NGC 4486A

1. 본문

NGC 4486A is a low-luminosity elliptical galaxy in the Virgo constellation. It is located close to the celestial equator, making it partially visible from both hemispheres at certain times of the year.

Here are some of its key features:

• Nuclear Disk: NGC 4486A harbors a notable edge-on nuclear disk composed of stars and dust. This disk is believed to have formed from accreted gas.
• Supermassive Black Hole: It hosts a supermassive black hole at its center. The mass of this black hole has been measured to be (1.25 +0.75 −0.79) × 10^7 solar masses.
• Stellar Population: The galaxy's stellar population is approximately 12 billion years old throughout the main body of the galaxy. Its metallicity decreases from the center outwards.
• Kinematics: The velocity dispersion is about 132 ± 3 km/s at 1.3 arcseconds from the center and decreases outward.
• Distance: It is approximately 53.5 million light-years away from Earth.
• Apparent Magnitude: 9.59

NGC 4486A is considered a "Rosetta stone object," that provides insights into how nuclear disks form and evolve in galaxies.