The NASA/ESA Hubble Space Telescope has captured an image of the spiral galaxy Messier 88 (M88), also known as NGC 4501. The galaxy is located approximately 63 million light-years away in the constellation Coma Berenices.
Galaxy Characteristics
M88 is classified as an active spiral galaxy. At its center lies a supermassive black hole with an estimated mass of 100 million solar masses. The black hole is accreting gas and dust, and may be driving outflows of gas from the galaxy's core. The central region contains old, reddish stars. From the center, the galaxy displays tightly wound, symmetrical spiral arms containing blue star clusters and dust clouds.
Position and Movement Within the Virgo Cluster
M88 is a member of the Virgo Cluster, a collection of over a thousand galaxies. The galaxy is currently moving toward the center of the cluster. It is located approximately two million light-years from its current position to the cluster's center. In an estimated 200–300 million years, it is expected to make a close approach to Messier 87, the cluster's central elliptical galaxy.
Effects of Ram Pressure Stripping
As M88 moves through the intracluster medium—the hot, diffuse gas that exists between galaxies in the cluster—it is undergoing a process called ram pressure stripping. This process removes interstellar gas from the galaxy. Evidence of this stripping includes:
- A truncated and compressed gas disk on the galaxy's leading edge.
- A measured amount of cold gas that is lower than expected for a galaxy of its size, particularly in its outer regions.
"In an estimated 200–300 million years, M88 is expected to make a close approach to Messier 87, the cluster's central elliptical galaxy."
Observation Details
The image was obtained as part of Hubble observing program #18103 (Principal Investigator: D. Thilker). The program uses Hubble's Wide Field Camera 3 to study the evolution of spiral galaxies in dense cluster environments. The observations aim to resolve individual star clusters and nebulae in galaxies located tens of millions of light-years away.