NGC 1358
Galaxy in the constellation Eridanus
From Wikipedia, the free encyclopedia
NGC 1358 is a barred lenticular galaxy with ring features located in the constellation Eridanus, approximately 190 million light-years (58.2 megaparsecs) from Earth. It is classified as a Seyfert 2 galaxy, characterized by its active galactic nucleus (AGN) powered by a supermassive black hole and exhibiting strong X-ray and infrared emissions. It was discovered by astronomer John Herschel on 1 December 1837 during his observations from the Cape of Good Hope.[4][3][1][5]
| NGC 1358 | |
|---|---|
Image of NGC 1358 | |
| Observation data (J2000 epoch) | |
| Constellation | Eridanus |
| Right ascension | 03h 33m 39.7s[1] |
| Declination | −05° 05′ 22″[1] |
| Redshift | 0.0134 |
| Heliocentric radial velocity | 4,002 km/s |
| Distance | 190 Mly[2] |
| Apparent magnitude (V) | 12.78[3] |
| Apparent magnitude (B) | 13.20 [3] |
| Characteristics | |
| Type | SB0ar[1] |
| Other designations | |
| LEDA 13182, 2MASX J03333970-0505224, IRAS F03311-0515[3] | |
Characteristics
The galaxy is notable for its Compton-thick obscuration, where the central galactic core is heavily veiled by gas and dust with column densities exceeding 1024 atoms/cm². Multi-epoch monitoring with telescopes like NuSTAR and XMM-Newton has revealed variability in its X-ray absorption, linked to AGN feeding and feedback processes.[6][7][8]
Environment
The galaxy is often imaged alongside NGC 1355.[9]
Research
Recent observations (as of 2024) using the Hubble Space Telescope (HST) have provided high-resolution O III and continuum images, enabling detailed studies of the narrow-line region (NLR) and its kinematics. Research published has explored the extents, geometries, and kinematics of the NLR in Seyfert galaxies like NGC 1358, identifying signatures of AGN-driven outflows. High ionization line images from the OASIS spectrograph and follow-up observations with Chandra and NuSTAR have further characterized the nuclear activity and obscuration. The galaxy's environment, including potential interactions with nearby galaxies like NGC 1355, has been studied to understand its evolutionary context. Analysis of its globular cluster system and outer ring structures suggests a complex formation history.[10][11][12]
