| ESO 0313-192 | |
|---|---|
.jpg) ESO 0313-192 (left), as taken from Hubble Space Telescope (HST), next to LOY2001 (right) | |
| Observation data (J2000 epoch) | |
| Constellation | Eridanus |
| Right ascension | 03 15 51.80 |
| Declination | −19° 06′ 45.0″ |
| Redshift | 0.067±0.0002 |
| Distance | 1 Bly (225.9 Mpc) |
| Group or cluster | Abell 428 |
| Apparent magnitude (V) | 17.48 |
| Characteristics | |
| Type | SA(s)ca (spiral radio galaxy) |
| Size | 1.5 million ly (radio lobe(s)) |
| Apparent size (V) | 0.69 x 0.14 |
| Notable features | active galactic nuclei |
| Other designations | |
| LEDA 97372, 2MASX J03155208-1906442, NVSS J031552-190638, 0313-192 | |
ESO 0313-192 (also known as PGC 97372 and LO95 0313-192) is a edge-on spiral galaxy, or a double-lobed radio galaxy around 1 billion light-years away in the constellation Eridanus. Its radio jets were discovered in 2003 by NASA, and its radio lobes are an estimated 1.5 million light years in diameter. It is part of the cluster Abell 428, and it has an active galactic nuclei.
Characteristics
ESO 0313-192 has a spiral shape similar to that of the Milky Way. It has a large central bulge, and arms speckled with brightly glowing gas inhabited by thick lanes of dark dust. Its companion, sitting pretty in the right of the frame, is known rather unpoetically as J031549.8-190623.
Jets, outbursts of superheated gas moving at close to the speed of light, have long been associated with the cores of giant elliptical galaxies, and galaxies in the process of merging. However, in an unexpected discovery, astronomers found ESO 0313-192 to have intense radio jets spewing out from its central supermassive black hole. The galaxy appears to have two more regions that are also strongly emitting in the radio part of the spectrum, making it even rarer still.
The discovery of these giant jets in 2003, not visible in this image, but indicated in this earlier Hubble composite, has been followed by the unearthing of a further three spiral galaxies containing radio-emitting jets in recent years. This growing class of unusual spirals continues to raise significant questions about how jets are produced within galaxies, and how they are thrown out into the cosmos.
Nucleus
The core of ESO 0313-192 is rather bright as seen in the Hubble Composite. The central supermassive black hole of 0313-192 is known to be highly active, indicating the ununusually luminous bulge in the center of the galaxy. A disklike emission-line structure is seen around the nucleus, inclined by ~20° to the stellar disk but nearly perpendicular to the jets. This may represent the aftermath of a galaxy encounter in which gas is photoionized by a direct view of the nuclear continuum. The SMBH has a mass of ~8×10 M☉.
Properties
Nearly all classic double-lobed radio galaxies have either an elliptical galaxy or some kind of galactic merger at their center. However, there is one remarkable exception to this rule. In 2003, astronomers confirmed that ESO 0313-192, flanked by large, bright clouds of radio emissions, is in fact an edge-on spiral galaxy.
Twisted Disc
If you look closely enough, ESO 0313-192's dark plane of dust is distinctly twisted. This may be due to a collision or a near pass-by with a smaller galaxy, which may have sparked the galaxy's nucleus to life.
Gallery
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Radio Map image of Hubble's Advanced Camera for Surveys with a radio map from the Very Large Array
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A twisted disc is visible
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External links
- ESO 0313-192 on NASA
Media related to ESO 0313-192 at Wikimedia Commons
This article incorporates text available under the CC BY 4.0 license.
References
- ^ "A misbehaving spiral". www.spacetelescope.org. Retrieved 2023-12-12.
- ^ "PGC 97372 - Galaxy - SKY-MAP". www.wikisky.org. Retrieved 2023-12-12.
- ^ James, Hatch, Jager, Loughhead, Brown, Laurie, Thomas, Tim (2010). Space - from earth to the edge of the universe (Revised ed.). NASA. p. 299. ISBN 978-0-7566-6738-2.
{{cite book}}: CS1 maint: multiple names: authors list (link) - ^ "A Large Double Radio Source from a Spiral Galaxy: 0313-192". pages.astronomy.ua.edu. Retrieved 2023-12-12.
- ^ Morganti, R.; Holt, J.; Tadhunter, C.; Almeida, C. Ramos; Dicken, D.; Inskip, K.; Oosterloo, T.; Tzioumis, T. (2011-11-01). "PKS 1814-637: a powerful radio-loud AGN in a disk galaxy". Astronomy & Astrophysics. 535: A97. arXiv:1109.0630. Bibcode:2011A&A...535A..97M. doi:10.1051/0004-6361/201117686. ISSN 0004-6361.
- ""LO95 0313-192" – Science World". VOA. 2016-01-29. Retrieved 2024-01-08.
- "The Unruly Galaxy". Samford University. Retrieved 2024-01-08.
- Keel, William C.; White, Raymond E., III; Owen, Frazer N.; Ledlow, Michael J. (2006-12-01). "The Spiral Host Galaxy of the Double Radio Source 0313-192". The Astronomical Journal. 132 (6): 2233–2242. arXiv:astro-ph/0608086. Bibcode:2006AJ....132.2233K. doi:10.1086/508340. ISSN 0004-6256.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - Now, Astronomy. "LO95 0313-192 – Astronomy Now". Retrieved 2024-01-08.
