For example, computer simulations based on observations of galaxies throughout their lives suggest that the rotational motions of the galaxies would be similar to those of normal spiral galaxies. The S0 galaxy (and its barred counterpart, the SB0) were considered to be an “intermediate” or “transition” form of galaxy between the ellipticals and spiralsIn the modern understanding of galaxies, this interpretation has been called into question, because it is now known that there exist apparently perfectly normal S0 galaxies that have significant fractions of their mass in the form of interstellar gas.Create your own unique website with customizable templates. Lenticular galaxies are unique in that they have a visible disk component as well as a prominent bulge component. We investigate the correlation between the bulge effective radius (r e ) and disk scale length (r d ) in the near-infrared K band for lenticular galaxies in the field and in clusters. There are two different explanations for the formation of a lenticular galaxy.
A … As is apparent in the Cartwheel galaxy and confirmed by numerical simulations, the passage of a small galaxy through, or close to, the center of a disk galaxy can form a ring of clumpy star formation with a radius comparable to the faint fuzzy ring radius in NGC 1023. Officially, they are classified as S0 galaxies on the Hubble Sequence. So, it's very possible that they are their own, unique galaxy type. )For this reason, lenticular galaxies can be difficult to tell apart from elliptical ones if they are viewed face-on. Lenticular galaxies are sometimes called "armless spiral galaxies." Lenticular Galaxy. We find markedly different relations between the two parameters as a function of luminosity. They have much higher bulge-to-disk ratios than typical spirals and do not have the canonical spiral arm structure of late-type[note 1] galaxies, yet may exhibit a central bar. Most lenticular galaxies are very old and have stars that are far down the stellar evolution process. So, astronomers are working to understand why there is a difference in rotational motions between types of galaxies. A lenticular galaxy will have either used up or lost most of its interstellar matter (dust and gas), which will reduce or prevent the formation of stars. Lenticular galaxies generally have flat, disk-like shapes. Lenticular galaxies have a central bulge, but no spiral arms. However, unlike spiral galaxies, they lack the distinctive arms that usually wrap themselves around the central bulge. Often referred to as armless-spirals, or armless disks, lenticular galaxies define the forking point in the Hubble galaxy classification scheme, marking the transition from elliptical to spiral galaxies. It turned out that Hubble's original sequence didn't quite match the data we have about galaxies today, but the diagram is still very useful in classifying galaxies by their shapes.Hubble's groundbreaking work on galaxies may have influenced at least one of the formation theories of lenticulars.
When viewed edge-on, lenticular galaxies (alternatively called S0 galaxies) have a shape reminiscent of a lens (hence the alternative name). One is that they are spirals that have faded over
If they were truly faded spiral galaxies, you would expect them to be dimmer, not brighter.So, as an alternative, some astronomers now suggest that lenticular galaxies are the result of mergers between two old, spiral galaxies. Their disk-like, possibly dusty, appearance suggests they come from faded spiral galaxies, whose arm features disappeared. Credit:NASA/ESAA lenticular galaxy is a type of galaxy which is intermediate between an elliptical galaxy and a spiral galaxy in galaxy morphological classification schemes. However, unlike spiral... Lenticular Galaxies and the Hubble Sequence . Also, with the combined mass of two galaxies, the higher surface brightness would be explained.This theory still needs some work to solve some issues. If the central bulge is not very bright, it can be very difficult to tell the difference between a lenticular galaxy and an E0 galaxy. Lenticular galaxies, also called S0s, earned their name from their edge-on lens-like appearance.
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