark matter is yielding a new appreciation for Einstein's theories of relativity (special and general)and a strong theoretical move toward seeing a definite link between those theories and quantum physics. All of this is leading to renewed and new hypotheses on both the origin and the future of the universe. Although the "Big Bang" concept is still the most accepted other theories are challenging that there was ever an explosive beginning to the universe. The increased study of gravitational waves that are generated by most every action occurring in the universe promises to reveal many secrets and new understandings about our celestial environment.

LIGO and LISA gravitational wave research.

By the time gravitational waves reach Earth from distant galaxies or supermassive black holes they are quite small. For years, even though we knew they existed, we were unable to study them. Now, gravitational wave astronomy has become a new and very dynamic branch of astrophysics. Two key programs of this new astronomy are LIGO and LISA. LIGO is the acronym for Laser Interferometer Gravitational-wave Observatory and LISA, a satellite system, is the acronym for Laser Interferometer Space Antenna. Both are new means for detecting and evaluating gravitational waves. This new branch of astronomy will finally allow astronomers to learn exactly what is inside a black hole and about dark energy and dark matter and what they are and what they are doing. Note: The artist's concept of the LISA satellite is courtesy of the European Space Agency.

Well, we have not really answered what happens when black holes merge except they get bigger, they accrete more stars and some galaxies and hide all that they consume, except their gravitational waves. So, review the links on LIGO and LISA that we have provided and look forward to specific blog posts on gravitational wave astronomy and the secrets this science will reveal not just about black holes, but about the very earliest stages of the universe. There are going to be a lot of big surprises including a successful theory that merges quantum theory with Einstein's theories. They are already calling it quantum relativity.

Is It Snap, Crackle, and Pop When Galaxies and Black Holes Merge? - Part One

In the blog post, "It's Triplets", we began to consider the process of merging galaxies and included false color pictures and diagrams of these events. As promised, this posting will consider the possible effects of these mergers, and since most galaxies are host to black holes we will look at the possible impact of merging black holes. One might wonder if the universe is eating itself alive. Lets find out: read on.

Let's start by viewing NASA's movie of merging galaxies (simulation). Click MERGE to join in. Now keep in mind in the real world or universe these mergers would take millions even billions of years to come about, but the interaction is well illustrated by this NASA simulation. You can almost hear the crackle of energy and feel the power of the merger. In my mind this is not a dying universe, this is a ongoing, creative universe.

Actually, the coming together of galaxies is expressed by astro-scientists in three descriptive ways. They use the term interacting galaxies in which two, or as we have seen, three or more galaxies gravitationally interact. This is where their gravitational forces affect their respective structures. In about two to three billion years, our Milky Way galaxy and the Andromeda galaxy will begin to interact. Somewhere after that time, these two galaxies will begin to merge or collilde with one another.

The term merging galaxies refers to the process, similar to that depicted in the NASA simulation above. This is where galaxies literally come together to create a new and larger galaxy. Finally, as these two galaxies or others merge, and when their central nuclei are very close to one another, they can produce what these scientists define as starburst galaxies. This is where dynamic bursts of new star formation take place. This phenomenon is expected to take place when our galaxy and Andromeda finally merge billions of years from now. This Hubble image of galaxy NGC1569 is an example of a starburst galaxy. Now this is a small galaxy and until Hubble looked it over it was not considered a star maker. You might also notice the similarities between this galaxy's structure and that of the Crab Nebula due to their common central "hot" cores, but from entirely different origins and with equally different futures. In our opinion, these new star birthing cycles do not spell a distintegrating universe but rather one that is expanding and growing - infinitely.

Take a moment and review the previous blog post "It's Triplets" and look at the images. You will see visual examples of both interacting and merging galaxies. It is also possible that in the second image a starburst galaxy is about to occur. What do you think? To learn more on this topic, visit this link here. Additionally if you would like to see a bigger view of this little galaxy with a musical tribute to its star making efforts click here. Lastly, if you wish, click here to view an image of this galaxy taken on 11/22/08 from Slooh.com. You too can wander the universe as a Slooh.com member. Come join us.

We pause here. The discussion on colliding or merging black holes will follow in Part Two of this topic. We invite your questions and comments, please respond.

It's Triplets !

What the image above is displaying is a false color rendition of an actual astro-photograph of the NGC1725 triple galaxy (click on the image to zoom in) The members are: NGC7128 on the left, and NGC7121 on the right and NGC1725 in the center. Actually, what we see is a foursome not a threesome. Nestled close to NGC 1721 is the galaxy VV699, and it appears right at the edge of NGC 1721's halo.

Each galaxy is in a different morphological stage. NGC 1721 is in an intermediate (SBb) barred spiral state, and NGC 1725 is classed as being in a final lenticular stage (SO D). NGC 1728 is classed as a spiral galaxy in its mature stage (Sa D). If you want to delve further into galactic morphology this link, is a very recent (8/2008) and good graphical overview. References also indicate that VV 699 is essentially merged into the NGC 1725 galaxy triplet.

Well, are these galaxies merging, and if so what will be the outcome? The image on the right is another false color actual astro-photograph of merging triplet galaxies. You may click on the image to enlarge it. To see my astrophotograph of the first set of triplets, click here.

So what is the merging process? How does it really happen? This image is from a computer simulation of that process. Follow the process from left to right and top to bottom. The dashed lines indicate the flow pattern of the mergers. Let me tell you, this is just so exciting! Some naysayers say the universe is slowly dying. It will never die, it just keeps on changing, merging, and growing in different ways with enormous displays of power and energy. This process renews me, a mere human, each and every day.

I will stop here to catch my breath, ruminate a bit, and just wallow awhile in all this power and glory. When I come back we will talk more about the merging process and what happens when the inherent black holes CRASH together!! Stay tuned, please.