4C +69.15 also known as B1312+698, is a radio galaxy located in the constellation of Ursa Minor. The redshift of the galaxy is (z) 0.106[1][2] and it was first discovered as an extragalactic radio source by astronomers in November 1985.[3]
| 4C +69.15 | |
|---|---|
 Pan-STARRS image of 4C +69.15 | |
| Observation data (J2000.0 epoch) | |
| Constellation | Ursa Minor |
| Right ascension | 13h 13m 58.91s[1] |
| Declination | +69° 37′ 18.57″[1] |
| Redshift | 0.106000[1] |
| Heliocentric radial velocity | 31,778 ± 0 km/s[1] |
| Distance | 1,535.3 ± 107.5 Mly (470.74 ± 32.95 Mpc)[1] |
| magnitude (J) | 15.15[1] |
| Characteristics | |
| Size | ~150,000 ly (46.0 kpc) (estimated)[1] |
| Other designations | |
| 2MASX J13135885+6937179, DA 340, 8C 1312+698, GRS J1313+6937, LEDA 2731403, TXS 1312+698, VLSS J1313.9+6937[1] | |
Description
edit4C +69.15 is classified as a giant Fanaroff-Riley Class type II radio galaxy with a total linear size projection of 1.06 megaparsecs.[4][5] The host galaxy has a southeast to northeast orientation.[5] The source is compact, with a weak radio core and a bridge of radio emission based on radio imaging made by the Very Large Array (VLA) and Giant Metrewave Radio Telescope. The core is suggested to have a power spectrum turnover less than 1 GHz frequencies, with the core spectral index of around -0.4 between the range of 1.4 and 4.8 GHz.[6] The core contains a steep radio spectrum, suggesting a new phase of activity.[7]
A study published in October 2000, has found two radio lobes located in the east and west directions. These lobes are estimated to have ages of 8.0 ± 0.4 and 6.1 ± 0.5 × 107 years based on CI modelling. The equipartition magnetic field densities of 21.8 ± 2.3 and 50.1 ± 5.7 × 10-14 erg cm-3. The total energy for the eastern lobe is 2.75 ± 0.51 × 1059 erg while the western lobe has a total energy of 3.11 ± 0.57 × 1059 erg. There is an unpolarized feature interpreted as a radio jet.[8]
References
edit- 1 2 3 4 5 6 7 8 9 "NED Search results for 4C +69.15". NASA/IPAC Extragalactic Database. Retrieved 2026-05-19.
- ↑ Machalski, J.; Chyży, K. T.; Stawarz, Ł; Kozieł, D. (2007-01-01). "A method for estimating the dynamical age of FR II-type radio sources from multi-frequency data". Astronomy & Astrophysics. 462 (1): 43–55. arXiv:astro-ph/0609680. Bibcode:2007A&A...462...43M. doi:10.1051/0004-6361:20066121. ISSN 0004-6361.
- ↑ Spoelstra, T.; Patnaik, A. T.; Gopal-Krishna, A. R. (November 1985). "A sample of 25 extragalactic radio sources having a spectrum peaked around 1 GHz (list 2)". Astronomy and Astrophysics. 152: 38–41. Bibcode:1985A&A...152...38S.
- ↑ Saripalli, Lakshmi; Subrahmanyan, Ravi (2009-03-30). "The Genesis of Morphologies in Extended Radio Sources: X-Shapes, Off-Axis Distortions, and Giant Radio Sources". The Astrophysical Journal. 695 (1): 156–170. arXiv:0811.1907. Bibcode:2009ApJ...695..156S. doi:10.1088/0004-637x/695/1/156. ISSN 0004-637X.
- 1 2 Lara, L.; Cotton, W. D.; Feretti, L.; Giovannini, G.; Marcaide, J. M.; Márquez, I.; Venturi, T. (May 2001). "A new sample of large angular size radio galaxies". Astronomy & Astrophysics. 370 (2): 409–425. arXiv:astro-ph/0102034. doi:10.1051/0004-6361:20010254. ISSN 0004-6361.
- ↑ Konar, C.; Saikia, D. J.; Ishwara-Chandra, C. H.; Kulkarni, V. K. (2004-12-11). "Radio observations of a few giant sources". Monthly Notices of the Royal Astronomical Society. 355 (3): 845–854. arXiv:astro-ph/0408534. Bibcode:2004MNRAS.355..845K. doi:10.1111/j.1365-2966.2004.08362.x. ISSN 1365-2966.
- ↑ Liu, X.; Liu, J. (2008-12-16). "VLBI observation of giant radio galaxy J1313+696 at 2.3/8.4 GHz". Astrophysics and Space Science. 319 (2–4): 139–141. arXiv:1005.3357. doi:10.1007/s10509-008-9964-7. ISSN 0004-640X.
- ↑ Schoenmakers, A. P.; Mack, K.-H.; de Bruyn, A. G.; Röttgering, H. J.A.; Klein, U.; van der Laan, H. (October 2000). "A new sample of giant radio galaxies from the WENSS survey . II. A multi-frequency radio study of a complete sample: Properties of the radio lobes and their environment". Astronomy and Astrophysics Supplement Series. 146 (2): 293–322. arXiv:astro-ph/0008246. Bibcode:2000A&AS..146..293S. doi:10.1051/aas:2000267. ISSN 0365-0138.
External links
edit- 4C +69.15 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images