Markarian 493

Markarian 493 is depicted as a face-on barred spiral galaxy of type SBb.^[4] The morphology of the galaxy is very similar to something like MRK 42, with a bright central nucleus present and star formation regions in a form of a tight wound spiral.^[5] Imaging also showed a bar and ring structure is present in the galaxy.^[6]

The nucleus of Markarian 493 is active and it has been categorized as a narrow-line Seyfert galaxy based on its spectrum.^[7][8] When observed with the Very Large Array (VLA), the source of the galaxy is mainly weak with a component that is unresolved. There is minimal optical polarization of 26%.^[9] In 2024, a central component is located with it being mainly surrounded by emission that is faint and extended. There is also a core component with a steep flux spectrum at 9 GHz frequencies.^[10]

A study published in 2008, has found the presence of a circumnuclear ring inside its central region. The ring has a total radius of between 350 and 500 parsecs with traces of continuum emission originating from emission-line gas. The star formation rate inside the ring is calculated to be around 2 M_☉ per year, with a Hydrogen-alpha luminosity being 6.7 × 10⁴¹ erg s⁻¹. In addition, there are multiple dust spiral arms located outside the ring region.^[11] The central supermassive black hole for this galaxy is estimated to be 1.5 × 10⁶ M_☉.^[12]

• Markarian 493 on SIMBAD
• Markarian 493 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images