Black Hole at NGC4258 Center
Description
An optical image in H-alpha light of the central part of NGC 4258, which shows jet-like structures emerging from the core on a scale of a kiloparsec (3260 light-years). The inset shows the newly discovered molecular disk that contains water vapor masers. Their velocities are color coded (blue for approaching, red for receding and green for stationary with respect to the galaxy) and define nearly perfect Keplerian motion around an unseen object of 40 million solar masses.
Creator
Legacy Astronomical Images
Rights
NRAO/AUI/NSF does not hold full copyright for this image. Contact the archivist for details.
Type
Legacy Astronomical Image
Object Name
NGC4258
Photo Credit
Gerald Cecil and Holland Ford
Investigators
Makoto Miyoshi, James Moran, James Herrnstein, Lincoln Greenhill, Naomasa Nakai, Philip Diamond, Makoto Inoue
Telescope
Very Long Baseline Array (VLBA)
Observation Date
1995-00-00
Type of Observation
continuum
Band
K
Wavelength
1.2 cm
Frequency
22 GHz
Center of Image
RA 12:18:57.540, Dec: 47:18:14.300 (J2000)
Field of View
0.000011 x 0.000011 degrees
Link to journal article
Notes
Contact the archivist for a high resolution tif of this image.
Series
Active Galactic Nuclei Series
Unit
Seyferts Unit
Citation
Legacy Astronomical Images, “Black Hole at NGC4258 Center,” NRAO/AUI Archives, accessed February 5, 2025, https://www.nrao.edu/archives/items/show/33400.